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An Introduction to Economic Reasoning David Gordon Ludwig von Mises Institute 518 West Magnolia Avenue Auburn, Alabama 36832-4528
Copyright 2000 Ludwig von Mises Institute. All rights reserved. Published by the Ludwig von Mises Institute, 518 West Magnolia Avenue, Auburn, Alabama 36832-4528. (www.mises.org) ISBN: 0-945466-28-5
D edicated to Quintin E. and Marian L. Ward, with deepest gratitude.
I am first of all indebted to Mr. and Mrs. Quintin E. Ward, whose generous support made this book possible. Mr. Wards career and achievements exemplify the free market in action. For very helpful comments on the manuscript, I thank Hans Hoppe, Jeffrey Herbener, Joseph Salerno, and Mark Thornton. They bear no responsibility for any remaining mistakes. At the Mises Institute, Judy Thommesen and Kathy White han dled editorial work in the manuscript with great skill. I thank Mises Institute Member Richard Perry for preparing the index. Pat Barnett, as always, was a constant source of encouragement. She also provided me with helpful comments and corrections. The pres ident of the Mises Institute, Lew Rockwell, not only commissioned the project: he nudged it along through gentle prodding. To all of these, many thanks. Acknowledgements
Table of Contents INTRODUCTION................................................................................ i 1 THE METHOD OF ECONOMICS..........................................................1 2 ACTION AND PREFERENCE, PART 1................................................15 3 ACTION AND PREFERENCE, PART 2................................................35 4 DEMAND AND SUPPLY...................................................................55 5 THE LABOR THEORY OF VALUE......................................................83 6 PRICE CONTROLS........................................................................103 7 MINIMUM WAGES AND WAGE CONTROL.......................................117 8 MONEY, PART 1..........................................................................131 9 MONEY, PART 2..........................................................................147 10 THE GOLD STANDARD.................................................................161 CONCLUSION..............................................................................175 GLOSSARY..................................................................................177 RECOMMENDED READINGS.........................................................185 INDEX........................................................................................187
W hy, indeed? A good short answer is that you cant get away from it. Almost everything you do involves economics. Why do people have to earn a living? Why do some peopleheavy weight boxers, rock stars, and movie producers, for exampleearn vastly more than bus drivers or policemen? What determines the price of a Big Mac, or, for that matter, a Mack truck? Whenever you have to deal with money or prices, you are talking about econom ics. To paraphrase Monsieur Jourdain, a character in a play by the seventeenth-century French writer Molire, you have been speak ing economics all your life. But granted the pervasiveness of economics questions, why study them systematically? After all, we are all governed by the law of gravitytry jumping off a cliff sometime if you dont think so but does it follow that we have to study physics? If people dont understand the basic laws of economics, we are headed for disaster. You dont have to understand much physics to know why its not a good idea to jump off a cliff; but an economy that runs well depends on enough people grasping some simple truths about how the price system works. As well see throughout this book, a sound economy depends on allowing people to act freely. If politicians interfere with the free market, or attempt to replace it entirely with socialism, we are in for trouble. Introduction WHY STUDY ECONOMICS? ix
And some people are always tempted to do this. They think that by one or another hare-brained scheme, they can promote their own welfare. Unless you understand the key elements of econom ics, you may fall for some of these ideas. If people do so, the econ omy will suffer or collapse altogether; and we may lose our freedom as well. A little time spent learning economics will help you to avoid a great deal of trouble later. Thomas Carlyle, a famous British writer of the nineteenth cen tury, once called economics the dismal science. But, if economics is studied in the right way, its a lot of fun. This may surprise you, if you have ever looked at a college textbook on economics. Most textbooks have so many equations in them that they look like a rail road timetable. We wont be doing that here. This book contains no complicat ed math. But at this point you have probably thought of an objec tion. Even if this book doesnt have complicated math, this is not enough to make studying it fun. After all, English grammar doesnt use math either, but most students dont rank it among the most enjoyable subjects in their school careers. x An Introduction to Economic Reasoning WHY YOU WILL ENJOY ECONOMICS Franklin D. Roosevelt Rather, the main reason economics is fun is this: You dont have to accept anything as true just because the book says so, or your teacher tells you. Everything in economics is (or should be) a matter of reason and evidence. As you know, this is not true for many subjects you study. Suppose, for example, you read in your history textbook: Franklin Roosevelt saved the United States from revolution by reforming capi talism. (We assume that you are not a student in a school so progressive that you dont study histo ry.)
Introduction xi How are you to know whether the statement about Roosevelt is true? You have to accept what the text (or your teacher) tells you. Only in college courses (and sometimes not even there) will you find out why historians make the claims they do. Sometimes this can lead to trouble. What if the textbook is wrong? For example, the claim about Roosevelt just given is com pletely mistaken. Roosevelts New Deal measures were disastrous. You may end up knowing things that just arent true. Is the solution not to believe what your teachers tell you? No, (or at least not always)then you couldnt learn history at all. There is simply so much to learn that you have to start somewhere. Only after you have learned a great deal will you be in a position to understand why historians make the statements they do. You will encounter the same thing when you study science. Why is the sun is millions of miles distant from the earth true, but the moon is made of green cheese false? You wont be able to find out unless you accept (at least temporarily) a great many other statements just on faith. This situation can sometimes lead to frus tration. You must learn things without understanding why they are true. Wouldnt it be great to study a subject in which you dont have to do this? But havent we already gotten into trouble? Why should you believe the claim this book made about Roosevelt? (That is, the claim that it is false that FDR saved capitalism.) Are you being asked to accept this on faith? Not at all. By the end of the book, you will understand why the economic policies that Roosevelt followed could not work. So far, there is a major gap in our chapter. Weve predicted that you will like economics, because you dont have to rely on authority. WHAT IS ECONOMICS?
But we have neglected to tell you what economics is. Has the osten sible subject of this book been forgotten? As you can guess, the answer is no. An explanation of method is essential to understand economics, as we propose to do here. In one sense, its obvious what economics is about; topics such as prices, wages, production, banking, inflation, the business cycle, etc., read ily come to mind. One way to proceed would be to make a list of these, and similar topics, and then tell something about each one. This method, if it can be called that, was actually used by some economists in the nineteenth and twentieth centuries. In Europe, these economists were called historicists; in the United States, institutionalists. As you may imagine, economics done this way is unsystematic: it isnt at all a matter of applying deductive rea soning. In historicist economics, you do have to take practically everything on the books say-so. Economists such as Gustav Schmoller, Werner Sombart, and Thorstein Veblen, who belonged to these schools, very rarely engaged in deductive reasoning. Their attitude was Take down what I give you or get out! The economics followed in this book is that of the Austrian School, founded by Carl Menger in the nineteenth century and xii An Introduction to Economic Reasoning Gustav Schmoller 1838 Werner Sombart 1863 Thorstein Veblen 1857
Introduction xiii ? Carl Menger 1840 Ludwig von Mises 1881 Murray N. Rothbard 1926 continued in the twentieth century preeminently by Ludwig von Mises and Murray Rothbard. Rather than take economics to be a loosely-put-together list of topics, it is characterized by a strictly deductive approach. Austrian economists start from a single principle, the action axiomall men act. From this axiom, and a few added assump tions, we will attempt to deduce significant truths about all of the topics mentioned in the previous paragraphs but one. You will be the judge of our success. But before we can see how Austrian eco nomics proceeds, we must first explain deduction. 1. When is it reasonable to accept judgments, just because the book says so? 2. See whether you can find out why Carlyle called econom ics the dismal science.
I n economics, we operate with deductive logic. (Bertrand Russell, a twentieth-century English philosopher, once said that there are two kinds of logic, deductive and bad.) Deductive logic is a tool of amazing power. Given a true state ment, we can, by using deduction, obtain other true statements from it. These new statements not only are truetheir truth is guaranteed! If the statements we started with are true, then our conclusions are also true. Lets look at a few examples: ALL COMMUNISTS ARE TWO-HEADED MONSTERS KARL MARX WAS A COMMUNIST THEREFORE, KARL MARX WAS A TWO-HEADED MONSTER Does the conclusion, Karl Marx was a two-headed monster, follow from the premises (the statements it was deduced from)? Yes, it does. Then, if the premises are true, so is the conclusion. Have we proved that Karl Marx was a two-headed monster? Not so fast. All we know is that if the premises are true, then so is the conclusion. Unless both premises are in fact true, we cant claim that they show the conclusion to be true. Chapter 1 The Method of Economics DEDUCTIVE METHOD 1
What good is logic, then? Well, lets go over the basic point again. We know that whenever the premises are true, the conclu sion is true. An argument in which the conclusion is correctly deduced from the premises is called a valid argument. If we can (somehow) arrive at true premises, then we are guaranteed true conclusions. And, as you will discover in this book, sometimes obvious truths can have very startling consequences. But this raises a further question. What are the rules for correct inference, and how do we know these rules are true? Are we back to accepting things just because the book says so? Again, not at all. The discipline that studies the rules of valid reasoning is logic. In this book, we wont be studying these laws in a systematic way. But the rules of inference well be using are very simple, common sense ones. You will be able to see right away that they are right. Lets look at the example just presented. The first, or major, premise, can be diagrammed like this: Similarly, we can diagram the second premise: 2 An Introduction to Economic Reasoning TWO-HEADED MONSTERS COMMUNISTS COMMUNISTS KARL MARX
And then the conclusion: The inference rule we are using is: If class a is included in class b and class b is included in class c then class a is included in class c You can see, just by thinking about it, that this rule is correct. 1. How would you argue with someone who refused to accept the rule of inference given in this section? 2. The basic rules of logic were first discussed in detail by the Greek philosopher Aristotle (384 B.C.). Try to find out something about his life. Who was his teacher? Who was his most famous student? Now, we are going to dig a little deeper. Aristotle asked an important question. Why are the inference rules of logic true? He thought that there are three laws that provide a foundation for all logical truth. These laws are sometimes called laws of thought, but this is a misnomer. According to Aristotle, these laws govern reality. The three laws are the following: Chapter 1: The Method of Economics 3 THE LAWS OF LOGIC TWO-HEADED MONSTERS KARL MARX ?
4 An Introduction to Economic Reasoning 1. A = A: The Law of Identity 2. Not (A and not A): The Law of Non-Contradiction 3. A or not A: The Law of Excluded Middle We only have time to give a very brief account of these here. The Law of Identity means, as Bishop Joseph Butler put it, that a thing is what it is. Its hard to state this in a form that doesnt repeat the principle. If you dont yet get it, some example might help: If this book is boring, then this book is boring. If roses are red, then roses are red. If roses are yellow, then roses are yellow. What would be simpler? The Law of Non-Contradiction is equally easy to grasp. Lets use the same set of examples as before, suitably modified. If this book is boring, then it is not the case that this book is not boring. If roses are red, then it is not the case that roses are not red. If roses are yellow (you fill in the rest). The hardest of the three laws for students to get is the third one. Suppose we take any two contradictory properties, e.g., red and not red (to get the contradictory of a property by negating it). Anything must be either red or not red. Thus, the number five is not red. Rudolph the Red-Nosed Reindeers nose is red. The Gross National Product is not red. Anything whatever is either one or the other of any set of contradictory qualities. 1. Can something be both red and not red? 2. Some philosophers have denied that these laws are always true. Marxists say, e.g., that everything is constantly changing; therefore, the Law of Identity isnt true. Why is this objection based on a misunderstanding of the Law of Identity? ?
Chapter 1: The Method of Economics 5 We now know that if you start with true premises, you will arrive at a true conclusion. A valid argument transmits truth from the premises to the conclusion. What happens if one of the prem ises is false? Does this make the conclusion false? Not necessarily. All our rule says is that true premises transmit truth: it says nothing about how premises and conclusion are related with a false premise. In the example already used, the major premise is false. Its not the case that all communists are two-headed monsters. The conclu sion is also false: Marx was not a two-headed monster. But this pat tern by no means always holds true. Lets look at another example: ALL SCORPIONS ARE DEMOCRATS HILLARY CLINTON IS A SCORPION THEREFORE, HILLARY CLINTON IS A DEMOCRAT Both the premises are false. (Perhaps the falsity of the second premise is arguable!) But the conclusion is true: Hillary Clinton is a Democrat! How can this be? By now, you should know the answer. The conclusion is true, but the premises dont make it true. These premises do not trans mit truth, since they are false. Just to make things absolutely clear, all the premises must be true for truth to be transmitted. One false premise prevents the rule from applying. Notice that the rule requires both true premises and a valid argument. This example does not meet our requirement: SOME TEXANS ARE TALL SOME TALL PEOPLE ARE DEMOCRATS SOME TEXANS ARE DEMOCRATS VALIDITY CONTINUED
6 An Introduction to Economic Reasoning TALL PEOPLE TEXANS TALL PEOPLE TALL PEOPLE DEMOCRATS TEXANS This argument is invalid: the conclusion does not follow from the premises. Can you see why? Lets resort to diagrams again: The first premise: The first premise says that the classes of tall people and Texans intersect, or have some members in common. It does not say that the class of Texans is included in the class of tall people. (Can you give the premise for which this is the correct diagram?) Similarly, the second premise looks like this: It states that these two classes, tall people and Democrats, intersect. You can now see why the conclusion does not follow. The con clusion, some Texans are Democrats, looks like this:
Chapter 1: The Method of Economics 7 Our premises allow this to be true, but they dont require it. This is also consistent with our premises: Both premises will be true, and the conclusion turns out to be false. Can you see how this is possible? Once again, use of a diagram will help. Suppose this was the situation: Here, both of our premises are represented. The diagram shows that some Texans are tall, and also that some tall people are Democrats. But, in this state of affairs, no Texans are Democrats. The tall people who are Texans are different tall people from those who are Democrats. In fact, of course, both of the premises are true; and so, is the conclusion. Lyndon Baines Johnson, whom most of you wont recall, was both. (If you do remember LBJ, what are you doing still in school?) Even though premises and conclusions are both true, the premises do not transmit their truth to the conclusion, since the argument is invalid. DEMOCRATS TEXANS TEXANS DEMOCRATS TALL PEOPLE TEXANS DEMOCRATS
? 8 An Introduction to Economic Reasoning STILL MORE ON VALIDITY Can true premises in an invalid argument lead to a false con clusion? Certainly. ALL AUSTRIAN ECONOMISTS SUPPORT THE SUBJECTIVE THEORY OF VALUE NO AUSTRIAN ECONOMIST LIVED BEFORE THE NINETEENTH CENTURY THEREFORE, NO SUPPORTER OF THE SUBJECTIVE THEORY OF VALUE LIVED BEFORE THE NINETEENTH CENTURY As we shall see later in this book, both of the premises are true, but the conclusion is false. 1. Diagram the argument just given. Show why the conclu sion does not follow. 2. Given examples of (a) valid arguments with true premises; (b) valid arguments with at least one false premise; (c) invalid arguments with at least one false premise; (d) invalid arguments with true premises. Must any of these types always lead to a false conclusion? Fortunately, we have only one more rule to cover about trans mission of truth. In a valid argument, if the conclusion is false, then at least one of the premises must be false. A valid argument trans mits the falsity of the conclusion to at least one premise. Once again, an example: MINIMUM WAGE RATES LEAD TO UNEMPLOYMENT
Chapter 1: The Method of Economics 9 ? LUDWIG VON MISES FAVORED MINIMUM WAGE RATES THEREFORE, MISES FAVORED A GOVERNMENT POLICY THAT LEADS TO UNEMPLOYMENT Here, the conclusion is false: how false you will discover later in the book. But the argument is valid. Then, our rule tells us that at least one of the premises is false. In this case, it is the second prem ise. Mises, who is one of this books heroes, opposed minimum wage laws. But the first premise is true; and by the end of the book, you will be able to explain why. Thus, our rule does not say that in a valid argument with a false conclusion, both premises are false. It says that at least one is false. And if in fact just one premise is false, the rule doesnt tell us which one it is. 1. Show, using diagrams, that the argument about Mises is valid. 2. Give examples of a valid argument with a false conclusion that has (a) one false premise and one true premise; (b) two false premises. 3. Suppose you have an invalid argument with a false con clusion. What can you tell about the truth of the premis es? The type of argument that we have been discussing so far is called a categorical syllogism It has two premises, both statements of (alleged) fact, and a conclusion. But not all valid arguments take this form: it was discussed here because you can easily grasp what valid ity means if you take examples of this kind. But premises can also be DEDUCTION EXTENDED
10 An Introduction to Economic Reasoning ? hypothetical. For example, the statement: If wishes were dollars, Social Security would be financially sound does not claim either that wishes are dollars or that Social Security is financially sound. All that the statement claims is that if wishes were dollars, then Social Security would be sound. A syllogism can have either one or two hypothetical premises. 1. Give examples of syllogisms with (a) one and (b) two hypo thetical premises. 2. Can you show how to convert a hypothetical premise into a categorical one? That is, show how an if-then state ment can be changed into another statement about a mat ter of fact. If you can answer this, you will have no diffi culty getting an A in the course. In fact, you are proba bly in the wrong class. We have just a little bit more technical machinery to get through. Unfortunately, this is the most difficult section of the chapter. Fortunately, it isnt very long. Some premises are stronger than mere factual claims. Lets return to a variant of an old friend: Some communists are two-headed monsters. This (false) premise does not say that some communists have to be two-headed mon sters, i.e., that they couldnt possibly be anything else. It just says that they are in fact two-headed monsters. Contrast this statement with the following: No one can be his own father. This does not just say that no one is in fact his own father: it makes the stronger claim that no one possibly could be his own father. No matter how we change features of the actual world, DEDUCTION FURTHER EXTENDED
Chapter 1: The Method of Economics 11 this statement is always true. Its part of the nature of being a father that you cant be your own father. Necessarily true propositions (but not the one about fathers) play an important part in economics, and you would be well-advised to reread the preceding paragraph carefully. (Instructors should police students at this point to make sure students understand what a necessary proposition is. If necessary, mild electric shocks may be administered.) Now for the hard part: In a categorical syllogism, one that does not contain necessarily true premises, the conclusion need not itself be necessarily true, even though it follows of necessity from the premises. Got that? Lets have another look. Consider this case: SOME ECONOMISTS ARE STUPID NO AUSTRIAN ECONOMISTS ARE STUPID THEREFORE, SOME ECONOMISTS ARE NOT AUSTRIAN The initial premise is (alas!) true. The truth of the second premise is a matter for discussion. But neither premise is necessary: it could have turned out, however unlikely, that all economists are intelligent. And though difficult to conceive of, it might have been the case that there are stupid Austrian economists. And the conclu sion is also not necessarily true. All economists might have turned out to be Austrian economists. (Austrian economics is the founda tion for this book. See page 19 for an explanation.) Nevertheless, the conclusion necessarily follows from the premises. If the premises are true, then it must be the case that the conclusion is true. Given our two premises, it must be the case that some economists are not Austrians. Then why is it wrong to say that the conclusion is necessary? If it must be the case that some economists are not Austrians, isnt this just what it means to say that, necessarily, some economists are not
Austrians? Yes; but, remember we are not asserting that it must be the case that some economists are not Austrians. We are saying that if the premises are true, then some economists are not Austrians. One more complication, and then we are out of the woods (at least for now). A syllogism with two premises that are not necessar ily true can turn out to have a conclusion that is necessarily true. All that weve been trying to show is that it does not have to turn out this way. Here is an example of a valid syllogism with two non-nec essary premises. (The technical term for non-necessary is con tingent.) SOME FATHERS ARE PROFESSIONAL FOOTBALL PLAYERS ALL PROFESSIONAL FOOTBALL PLAYERS ARE MALE SOME FATHERS ARE MALE Although the conclusion follows from two contingent premis es, it itself is necessarily true. (Why? Because it follows directly from the necessarily true All fathers are male. There is a compli cation here [having to do with existential import] that we can ignore. Some logicians dont think All fathers are male entails some fathers are male. Why not? In their view, all fathers are male means if x is a father, x is male. This does not entail that there are any fathers But some fathers does entail that there are fathers. See, I told you we should ignore this.) Were now over the hard part. It was important to look at nec essary propositions, as they play a key role in economics. And there is one further extension we need to look at. Not all valid deductive arguments are syllogistic. Putting that into English, a valid argument doesnt have to have two premises. Suppose we start with this premise: All socialists are subversives. From this, we may at once deduce: All fatheaded socialists are fatheaded sub versives. No intermediate premises are needed. 12 An Introduction to Economic Reasoning
Chapter 1: The Method of Economics 13 ? ECONOMICS VS. MATHEMATICS This sort of immediate inference is very important in econom ics, especially of the Austrian variety. We often are given a concept and then required to deduce various features of it that follow immediately. As we shall see, the concept of action is the most important one we use in economics. Much of economics consists of deducing what follows from the concept of action, and a good deal of this inference is immediate rather than syllogistic. 1. How can you find out if a statement is necessarily true? 2. If a statement is necessarily true, do you need to test it to find out whether it is true? But if economics proceeds strictly by logic, so that you dont have to accept statements on authority, doesnt this mean that eco nomics is really mathematical, after all? In math, you operate through proof. Suppose x = 5. Then, 2x = 10. (Dont worry, this is the toughest math in the book.) 2x = 10 is true because it follows from applying the rule if you multiply one side of an equation by two, you must multiply the other side by two also. You arrive at the conclusion, 2x = 10, because that is what the rule tells you to do. Economics also uses proof, but the way it proceeds often differs from mathematical proofs. In math, to reiterate, you operate by fixed rules on certain symbols. Once you know the rule, you can fill in the blank here with almost no thought: x = 5, 2x = ____. Its an almost mechanical process. But this isnt always the case in eco nomics.
14 An Introduction to Economic Reasoning ? Lets return to immediate inference. In the last section, we gave an example of a valid immediate inference. Lets look at an infer ence that on the surface looks similar: ALL SOCIALISTS FAVOR SUBVERSION THEREFORE, ALL RUSSIAN SOCIALISTS FAVOR RUSSIAN SUBVERSION Here, the conclusion is false. The truth of the premise is con sist ent with the falsity of the conclusion. Suppose some Russian socialists wish to overthrow the Bulgarian government, rather than their own. If so, the premise might be true, but the conclusion would be false. But how do we know this? No mechanical rule will tell us which immediate inferences work, and which do not. We simply have to use our judgment; and this is often true for non-immediate infer ence as well. 1. How do we know the rules of mathematics are correct? 2. Would it be a good idea to use symbolic logic in econom ics, if economics relies on immediate inferences? 3. Is it always best to begin by defining your terms? Why or why not? 4. Deduction only tells us what we already know. How might a supporter of the deductive approach reply?
A fter getting through Chapter 1, you may have wondered: what does all of this have to do with economics? In this chapter, well find out. What we are going to attempt is to apply the deductive method in order to build up a science of economics. Remember, if we carry out this task correctly, we will have achieved something remarkable. Given a true starting point, our conclusions must be true. This at once raises a key issue. What should be chosen as the starting point? To pick the wrong initial premise threatens disaster. Suppose, for example, we started with this premise: The econom ic value of a good consists of the labor necessary to make it. This statement, as well soon discover, is false. Anything we deduce from it, then, is not guaranteed to be true. Our conclusions may be true, but they wont be true because they follow from our starting point. Its easy to think of true propositions that we might start with that isnt the problem. + 2 = 4 is, unarguably, true; so is Some U.S. presidents have been big spenders. The hard part is to arrive at a true proposition that will lead to significant results. Fortunately, through the genius of the Austrian economist Ludwig von Mises, this problem has been solved. The fundamental principle of economics can be stated in two words: man acts. Most of the rest of this book will endeavor to clar ify Chapter 2 Action and Preference Part I THE ACTION AXIOM 17
18 An Introduction to Economic Reasoning ACTION ? what this axiom means, and to draw out its implications. Our first question is obvious: what is an act? Incidentally, man in the axiom of course refers to both men and women. Man is a general term that means human beings. This is perfectly acceptable English usage, in spite of the absurd posturing of the politically correct. Feel perfectly free to substitute human beings for man in the axiom, if you are so inclined; I cant help it if you cave in before a silly political fashion. But I digress. What is an action? It is easier to give examples than to offer a watertight definition. Reading a book, voting for class president, doing your homework, and playing soccer are all actions. (If you have the misfortune to attend a progressive school, look up homework in the dictionary.) Any conscious behavior counts as actionan action is anything that you do on purpose. 1. The action axiom is trivial. Everybody knows its true. Its like a red light means stop; nothing interesting follows from it. Whats wrong with this argument? 2. List some other basic terms besides action that are hard to define exactly, even though everybody knows what they mean. 3. Unless we define our terms, we cant think accurately. It isnt enough, then, to have an approximate idea of what action means. We need an exact definition. Is this line of thought correct? Why or why not? Use your answer to the preceding question to help you with this one. Its important to note a basic distinction here. Not everything that happens to a person counts as an action: an action must be done deliberately. While you are reading this, your pulse is beating
Chapter 2: Action and Preference, Part 1 19 ? (I hope). But this is not something that you have decided to do: it is a process that goes on automatically in your body. Reading, of course, is an action. You dont read just by having a newspaper page put in front of you; you have to decide to do it; and, while youre reading, the process is under your conscious control. Some actions dont require much conscious control. For most people, walking takes place without having to think explicitly about each step. You dont say to yourself, Left foot, right foot; now left again, etc., you just walk. Nevertheless, the process is under your conscious control. Imagine what it would be like if things were dif ferent. Suppose you suddenly found your legs moving by them selves, and your efforts to will them to stop failed. Then you would nt be acting, although your body would be moving. 1. Are nervous tics actions? Sleepwalking? Epileptic fits? 2. Walking isnt really an action. Walking just consists of other actions, such as moving your legs. Whats wrong with this argument? Normally, an action includes some physical movements of the body. When you walk, your legs move; when you read, your eyes are constantly shifting focus. Some actions dont seem to involve physical movement, e.g., thinking. (There are all sorts of things going on in your brain when you think, but are these thinking itself? Could thinking take place altogether apart from any physical entity? Fortunately, we dont have to solve these issues here.) But the actions well be concerned with in economics do, for the most part, involve physical movements; examples include buy ing, selling, investing, and laboring. Well take thinking for our
purposes as part of action, rather than as a separate act itself. (Note, however, that ordinary usage includes acts of thought.) Not all outward actions, however, do involve physical move ment. Suppose you are thinking about going for a walk. You decide not to; you find appealing the remark of R.M. Hutchins: Whenever I feel like exercise, I lie down until the feeling goes away. You still act; in this context, staying put is an action. There are even a few cases in which you can do something besides waiting or staying put without any physical movement tak ing place. Imagine that you are a member of Congress. A resolution has been proposed to increase taxes by 50 percent. The Speaker announces: All those in favor, please stand; opposed, remain seat ed. Since you have, by the time of your election, finished studying this book, you understand why taxation is theft. You decide to vote no; and, following the Speakers instructions, you remain seated. You havent moved; but you have voted, just as much as if, ignorant of sound economics, you had stood up. To reiterate, though, most of the actions that well be studying do involve physical movement. Well, we have our initial axiom; and the next step appears obvi ous. As promised, we must deduce conclusions about economics from it. But something has been left out. Recall, we must have a true initial premise in order to be sure that the conclusions we draw from it are true. So far, all that I have done is to state the axiom, and say a few things about it. But is it true? Unless it is, were in trou ble, for the reason already stated. Fortunately, the problem is easily solved. Isnt it obvious that the axiom is true? When I explained the axiom, I deliberately picked examples such as walking and reading that we all do. You wouldnt be reading these words now, unless you were acting. Once you think about man acts you will see that it is silly to doubt it. (If 20 An Introduction to Economic Reasoning IS THE AXIOM TRUE?
you think about the axiom but dont see that its obviously true, you would be probably better off to drop economics and take up sociol ogy instead.) The action axiom, then, is a common-sense truth. And this is enough to get the science of economics going. In this respect, eco nomics differs from chemistry, biology, and (most of) physics. In these sciences, we usually need to experiment in order to find things out. It isnt an obvious, common-sense truth that a molecule of water is composed of two hydrogen atoms and one oxygen atom. This was something scientists discovered only by careful testing. Not everything in the physical sciences rests on experiment. The ancient Greeks identified a body in the sky which they called Hesperus, the Morning Star. They picked out another body, Phosphorus, the Evening Star. Careful observation showed that the two bodies are identical. The Morning Star is the Evening Star is part of astronomy, but it didnt require experiment to estab lish. Nevertheless, it isnt a common-sense truth: careful observa tion was needed to discover it. In the physical sciences, you can sometimes get the wrong results if you rely on common sense. What could be more obvious, for example, than the fact that the sun moves round the earth. Of course the Earth is stationary. Use your eyes! a character in one of George Bernard Shaws plays remarks. But in fact (or so at least modern astronomers tell us) the earth is moving at an enormous rate of speed. Common sense does not inform us of this, and com mon-sense observations dont refute it. If the earth were moving, wed all fall of f is not a good reason to doubt that the earth moves. This suggests a problem. If, in the physical sciences, commonsense observations can turn out to be false, why not in economics as well? Perhaps the action axiom, however apparent its truth, will one day be shown false. Have we started down a false trail? You will be glad to know that we havent. Why do commonsense judgments about the physical world sometimes turn out to be mistaken? This involves difficult issues in the philosophy of science; Chapter 2: Action and Preference, Part 1 21
22 An Introduction to Economic Reasoning ? but, basically, the answer is straightforward. In the physical world, there is an underlying level of things not directly open to observa tion. Common sense can tell you how the world is on the surface: it does not disclose the worlds inner structure. But human action isnt like that. There is no underlying level for human action, in the same way that there is for the physical world: What you see is what you get. Since we act ourselves, we grasp the nature of action directly. We dont have to guess at the inner structure of thought. Physical objects consist of atoms, but there arent atoms of thought. 1. Yes, there are too atoms of thought! The brain has an inner structure, just like any other physical object. And the mind is the brain. Therefore, there are atoms of thought. Evaluate this objection. (If you can show whats wrong with it, youre a ringer.) 2. Look up Newtons first law of motion. How does this con tradict common sense? You might think that economists would be glad to have a com mon-sense foundation for their discipline. But some of them are not. In contrast to the Austrian School, which fully accepts the deductive approach, many economists think that it is unscientific to rely purely on deduction. Deduction plays an important role in eco nomics, no doubt; but premises ought not to be accepted just because they are held self-evident. Rather, what is important is the conclusions which these premises imply. These must be subject to test. Whether the premises are self-evident or even true matters little; only predictions count. As we shall see, Austrians reject this view.
A basic principle of economics, one well be studying soon, is the law of demand. Instead of showing how this law follows deduc tively from common-sense principles, some economists have conducted surveys to find out whether the law holds. They ignore the fact that, if the law has been correctly deduced, it rests on a much firmer basis than conjectures derived from polls. Now that we know the action axiom is true, we can return to the main business of deducing theorems from it. There isnt any thing difficult or unusual in doing this: using a common-sense point of view, we shall look at the concept of action and see what we get. For one thing, every action has a goal or purpose. Why, for example, are you now reading this page? Because you want to find out what were attempting to communicate. (Why you want to do that is of course another question.) Again, when you walk across the classroom, you do so in order to arrive at your destination: you want to go from Point A to Point B. (Back in the Dark Ages when I went to school, I would have used the example of walking to school: but of course no one would do so odd a thing today.) And what in turn follows from your having a goal? Obviously, you havent already obtained the goal: otherwise, there would be no need to act. If you were already at Point B, there would be no need to move there. (Indeed, you couldnt move there. You might stay there, but that would be a different action.) But a goal by itself does not suffice for an action. Let us return to the case of moving from Point A to Point B. It is such a thrilling example that one can hardly do otherwise. Suppose you are now at Point A. You would like to be at Point B, but you have no idea how to get there. (Its all the way across the room! What am I supposed to do?) You so far havent done anything. In order to act, you must do something to get what you want. You must, in other words, use Chapter 2: Action and Preference, Part 1 23 MORE ABOUT ACTION
24 An Introduction to Economic Reasoning ? means to achieve your goal. In this case, of course, walking across the room is the means to obtain your goal of being at Point B. 1. Give a few examples of acts that you have done. Identify the ends and means in each. 2. Here is a difficult problem we wont be able to cover in this book that you might like to try your hand at: In order to obtain an end, you have to use means. But using means to achieve an end is itself an action. In walking across the room, e.g., I move my legs in a certain way. But, if using the means is an action, doesnt that action require the use of a further means? If so, doesnt an infinite regress result? How, then, can action take place at all? (If you find this question unintelligible, feel perfectly free to ignore it. Better yet, ask your teacher if he can answer it.) We now understand the basic structure of an action: the use of means to obtain an end. In turn, the question arises, what can we deduce from this? (You can begin to see how economics develops: from what we already know, we attempt to deduce more and more.) What must be true if there are ends and means? Suppose you thought that, regardless of anything you did or didnt do now, you would wind up at Point B. Then, it would be pointless for you to start walking. Why walk if you are going to get there anyway? (Assume that walking wont get you there faster than doing nothing.) Or, suppose you thought your legs would start moving automatically. There would again be no point to setting yourself deliberately to move them. In order to act, then, you must believe that obtaining the goal is, at least in part, up to you. Sometimes this point is put in this way: it is a condition of action that the future is uncertain. But this can be misleading. It may just mean exactly what was said before; in order to act, you
cant believe that your goal will come about regardless of what you do. If so, of course, fine. But the future is uncertain may suggest something else. Perhaps what is intended is that in order to act, you must not know what is going to happen. (I think, in fact, that this is the more nat ural reading of the future is uncertain.) But this is a much stronger claim, and we have not at all proved that this is a necessary condition of action. Can you see why its a stronger claim? Well, the first claim, the one that we have argued for, is that in order to act, you must not know that the goal will come about, regardless of what you do. The new claim is that in order to act, you must not know that the goal will come about. The regardless of what you do clause has been dropped. And so far, at any rate, no justification has been offered for doing so. In fact, the stronger claim is false. Sometimes (though not always) we do know our goal will come about; and our knowing this is consistent with our acting to obtain the goal. How is this possi ble? Suppose you know that if you walk across the room, you will arrive at Point B. You also know that you are going to walk across the room. Then, why cant it be true that you know now that you are going to be at Point B? If you do know this, then in this respect the future is not uncertain. Dont say in response that there must be something wrong with the argument, because the future is uncer tain. This is just the issue in dispute. This may sound like much ado over a very small point. (Perhaps it sounds like this because it is much ado about a small point.) But we have emphasized it because the very idea of the future makes many economists go into a panic. They think that because human action is oriented toward the future, it is what they call radically uncertain. Actors, in their view, know next to nothing at all about what the results of their actions will be. As you can imagine, econ omists with this view are rather limited in what they can say: there isnt much room for a science of economics if ones only message is Chapter 2: Action and Preference, Part 1 25
26 An Introduction to Economic Reasoning PREFERENCE AND UTILITY ? that actors are ignorant. It is important, then, not to fall for the radical uncertainty line. 1. List something about the future that you know. 2. We dont really know the future. Suppose I think I know that Ill have ice cream for breakfast tomorrow. I always have ice cream for breakfast, and Im a creature of habit, so my claim to knowledge appears well-grounded. But it is false. After all, I might change my mind; or I might die dur ing the night, or untold other things might happen. Thus, I dont really know that Ill have ice cream tomorrow; and the future is indeed radically uncertain. Evaluate. Enough about radical uncertainty. Lets return to the structure of action. We have just learned that in order to act, you must not believe that your goal will be achieved, regardless of what you do. Can you think of a closely related belief that, if you had it, would prevent you from acting? You must not believe that your goal will fail to be achieved, regardless of what you do. Suppose we would like to be the next King of England. The job pays well, and its fun having people bow to you. I believe, however, that nothing that I can do can in any way secure my goal: Im just not eligible to be king, absent an unimaginable change in the Law of Succession to the Crown. My goal will thus lead to no action. An action, then, uses means to achieve an end. What follows from the fact that you are pursuing a certain end? Obviously, you want that end: you prefer having it to having something else. We return once again to our never-failing source of excitementthe move across the classroom from Point A to Point B. If you move
from A to B, would you rather stay at A or be at B? Even a gradu ate of a progressive elementary school should be able to cope with this one. You would rather be located at B; otherwise, you wouldnt move there. Another way of putting the point is that when you act, you think youll be better off after you obtain your goal than you would have been without it. Economists like technical terms; so instead of saying that when you act, you think that you will be better off, they usually say that you think your utility or welfare will increase by acting. It is crucial for your understanding economics to realize that this is just a restatement of the previous point; we havent added anything new by the claim that in acting, you think your level of utility will increase. All you have said (to go over the point once more) is that you prefer getting your goal to not getting it. Why are we pounding you over the head with this? Because there is a mistake that is very easy to make here. Some people think that whenever you act, you are trying to maximize pleasure and min i mize pain. What does this mean? There are some feelings or sen sations that people tend to like; imagine how you would feel, for example, if you were right now eating a banana split instead of studying the concept of utility. Or imagine how you would feel if you saw the person you most hate in the world carried away in a fly ing saucer. Other feelings of course, most people try to avoid. Very few people seek out red-hot stoves to touch; and not many would emu late King Enrique el Impotente of Castile, the father of Queen Isabella, in seeking out the smell of burning leather. According to psychological hedonists or egoists, who hold the view about action just described, maximizing pleasure and mini mizing pain are our only real goals. All actions, on this view, are means (ultimately) to increase pleasurable sensations or decrease painful ones. If we move from Point A to Point B (surprise!), we do so because we think being at Point B will better serve our happi ness. Chapter 2: Action and Preference, Part 1 27
There are other forms of hedonism that view the goal of action in somewhat different ways, but this form (crude or hardline psy chological hedonism) is sufficient for our purposes. Having explained what psychological hedonism is, we are now ready to deal with the mistake about utility and welfare to which I earlier referred. When we say in economics that an actor thinks that obtaining his goal will increase his utility, we are notrepeat not committing ourselves to psychological hedonism. By this point you should be able to explain what an increase in utility means in eco nomics. All that we are saying, as economists, is that an actor prefers securing his goal to not obtaining it. Utility and welfare do not designate particular ends, such as sensations of various kinds, to which our ordinary goals are means. It is a fallacy to take welfare and utility as if they did designate particular sensations. Economists who do so think of utility as a substance that we always attempt to increase. We are, on this view, always saying to ourselves, More utility! 28 An Introduction to Economic Reasoning UTILITY AND WELFARE John Stuart Mill 1806 Jeremy Bentham 1748
Chapter 2: Action and Preference, Part 1 29 ? But why is the position a fallacy? I believe that psychological hedonism is mistaken, but I certainly have not shown that it is. The problem with the theory, for our purposes, does not lie in its (alleged) falsity. Rather, it does not follow from the concept of action. It is a psychological hypothesis about how people act. It has no place in the deductive science of economics we are attempting to construct. 1. Does psychological hedonism strike you as a plausible theory? How would you explain actions that aim to help other people, using this theory? 2. Does maximizing pleasure always lead to the same actions as minimizing pain? 3. Some philosophers, e.g., Jeremy Bentham and John Stuart Mill, adopted utilitarianism as an ethical theory. They held that one should try to maximize the happiness of as many people as possible (The greatest happiness of the great est number). Do you think that utilitarianism is a true theory of ethics? Once more we return to the concept of action. Each of us, in acting, aims to achieve a goal by the use of means. We must decide what means will best secure our ends. How can I get to Point B? Should I walk? run? drive? Questions about choice of means con stantly confront us. And choice is not confined to questions of means. The Danish philosopher Sren Kierkegaard said that purity of heart is to will one thing. Perhaps he is right; but in fact people have many differ ent ends at which they aim. We must choose not only between var ious means to achieve a goal, but also among goals. Will you spend the next hour studying economics? Eating ice cream? (If I were you, I would pick the latter.)
One further complication. We not only choose between goals, and choose which means to use to obtain a given goal. Many means can be used to help achieve more than one end; we must decide which end each versatile means will serve. This economics textbook might be put to use as a doorstop: is this a good use of it, given your ends? Suppose that the textbook would make a better doorstop than the bust of your great-aunt that now reposes useless in your attic. You may decide to put your great-aunts head to use at the door, even though it is inferior to the textbook as a doorstop, if you wish to use the textbook for some other purpose. Action, then, involves complex choices among both goals and means. I hope that you have noticed something about this proposi tion that differs from the points about action we have previously made. It doesnt follow from the action axiom. Do you see why not? It is perfectly consistent with the axiom that each person engage in only one action, with a fixed set of means. (Remember the legend of Sisyphus, who spent his life pushing a rock up a mountain?) Stop! Hasnt something gone wrong? We are supposed to be developing a deductive science of economics, but we have intro duced propositions that dont follow from the axiom. What is to be done? Must we give up economics as a deductive discipline? Not at all. Economics is still deductive; but we must introduce a few extra principles besides the action axiom. Once we admit these, we can then proceed in the same deductive fashion as we have so far done. Only now we have more premises to work with. The extra principles that we now need are these: (1) People have a variety of goals; and (2) There are a variety of resources or means by which people can pursue these goals. But how do we know these principles are true? You will recall (and if you dont your teacher will remind you) the big problem we discussed at the start of this chapter. If we dont start with true principles, then we have no guarantee of the truth of what is deduced from them. How, then, do we know that our extra principles are true? 30 An Introduction to Economic Reasoning
Chapter 2: Action and Preference, Part 1 31 ? Some Austrian economists would contend that I have taken a wrong turn in the last few paragraphs. We could understand the action axiom in a broader sense. Action, in this extended sense, necessarily involves a variety of goals. Simple repetitive action, it might be argued, isnt really action. To act, you must decide how to allocate a means between competing ends. If this view is right, then the extra principles are really part of the action axiom. But, Im not sure that this view is right. What do you think? In exactly the same way that we know the action axiom is true, we know the extra principles are true. They are obviously true, common-sense propositions. It is not a conjecture, to be confirmed by careful experiment, that there are a variety of resources. Its something of which we are certain. 1. The action axiom is a necessary truth. Are the extra prin ciples necessary truths? (You might find it helpful to look again at Chapter One.) We have different goals. How do we choose between them? Should I now move from Point A to Point B, eat a gallon of ice cream, or toss this book out the window, assuming that I would like to do all three? The time available, we assume, allows me to do only one. The answer, Im afraid, sounds trivially obvious. You rank the goals: which, of the three, would you most like to obtain? (Guess which one I would pick!) Having done so, you act to achieve your most highly-valued goal. As usual, we have to avoid a false step. We are not saying this: you measure the goals on a numerical scale of satisfaction, and then
32 An Introduction to Economic Reasoning Lionel Robbins 1898 pick the one that scores highest. Eating ice cream gives ten units of satisfaction, while tossing the book out the window rates only a three. (Moving to Point B is only slightly above the vanishing point.) This approach, measuring the goals on a scale of satisfac tion, and picking the top scorer, is our old friend psychological hedonism. This is a speculative theory whose truth we do not assume in Austrian economics. But if we rule out measurement on a scale, how can we rank our goals? Easy: we do it as follows: first goal, second goal, etc. We use an ordinal, rather than a cardinal ranking. Compare the follow ing: Mount Everest is taller than Mont Blanc, which is taller than the Hollywood Hills (ordinal ranking). Mount Everest stands x feet tall. Mont Blanc stands y feet tall (cardinal ranking). This should make the distinction clear. In this connection, the B ritish economist Lord Lionel Robbins compared utility to love. You can usually tell whether you love one person more than another, but you cant measure how much in definable units. Now, we know what kind of ranking we are looking for. But what determines how the goals rank? Which goal ranks first? The answer may prove a disap pointment to those in search of complicated theory: the actor himself decides which goal he
Chapter 2: Action and Preference, Part 1 33 ? ranks highest. He is the one who acts, after all; what counts in the explanation of what he does is his personal rank order of goals. In economics, preferences are subjective. 1. Some people believe that there are objective values in ethics. What does this mean? Is this view consistent with our statement that in economics, preferences are subjec tive? 2. You havent refuted the theory that goals are ranked car dinally on a scale of satisfaction. For all you have shown, goals are ranked this way. Evaluate. (In this connection, reread the discussion of psychological hedonism.) Im afraid we must now face another problem. We have said that an actor always chooses his most highly valued goal. But how do we know this is true? Suppose someone says, My second high est goal is good enough for me; Ill do that first. Is this incoherent? Is our claim that an actor always acts to secure his most highly val ued goal another extra principle, adopted because it is convenient and defended as obvious? Or can it be deduced from the principles we have already acknowledged? This question we shall address in the next chapter, where the discussion of action and preference con tinues.
Chapter 3 Action and Preference Part 2 THE HIGHEST VALUED GOAL 37 ? A s you will recall, the last chapter ended with a question. How do we know an actor always acts to secure his most highly val ued goal? Remember, in economics our aim (our most highly val ued goal) is to deduce important results from the action axiom. (What is the action axiom? Of course you know, but go back to the previous chapter and read the section on the axiom again.) Does it follow from the action axiom that an actor always will act to secure his most highly valued goal? Its quite easy to see the answer is yes. Suppose you have a choice between watching a wrestling match between Hulk Hogan and The Undertaker, on the one hand, and listening to Hillary Clinton explain whats good for us on the other. You would rather watch the wrestling match. What should you do? Obviously, you should watch the wrestling match. It wouldnt make sense for you to choose to listen to Hillary, given that you would rather have the alternative. (Remember, were not concerned in economics with what you should choose. Our problem is: given your preference scale, how will you act?) 1. The principle that you always act to secure your most highly valued goal is not obviously true. In fact, it is false. Id rather stay healthy for the next ten years than go to the
38 An Introduction to Economic Reasoning THE TAUTOLOGY OBJECTION movies. But I may choose going to the movies over doing pushups or other things that I believe will make me health ier. Why is this a poor objection to the principle? 2. Dont people often choose not to seek their highest valued goals? Suppose you can get an easy A on your next math test by copying the exam written by Norman Nerd, the student sitting next to you. (Norman always gets 100 percent on math tests.) You wont be caught because your teacher is nearsighted. You of course resist temptation, even though you want an A. (If you get one, you will receive $1,000 from your parents.) Arent you here refus ing to go after your most highly valued goal? We hope you spotted what was wrong with the last objection. If you think it is wrong to cheat on math exams (economics exams are of course another issue), then you prefer not cheating to cheating. If this preference outranks your desire to get an A on the test, then by not copying from Normans paper, you are getting your highest preference. True enough, you may not get an A if you dont cheat; but this is not relevant. Of course you want an A, but you want to be a non-cheater even more. Hence you dont cheat. Some writers who oppose Austrian economics use this answer to help launch another objection. If you say that you must prefer not cheating, since you chose not to cheat, they claim, then all you are doing is defining your highest preference as what you in fact choose. You arent saying anything new. We may put this objection a little more formally this way:
Chapter 3: Action and Preference, Part 2 39 THE TAUTOLOGY OBJECTION ANSWERED ? If (1) highest preference = what you choose then (2) you always choose your highest preference since (3) you always choose what you choose To prove (2), all you have to do is substitute what you choose for your highest preference as (1) says you can. You then arrive at the identity (3). But this is trivial: it tells us nothing. This objection says that a key Austrian claim is trivial. And the objection can be extended. Parallel arguments can be used to claim that other key Austrian principles tell us nothing new. It is thus far from trivial that we refute this objection. 1. Construct a parallel argument with the one given above that claims the action axiom is trivial. (If you need help, see the discussion of the action axiom in the preceding chapter.) 2. Construct a parallel argument for the triviality of any other of the principles we have so far discussed. 3. Are there any results we have so far arrived at that are not vulnerable to this objection? Essentially, any argument can be countered in two ways: we can find something wrong with the argument, or claim that the argu ments conclusion does not matter. The philosopher Morris Cohen summed this up in a memorable way. In reply to a student, he said: In the first place youre wrong; and, in the second place, even if you were right, so what?
40 An Introduction to Economic Reasoning THE TAUTOLOGY OBJECTION CONSIDERED FURTHER ? Both sorts of reply can be used against the tautology objection. First, the objection just isnt right. We did not define your highest preference as what you in fact choose. Rather, we claimed some thing importantly true about what you choosenamely you will select your highest ranking preference. But if we didnt define highest preference in this way, how do we know the principle is true? Well, the answer is so simple it is hard to explain in other terms: we just study the principle and see that it must be true. Why would you choose something other than your highest preference? 1. Many philosophers and economists dislike appeals to self-evident arguments. Why do you suppose they take this attitude? But suppose the objection is right. Then, our principle, you always act to get your most highly-valued goal is trivial, a tautol ogy. So what? Why is this a consideration against it? (Remember that a tautology is a statement, e.g., a definition, that is true just by the meaning of the words in it.) What do you mean, so what? A tautology is just playing with words! If our principle is trivial, is this not an extremely damaging point against it? This response confuses two senses of the term trivial. In the first, the term designates what is unimportant. If our principle, or other principles of Austrian economics, is trivial in this way, that is indeed a damaging criticism. But, taken this way, the objection fails. As well see in the rest of the book, the principle is not useless: it is crucial for the development of economics.
Chapter 3: Action and Preference, Part 2 41 MARGINAL UTILITY ? In the other sense of trivial, the word is just a synonym for tautology. We have argued that the principle is not a tautology; but suppose that it is one. Then, it would be trivial in this second sense. But it does not follow that it is trivial in the first sense. Some tautologies are important; others are not. Many philoso phers think that mathematics consists of tautologies. It hardly fol lows, if they are right, that mathematics consists of trivialities. The subject would be much easier if it did. 1. Give examples of tautologies that are trivial in the first sense. 2. What determines whether a tautology is trivial in this sense? Exactly how untrivial our principle is, we shall now see. Suppose you have five different goals, which you rank in this order: (1) drinking a glass of orange juice; (2) eating the whole orange; (3) stomping an orange into the ground; (4) eating an orange peel; (5) collecting all the pips in an orange to add to your orange pip col lection. (Remember you rank these goals ordinally; you are not measuring them using a common unit. Also, we assume that one complete orange is required to satisfy each of these goals.) Further, suppose you have only one orange. What will you do with it? The answer will be apparent to anyone except a hermeneu tician. You will use the orange for orange juice, since this is your most highly-valued use. Now, what if you have two oranges? Just as obviously, you will use the oranges for your first two most highly valued uses. The
? 42 An Introduction to Economic Reasoning more oranges you have, the lower you can go on your preference scale. Lets look at the same phenomenon from another angle. Suppose you have five oranges, which you intend to use for the five goals specified above. The oranges are equal in quality and service ability. Now, disaster strikes. Johnny Orangeseed steals one of your oranges, leaving you with only four. What do you do, as far as the use of the oranges is concerned? The answer is once again apparent. Your pip collection will have to do without the addition you hoped to contribute to it. Since adding to the collection is your least valued use, you will give it up first. Note that this is true regardless of which orange Johnny steals. Suppose, e.g., that he takes the orange you had planned to squash into the ground. You will then shift the orange from the pip collec tion to be stomped. Regardless of which orange is taken away, you will give up your least valued use. The unit of the good (in this case, oranges) that is devoted to the use you value least is called the mar ginal unit. As we shall see in the next chapter, this concept plays a crucial role in the explanation of prices. 1. Show that the explanation just given of what you would do if you lost one orange follows from the principle that you always select your highest valued preference. 2. The analysis just given doesnt work. It wrongly assumes that you have a list of preferences in your head before you choose. But in fact your preferences exist only at the moment of choice. Is this objection right?
You might object to our analysis in this way. We assumed that you could rank all five uses of an orange in order from first to fifth. But what if you cant? Suppose, for example, that you cannot make up your mind between eating an orange and stomping it into the ground. You are indifferent between these two alternatives. Then what will you do with your second orange if you have two of them? Your preference scale does not dictate a choice. Lets examine the situation more closely. You have one orange, out of which you have made orange juice. (This is your highest val ued use.) You now acquire a second orange but cannot make up your mind between your second and third choices. Should you simply go on to choice four, or, overcome with indecision, toss away the new orange? Certainly not. You would rather either eat the orange or stomp it than eat the orange peel (alternative four). As to tossing the orange away, then you would not realize any of your preferences. This would be an especially foolish thing to do. The comments just given rest on a brilliant analysis of the prob lem of Buridans ass, given by Murray Rothbard. Buridan, a great scholastic logician, imagined a perfectly rational donkey. The don key never acts unless there is sufficient reason to do so. He has a choice of eating one of two bales of hay, identical in all relevant properties. Buridan imagined that the donkey, unable to find a rea son to choose between the two bales, would do nothing and thus starve. Rothbard pointed out that Buridans account of the situation was incomplete. The alternatives facing the donkey are not just (1) eat bale of hay A, and (2) eat bale B. They include also (3) do not eat either bale and starve. Since, presumably, the donkey ranks (3) below either (1) or (2), he will not, as Buridan has it, choose (3). To Chapter 3: Action and Preference, Part 2 43 THE INDIFFERENCE OBJECTION
44 An Introduction to Economic Reasoning MORE ON INDIFFERENCE ? do so would involve a violation of our fundamental principle: an actor always prefers a higher ranking goal to a lower ranking one. 1. Look up the section on Buridan in Rothbards Economic Thought Before Adam Smith (Cheltenham, U.K.: Edward Elgar, 1995), and give a brief report on his work. 2. How might a supporter of Buridans argument reply to Rothbard? A chooser, then, faced with two alternatives that seem to him about the same must somehow make up his mind between them. He will, e.g., flip a coin to determine whether to eat the orange or squash it. And once he has chosen, his choice counts as a preference as much as an act based on the most ardent conceivable desire. You cannot demonstrate indifference in action: given two alternatives, you must pick one or the other. And of course it is action that we are concerned to analyze in economics. Indifference, then, plays no part in our discipline. But, you will object, what if, as in our example, you do not have a marked preference for either alternative? (Before continuing, see whether you can answer this objection.) The key to the problem, once more, brings in a point from the previous chapter. Remember, the scale of preference is an ordinal scale: we rank alternatives only as first, second, third, etc. We do not take the alternatives as containing more or less of some com mon unit. More generally, all we are concerned with is the fact of preference: the strength of the preference does not for our purpos es matter. Thus, a preference established by flipping a coin is still a
Chapter 3: Action and Preference, Part 2 45 ? preference. The psychological state in which you decide is irrele vant for us as economists. Because we do not use the concept of indifference in Austrian economics, we get a bonus. Mainstream neoclassical eco nomics relies heavily on indifference curves, Edgeworth boxes, and other complicated mathematical constructions that we do not have to bother with. Austrian economics is in this way much easier to learn than this rival system. 1. You can too demonstrate indifference in action! Flipping a coin to decide between two alternatives is just a demon stration of indifference in action. Evaluate this objection. We have shown that Buridans ass is not rational: if he were, he would choose not to starve (given that he prefers eating to starving). But, Buridan might object, what is his hapless donkey to do? He must have a sufficient reason to choose this bale rather than that one: and given that the two are by hypothesis identical in all rele vant qualities, he cannot do so. Perhaps then there is no rational alternative available and the paradox proves that in the situation described, there cannot be a perfectly rational agent. We suggest that the example does not show so drastic a conse quence. Rather, what it brings into question is the assumption that a perfectly rational agent must have a sufficient reason for deciding between two alternatives, under any description of these alterna tives. The donkey does not have to be able to come up with a rea son for choosing one bale over the other, in order to be rational. In this case, in fact, he would be irrational to waste time in a futile EXTRA-CREDIT MORE ON BURIDANS ASS
attempt to do so. (Dont worry if you find this section difficult: it is not essential and is included here just because the topic is interest ing.) Because demonstrated preference is so important in Austrian economics, lets return to it one more time. From the viewpoint of someone watching someone else act, every action shows a prefer ence. If I see you throw down this book in disgust, then I know that doing so is your most highly preferred alternative. From the outside viewpoint of another actor, the concept of indifference doesnt arise. All that one sees are particular actions, never a state of indifference. If we were to acquire more and more units of a good, we would put them to less and less valuable uses. Another way of saying this is that the usefulness, or utility, of the last unit of a good decreases, the more units of a good we have at a given time. This principle is the famous law of diminishing marginal utility. (The marginal unit, to repeat, is the last unit.) Unfortunately, some economists misunderstand the reasoning that establishes the principle of diminishing marginal utility. They think it rests on a psychological law, called the satiation of wants. Imagine that you have a sudden craving for ice cream. You accord ingly march off to your favorite ice cream store and proceed to gulp down one ice cream after another. Eventually, you will find that the joy of more ice cream wears off. If you keep eating ice cream, you will sooner or later reach a point at which you dont want any more. (People who work in ice cream stores, who can have as much ice cream as they want, often get thoroughly sick of it.) 46 An Introduction to Economic Reasoning DEMONSTRATED PREFERENCE ONCE MORE THE BASIS OF MARGINAL UTILITY
According to some economists, the lessening of wants explains diminishing marginal utility. As you get more of a good, you will derive less pleasure, or utility, from it. The nineteenth-century economist Heinrich Gossen, whom Werner Sombart termed a brilliant idiot, was one of the first to develop this line of thought. By now, you should be able to give the Austrian response. In praxeology, we are trying to deduce what follows from the concept of action. Satiation of wants, if true, is a psychological generaliza tion about people. It does not follow from the concept of action that your desire for ice cream will, after a while, diminish and fade away. Whether this law obtains is an empirical matter: to find out about it, we would have to investigate the preferences of various people through psychological analysis. If we did, we would find that the law of diminishing marginal utility often turns out to be false. You might find that you get more of a high from the second or third ice cream than from the first. (In my own case, diminishing satisfaction would set in only at a very much larger number, if ever.) In any event, psychological considerations of this sort do not con cern us in economics. Diminishing marginal utility follows from the praxeological principle that people satisfy their most highlyvalued ends first. It is not dependent on the results of any empirical investigations. 1. Look up the treatment of Gossen in Joseph Schum peters History of Economic Analysis (Oxford: Oxford University Press, 1996), and give a brief report about him. 2. What would the Chicago School economists say about the basis of this law of diminishing marginal utility? Chapter 3: Action and Preference, Part 2 47 ? Joseph Schumpeter 1883
We hope that you noticed that one comment made above about satiation of wants raises a problem. We said that you might get more enjoyment from a second ice cream than from your initial indulgence. Doesnt this contradict diminishing marginal utility, which tells us that the utility of the last unit of a good always decreases? No, it does not. Im afraid we must be repetitious once again. Wh at we have been considering are the uses to which an actor pro poses, at a particular time, to put different units of a good. These uses are ranked ordinally. (Arent you getting sick of my saying this? Youd be surprised how many people dont get it.) Psychological estimates of pleasurehow much of a bang you get out of particular acts of consumptiondont concern us at all. Lets apply this point to the ice cream example. Each time you face the decision to eat another ice cream, you obviously have two alternatives before you. (We assume that you dont have other uses for ice cream besides eating it.) At each time, you will act to satis fy your most highly valued preference. How satiated or full you feel may well affect what choice you make: but satiation is not directly part of the analysis of marginal utility at all. In fact, since by hypothesis there is only one use for each unit of ice cream, the example probably isnt a very good one to illustrate marginal utili ty. A better example would be one in which you had several dif ferent uses of the ice cream on your scale of preferences, in addi tion to eating the ice cream now: e.g., storing it, giving it to a friend, etc. With each additional unit, you will satisfy a less highly ranked preference. Of course, there is a complication. Your prefer ence scale might look something like this: 48 An Introduction to Economic Reasoning AN OBJECTION ANSWERED
EAT TWO ICE CREAMS EAT ONE ICE CREAM AND STORE ONE EAT ONE ICE CREAM STORE ONE ICE CREAM The alternative uses of the good do not have to describe quali tatively different uses. All you need for a preference scale is a spec ification of uses of a good. In this scale, two units of ice cream are treated, for the first two preferences, as a single use. What is crucial, then, is the uses to which you propose to put a good. These uses are subjective: they depend on your preferences. If you didnt have a preference scale like the one just given, but instead just considered each new decision whether to eat a new ice cream as a separate choice, then you would always be concerned with one unit of ice cream. (In suggesting that the ice cream case was not a good one to illustrate the diminishing marginal utility, we were assuming that the actor considered only single units of ice cream, with a single use. It is this fact that lops off the scale of preference.) It is important not to fall into fallacy here. Because the uses of a good depend on subjective preferences, and because these uses determine what you will consider relevant amounts of the good, it does not follow that the good itself is subjective. You have certain uses for ice cream. But ice cream is a real phys ical good, out there in the world. You dont create it by your act of preference. In like manner, two units of ice cream, are, for part of the scales of preference that I gave, the relevant alternative to be chosen. But this preference scale does not determine what Chapter 3: Action and Preference, Part 2 49 THE RELEVANT UNIT
50 An Introduction to Economic Reasoning EXTENSION OF MARGINAL UTILITY ? consti tutes a physical quantity of ice cream. That, once more, is a matter of fact. Some supposed Austrians, the so-called radical subjectivists, get this point wrong. They think that because preferences are sub jective, the good itselfthe object of the preferenceis also sub jective. This of course does not follow. A few goods are states of minde.g., particular feelings that one aims to induce; but most economic goods are physical itemsstuff, if you will. (Complications that arise with money and credit are here ignored.) 1. Examine Israel Kirzners account of property acquisition, in his Opportunity, Perception, and Profit (Chicago: University of Chicago Press, 1979), using the point made in the section above. Does the discovery of a new use for a good create the good? The section just given was rather complicated. Lets get back to something simpleoranges. In the example of different uses of oranges, we were concerned, of course, with a single good. All of our examples have so far been of this sort. But an actor usually does not have to decide on alternative uses of one good. He normally has a variety of goods at his disposal that must be assigned to varying uses. Given, say, that he has a choice between acquiring an orange, an apple, and a set of brass knuckles, what will he do? The answer is straightforward. He will put the alternative uses of all the different goods on a single preference scale. Faced with a
? Chapter 3: Action and Preference, Part 2 51 TWO KINDS OF EXCHANGE decision to acquire various units of different goods, he will in each case act to satisfy his highest ranking preference. For each good, the law of diminishing marginal utility will apply. As more units of a good are acquired at a given time, they will be assigned to less valuable uses. The example we have been concerned with so far involves only one person. We have spoken, e.g., of an individuals scale of prefer ences. This part of economics is called Crusoe economics, after the character Robinson Crusoe in Daniel Defoes novel. (Please do not call this Caruso economics.) Most economics, however, consists of studying actions that involve relations among two or more people. Here a distinction is crucial. One way you can deal with someone is by force or its threat. You want my giant stuffed teddy bear, so you grab it from me. Or you threaten to clobber me if I dont hand it over to you. In a relat ed way, you might use fraud to obtain what you want. You might tell me that you will give me a real bear if I hand over the teddy bear, when you in fact have no intention of doing so. As well see later, some parts of economics deal with force and fraud (the chapter on the monetary system will make this clear). But the main body of economics deals with voluntary, uncoerced action action that does not involve force, the threat of force, or fraud. 1. To see the complexity of coercion, have a look at Robert Nozicks article Coercion. This is available in his Socratic Puzzles (Princeton, N.J.: Harvard University Press, 1997).
52 An Introduction to Economic Reasoning MUTUAL BENEFIT FROM TRADE If an action among two or more people is voluntary, a crucial fact about it at once follows. Since an actor always chooses his most highly valued alternative, he will not voluntarily engage in an action unless he would rather do so than refrain. The preceding paragraph was too textbooky. Lets try again. Suppose I have an orange and you have an apple. I propose that we exchange our possessions: I will give you my orange if you will give me your apple. If I propose doing this, I would rather exchange my orange for your apple than keep my orange. If you accept, you would rather exchange your apple for my orange than retain your apple. For most purposes, we can assume that neither you nor I attach special value to the act of exchange as such. What each of us wants from our exchange are the goods he will get. If so, we can simplify the preferences in our case. I would rather have an apple than an orange and you would rather have an orange than an apple. In any voluntary exchange, the parties rank the goods exchanged in a dif ferent order on their preference scales. Suppose both our prefer ence scales looked like this: 1 ORANGE 1 APPLE Obviously, no exchange would take place. Suppose my prefer ence scale looks like this: 1 APPLE 1 ORANGE
Then, if you have the reverse preference, I have oranges, and you have apples, a mutually beneficial trade can take place. No volun tary trade will take place unless all parties to the trade expect to benefit. And to benefit from an exchange, the parties must order their preferences differently. As we shall see in the next chapter, these facts play a crucial role in explaining prices. Chapter 3: Action and Preference, Part 2 53
Chapter 4 Demand and Supply 57 ? L ong before now, you will have thought that this is a very strange economics book. Everybody knows that economics can be reduced to a pair of words: demand and supply. Yet we have so f ar said nothing about them. Is this book a fraud? In fact, we have not forgotten about demand and supply. (You probably guessed this if you read the chapter title.) These two con cepts indeed are vital to economics, but you will be able to under stand them much better now that you know something about utility. Lets return to our favorite example: suppose I offer you one apple in exchange for one orange. We know that I would rather have one orange than one apple: otherwise, it would be foolish for me to offer an exchange. Similarly, you prefer one apple to one orange. But we have so far left a key question without an answer. Why does one apple exchange for one orange? Why not one apple for two oranges? Or three apples for two oranges? (Obviously, the question we wish to pose is: why do exchanges take place in the real world at the ratio they do? The one appleone orange exchange is just an example we have made up.) 1. To reiterate, the problem is this: I have apples, and you have oranges. I prefer one orange to one apple, and you have the reverse preference. Each of us can benefit from an exchange. But what determines the ratio at which an exchange will take place?
58 An Introduction to Economic Reasoning The answer to our question may disappoint you. In the example, we lack enough information to tell at what ratio the goods will exchange. True enough, both you and I will benefit if we exchange one apple for one orange. But suppose you ask for two apples in return for giving up an orange? As long as you value apples, you will be better off with two apples than one. I, of course, would rather surrender only one apple, so long as I value apples. (Remember, I did not say that I dont value apples, but rather that I prefer one orange to one apple.) Your demand for two apples poses a problem for me. Would I rather have one orange than two apples? If I would, then I may accept your offer: if not, I will reject it. But, I may think, why should the terms of trade be shifted to your advantage in this way? Why not exchange one apple for two oranges? Or three? A crucial asymmetry arises. Consider any suggested exchange ratio. If you would rather keep what you have than trade under these terms, no exchange will take place. But, if you would rather have the good you are offered, it does not follow that an exchange will take place at that ratio. Confused? Lets try again. Someone proposes an exchange: 1 apple for 1 orange (You have oranges) If you would rather have one orange than one apple, no trade will take place. If you would rather have one apple than one orange, a trade will take place. But, the trade may not be at that ratio. 1 apple for 1 orange 2 apples for 1 orange 1 apple for 2 oranges 2 apples for 10 oranges
Chapter 4: Demand and Supply 59 ? All of these ratios are consistent with your preferring one apple to one orange. We cant tell just from this preference how many apples it will take to get one orange. 1. In the last sentence, why dont we need to add or how many oranges it will take to get one apple in order to be complete? 2. Give examples from your own experience in which you have traded one thing for another. If you traded one egg for one box of BB-gun pellets, would you expect exchanges of these items by your classmates to take place on the same terms? So far, economic theory hasnt told us much. We know that an exchange will take place if, and only if, both parties to it expect to benefit. Is that all? Fortunately, we can often go further. Lets get back to apples and oranges. It might turn out that you have a more detailed preference scale: 2 apples 1 apple 2 oranges 1 orange Lets also suppose that you have four oranges and zero apples. Lets further assume that whenever you have a choice between acquiring one apple or one orange, you prefer the apple. I have four apples and zero oranges. I now offer to exchange apples for oranges with you at the rate of one apple for one orange. Obviously, you will be better off trading all your oranges for apples at this price. (By price, we mean the amount of a good you must give up to obtain
60 An Introduction to Economic Reasoning ? one unit of another good that you want. It is vital to realize that price does not just mean what you as a buyer have to give up to get what you want. The goods that the seller receives are his price. Each party to an exchange is both buyer and seller.) Can we now say that you and I will trade apples for oranges on a one-forone basis? If you answered that this follows, you have not been paying attention. 1. See whether you can anticipate why we cant draw this conclusion about the ratio of exchange. 2. If you are given the apple price of oranges, show how you can at once obtain the orange price of apples. As you have no doubt anticipated, the case just given follows the same pattern as our earlier discussion. We know that, at a ratio of one apple for one orange, you will be better off (given your prefer ence scale) to trade all your oranges for apples. Its crucial to note the parentheses (given your preference scale). Remember, when you exchange, you are concerned with the marginal unit: would you rather have one apple or one orange? (We assume you are exchanging only single oranges and single apples.) As you add more apples, the value of each added apple tends to fall. (Remember the law of diminishing marginal utility.) In like manner, as you surrender oranges, you will have to give up more and more valuable uses for your oranges. The value of the margin al unit will tend to go up, as your stock of oranges goes down. Thus, the law of diminishing marginal utility plays a key role in fixing the limits of exchange. I have assumed that you always value
Chapter 4: Demand and Supply 61 ? one apple over one orange just to simplify the example. But, to return to our example, why should you accept the offered terms of exchange? Why not demand two apples for each orange? Remember, you value oranges: other things being equal, you will prefer to retain as many oranges as you can. 1. Sure, you can try for a better price. But then nothing stops the apple seller from trying to get a price more favorable to him. Given your preference scale, bargaining will tend toward a one-for-one price. Whats wrong with this response? Well, so what? We have made a fuss about describing your pref erences in more detail, but we seem to have made no progress. We still dont know what the price is. Will it help if my preference scale is filled in? Not in this example: 2 oranges 1 orange 2 apples 1 apple Here my preferences are exactly the reverse of yours. I will be better off if I trade all my apples for your oranges; and you will be better off if you trade your oranges for my apples; but we do not know at what price the exchange will take place. In this example, the ratio of exchange is indeterminate: any price that results in your getting all the apples and my getting all the oranges will make us both better off.
62 An Introduction to Economic Reasoning ? 1. Economic theory cant tell us what the price will be, in cases like this. How do you suppose the price is actually determined? 2. What is meant by calling someone a good bargainer? In cases of indeterminate pricing, how can you obtain the ratio of exchange that is to your best advantage? Again, you may ask: Whats the point? We still have not come up with a way to determine price. But bringing in your preference scale has told us something. We know how many apples you will exchange for oranges, at a given price. And sometimes, we can go further. Suppose the preference scales are as follows (As before, you start with four oranges and I with four apples): 2 APPLES 2 ORANGES YOU 1 APPLE 2 APPLES ME 2 ORANGES 1 ORANGE 1 ORANGE 1 APPLE Just as before, I will be better off trading all my apples for your oranges at a ratio of one apple for one orange, and so will you. (Remember, we are using as assumption here: you always prefer one apple to one orange and I always prefer one orange for one apple.) But suppose you are not content. You demand two apples for each orange. Since I would rather have two apples than one orange, I will refuse to sell you any apples at this price. We can thus get a limit to the ratio of exchange. The apple price of oranges will be below two. Our scales allow some room for bargaining, but less than in the pre vious example.
? Chapter 4: Demand and Supply 63 1. In the example, can we derive a limit to the orange price of apples? That is, if I demand two oranges for each apple, will I price myself out of the market? How about three oranges for each apple? Now matters become more interesting. (I realize this is not a strong claim.) Suppose that, while you and I have immersed our selves in apples and oranges, other pairs of your classmates have been doing so as well. (Havent they got anything better to do? They should be studying economics!) Each ratio of exchange of apples and oranges will depend on the preference scales of the two parties involved in it. Remember that the exchange-ratio may not be fully determined by these preference scales. If we confine ourselves to separate two-person exchanges, the prices are likely to differ. Suppose I despise apples and would, if necessary, give them away. Your classmate Billy Carter, who also starts with four apples, just barely is willing to surrender an apple in order to get an orange. It is likely that I will be willing to give you more apples to get an orange than Billy will give to his trading part ner, Colonel Kadaffi, for the same purpose. Now for the good part. What happens once all these prices become known? I have been willing to give up four apples to get one orange; but I find that your friendly classmate, the Colonel, asks only one apple in return for one orange. I will shift my busi ness to him. For similar reasons, though, he will shift from trading with Billy to trading with me (no doubt driving Billy to drink). Each person will shift trading partners until he can no longer secure a better price by doing so. In each market (an area in which buyers and sellers have ready access to each other and the various rates of exchange are known to all) a process of competition between peo ple anxious to secure trade will tend to bring about a single price for
each good. This is termed the law of one price and is a basic principle of economics. In real world markets, something else usually speeds this process of adjust ment along. Some people are good at spotting differences in exchange ratios. By taking advantage of these discrepan cies, they can secure gains for them selves. Suppose that someone, call him Arthur Arbitrageur, sees the difference in exchange ratios in the example just given. 64 An Introduction to Economic Reasoning ? Arthur, we assume, starts with apples and has no interest in exchanging any of them for oranges. (Oranges just dont do it for him.) He sees, though, that if he can somehow get his hands on oranges at the Colonels price, he is in luck. Once he does so, he can then come to me and exchange his oranges for apples. Suppose he starts with one apple. He exchanges it with the Colonel for one orange. He then button holes me and gets four apples for the orange he did not want for its own sake. He in effect has the use of a machine for transforming one apple into four. Alas for him he cannot use the machine indefinitely. Other peo ple will get into the act; and, in a way that we will examine in more detail below, a price will be established at which these gains cannot be obtained. These gains are called arbitrage profits, and persons who engage in them are called arbitrageurs. 1. Suppose I anticipate Arthurs scheme. I lower the number of apples I am prepared to offer for one orange. How will the law of one price be affected? 2. Suppose a market has no arbitrageurs. Will the law of one price still operate?
Chapter 4: Demand and Supply 65 ? We have sketched, in a general way, how a price is determined, given a number of exchangers, each of whom has a preference scale for various quantities of two goods. Lets look at the process in more detail. Before doing so, I must issue a warning: here those dread monsters, demand and supply curves, enter the scene. (Since I am ungeometrical to an acute degree, they will not long detain us.) Before doing so, though, we need to recall two principles: (1) you prefer more of a good to less; and (2) as you acquire more units of a good, you will put them to less valuable uses. (The second prin ciple is the law of marginal utility.) Now to the main business: given your preference scale, we can list how much of a good you will want at a given price. Here is an example: At a price of five apples per orange, you want zero oranges At a price of four apples per orange, you want one orange At a price of three apples per orange, you want two oranges At a price of two apples per orange, you want three oranges At a price of one apple per orange, you want four oranges 1. Construct a preference scale that is consistent with this list. 2. For any good you would like to acquire (e.g., a BB gun, a poster of Michael Jordan) construct a schedule of prices like the one above. Since this list tells how many oranges you want at each (apple) price, it is called the demand schedule for oranges. The example was just made-up; but we were not free to use just any numbers. All demand schedules must display certain general properties.
66 An Introduction to Economic Reasoning ? Why? Obviously, because the demand schedule is derived from a preference scale; and the preference scale must obey certain laws. (What are they?) If the preference scale must have certain charac teristics, this causes the demand schedule to have certain other characteristics. Put in another way; if a given demand schedule is possible, then there must be a possible preference schedule from which it can be derived. Some demand schedules do not meet this requirement. Therefore, they are not possible. 1. Sketch the argument type followed by the reasoning of the last paragraph. Is this form of argument valid? (Look at Chapter One for an explanation of what valid means.) Lets look at an example. Suppose this is your demand schedule: At a price of five apples per orange, you want five oranges At a price of four apples per orange, you want four oranges At a price of three apples per orange, you want three oranges Is this demand schedule possible? Well, what preference schedule would underlie it? It would be one in which the more apples you had to give up to get an orange, the more oranges you would want. That is, on your scale, as you surrender more apples in trade, the value of apples to you falls. If you have to give up five apples to obtain one orange, then you will give up twenty-five apples to obtain five oranges, since on your preference scale, at this price:
Chapter 4: Demand and Supply 67 ? 5 oranges 25 apples 1. Explain why this ranking must be part of your preference scale, in the indicated circumstances. But if you need give up only three apples to obtain one orange, you will want only three oranges. On your scale, at this price: 6 apples 5 oranges This ranking holds because at the indicated price you will not make the trade. You prefer three oranges to fifteen apples, at a three apples per one orange price, but no more. Thus, as you give up more apples, the value of apples falls. But this contradicts the law of diminishing marginal utility. As you gain more units of a good, the value of the last unit decreases, since you will put it to a less valuable use. Thus, as you lose units of a good, the value of the units you have left rises. Then, contrary to our hypothesis, as the price of oranges rises, you should be willing to give up fewer apples, not more. And there is an easier way to demonstrate that this demand schedule contradicts the law of diminishing marginal utility. As you get more oranges, they will be demoted to less valuable uses. Then, as you obtain more oranges, you should be willing to give up less for them. But, on the rogue demand schedule, you want more oranges
68 An Introduction to Economic Reasoning EXTRA-CREDIT SECTION ? the higher the price. That is, you are willing to give up more for an orange when you get more oranges. And this cannot be true. There is a much easier way to demonstrate that the assumed demand schedule is impossible. We first have the preference: 5 oranges 25 apples But we also have the preference 16 apples 5 oranges We thus obtain: 16 apples 25 apples But this is impossible, so long as oranges are a good at all. You always prefer more of a good to less. What is wrong with this argument? (Hint: How do you derive the last pref erence?) Even if the argument just given did show an inconsistency in the preference scale, this would not suffice to show a logical contradic tion. A preference is not an assertion; and it is not contradictory to hold inconsistent preferences. (Its usually not a good idea to do so, though.) If you prefer 5 oranges to 25 apples, but 16 apples to 5 oranges, at the same price, you commit no logical fallacy.
? Chapter 4: Demand and Supply 69 LAW OF DEMAND 1. Look up the discussion of intransitive preferences in Human Action We have gone to a lot of trouble, but the result of our inquiry can be summed up very simply. At a lower price, the quantity demanded will be greater. This is the law of demand. Now for that bitter pill, geometry. On a diagram with price and quantity demanded of a good as the coordinates, we can show what quantity will be demanded at a given price, and vice-versa. Apples per Orange Quantity: Oranges 1 2 3 4 5 5 4 3 2 1 X X X X X Figure 1. Price and Quantity
Here is an example: In this diagram, at a price of five apples, one orange will be demanded; at a price of four apples, two oranges, etc. If we connect the points, we obtain the famous demand curve: 70 An Introduction to Economic Reasoning Apples per Orange Quantity: Oranges 1 2 3 4 5 5 4 3 2 1 X X X X X You will see diagrams like this in practically all books about eco nomic theory. But one note of caution is necessary. The points have been connected just because it is often convenient for purposes of illustration to do this. People make pricequantity decisions only in response to discrete units of a good; thus many points on the curve do not represent actual preferences of the demander. The question, e.g., how many apples will someone give up for one orange plus an undetectably small part of another orange may have no answer. Figure 2. Demand Curve
Chapter 4: Demand and Supply 71 ? ? We have looked at things from the standpoint of the owner of apples who demands oranges. But what about the person who owns oranges and responds to this demand? He supplies oranges to the demanders. Just as we did for the demander, so we can draw up a supply schedule, e.g.; At a price of five apples per orange, I will supply five oranges At a price of four apples per orange, I will supply four oranges At a price of three apples per orange, I will supply three oranges The higher the price, the more oranges I will make available: this is an instance of the law of supply. 1. Why is the Law of Supply true? I hope you found the easy way to answer this question. You could go through the same complicated rigmarole I did earlier, bringing in the Law of Marginal Utility. But you dont have to. Once we know the law of demand is true, it follows that the law of supply is true also. My supply schedule for oranges fixes my demand schedule for apples, and vice-versa. If I will supply five oranges at a price of five apples per orange, then I will demand five apples at a price of 1 to 5 orange per apple. These are just two ways of stating the identical exchange ratio. 1. Work out the supply schedule for all the values of the demand schedule given in the example. 2. Give an example of an impossible supply schedule.
72 An Introduction to Economic Reasoning A supply curve can be drawn: Quantity: Oranges 1 2 3 4 5 5 4 3 2 1 X X X X X Apples per Orange The higher the price, the greater the quantity supplied. (The same warnings about the artificial nature of the curve that we men tioned earlier also apply here.) Demand and supply curves do not have to curve just like the ones we have drawn here. Sometimes demand does not change much as price goes down: Figure 3: Supply Curve
This is termed an inelastic demand curve. Chapter 4: Demand and Supply 73 Quantity: Oranges 1 2 3 4 5 5 4 3 2 1 X X X X X Apples per Orange Similarly, supply can be fairly non-responsive to price changes. And the opposite circumstance may also obtain. The quantity demanded (and supplied) may be very responsive to price changes. Here, a slight decline in price sharply increases quantity demanded; and a slight decline in price radically decreases quantity supplied. These are called elastic curves. Figure 4. Inelastic Demand Curve
74 An Introduction to Economic Reasoning Quantity: Oranges 1 2 3 4 5 5 4 3 2 1 Apples per Orange Figure 5. Elastic Demand Curve Quantity: Oranges 1 2 3 4 5 5 4 3 2 1 Apples per Orange X X X X X X X X X X Figure 6. Elastic Supply Curve
Chapter 4: Demand and Supply 75 Quantity 1 2 3 4 5 5 4 3 2 1 Price X X X X X ? 1. Give examples of goods for which the demand curve is likely to be inelastic (i.e., you wont want much more if the price goes down) and elastic (i.e., you will want a lot more if the price goes down). 2. Give examples of goods with elastic and inelastic supply curves. 3. Extra-credit: Can a demand curve be perfectly elastic? We wont be going into much detail about the curvature of the demand and supply curves. But if you forget all else, you need to keep in mind two fundamental rules: the demand curve cannot slope downwards to the left, and the supply curve cannot slope downward to the right. This can only be a demand curve, and Figure 7. Demand Curve
and this can only be a supply curve. 76 An Introduction to Economic Reasoning Quantity 1 2 3 4 5 5 4 3 2 1 Price Quantity 1 2 3 4 5 5 4 3 2 1 Price S P D X X X X X X X X X X X X X X Figure 8. Supply Demand Curve Now we can complicate matters in an interesting way. Suppose we put the demand and supply curve for oranges, as priced in apples, on a single diagram. Then, we might get something like this: Figure 9. Demand and Supply Curve
Chapter 4: Demand and Supply 77 ? Here the demand and supply curves intersect at point P. So what? Here quantity demanded equals quantity supplied. At higher prices, more will be supplied than is demanded. Since the supplier would like to sell his excess stock, he will have an incentive to lower his price. Similarly, at a price lower than the point of intersection, more will be demanded than will be supplied. Demanders would like to get more of the good than they are able to and will tend to bid up the price. Only at the point of intersection will there be no tendency to bid the price up or down. This point is called the equilibrium, or mar ket clearing, price. 1. In what circumstances will suppliers like to sell their excess stock, given that to do so they must lower their asking price? They will sell more units at the lower price; but they will gain less per unit. When will this be to their advantage? So far, we have given demand and supply curves for individuals my demand curve for apples, your demand curve for oranges, etc. But we can now apply a result that we reached earlier in this chapter. Remember our old friend Arthur Arbitrageur? (Actually, he is no more than a passing acquaintance of mine.) We showed that on a mar ket, a single price tends to be established: this is the law of one price. Do not be confused by the phrase law of one price. The law does not act as some mysterious entity that establishes a single price. Rather, the law is a consequence of competition. Because the
78 An Introduction to Economic Reasoning ? demanders compete by bidding for the same good, we can add their demands competition produces the law of one price. One fact that usually speeds up getting to one price is expecta tions. Buyers want to avoid excess demand, and sellers have a paral lel aversion to excess supply. They both will have an incentive to offer what they expect to be the market-clearing price. No law guarantees their expectations will be accurate; but, on a free mar ket, experienced traders tend to be good at their jobs. Because of this law, we can construct demand and supply curves that differ from those we have learned about. For each demander and supplier in the market, we have a demand and supply schedule. These schedules tell us how much a person will demand or supply at a given price. We can add together the demand and supply schedules to obtain total demand and supply schedules for the market. From these, we can derive demand and supply curves, just as we did for individuals demand and supply curves. Why can we do this? Since we know that all the exchangers will end up at the same price, we can treat the buyers and sellers as if they were all part of a single giant purchase and sale. These demand and supply curves differ in a crucial respect from the demand and supply curves we have previously studied. Individuals demand and supply schedules, the bases for drawing the curves, are determined by scales of preference. But there is no pref erence scale that corresponds to the sums of the demand and supply curves. The price is in fact close to the preferences of the marginal buyer and seller; but they are particular individuals. A preference scale corresponds only to the demand and supply of persons. 1. Construct some sample demand and supply schedules. Add these up and construct new supply and demand curves to fit the amalgamated schedules.
P 2 Chapter 4: Demand and Supply 79 Quantity 1 2 3 4 5 5 4 3 2 1 Price S 1 P 1 D 2. Extra-credit: See whether you can set out explicitly the steps in the justification for adding together the demand and supply schedules. Note that for the argument to go through, you must assume that peoples preferences do not change during arbitrage transactions. Now that we have explained demand and supply, you may be tempted to close this book. After all, economics is supply and demandisnt it?so what more is left? Do not give in to temp tation; you need to grasp a crucial fallacy. This fallacy is easy to fall into; but, fortunately, you can readily avoid it. The demand curve slopes downward to the right: if at a lower price, demand is greater. Perfectly true: but here lies danger. What is greater is the quantity of the good demanded. But an increase in demand may also designate a shift of the entire demand curve. A diagram will show this: Figure 10. Supply Curve Shift S 2
D 1 80 An Introduction to Economic Reasoning Quantity 1 2 3 4 5 5 4 3 2 1 Price (2) In the first diagram, the price has been lowered from p1 to p2. At p2, the quantity demanded is greater than at p1. But the demand curve, as a whole, has stayed constant; it is the supply curve that has shifted. In the second diagram, by contrast, the entire demand curve has shifted to the right, and the supply curve is unchanged. Note that this increase in demand results in a higher price, not a lower one. To avoid ambiguity, an increase in demand should be used only to designate a movement of the whole curve; the other change is one in quantity demanded. S P 1 P 2 D Figure 11. Demand Curve Shift To sum up in an easy-to-remember catchphrase: Dont confuse movement along the demand (or supply) curve with a shift of the entire curve.
Chapter 4: Demand and Supply 81 SUMMARY ? 1. Diagram the distinctions between (1) a fall in quantity demanded and a lowering of the entire demand curve; (2) a rise or fall in quantity supplied and the appropriate shift in the supply curve. (You knew this was coming, didnt you?) This chapter, I fear, has been rather long and tedious. If you remember only one thing in it, let it be this: Value is subjective. Individuals assessments of goods determine prices. In the next chapter, we shall see what happens to economics if this point is ignored.
Chapter 5 The Labor Theory of Value ? 85 T he discussion of the previous chapter generates a major prob lem. In the first part of the chapter, bargaining on price as sub ject to few constraints was presented. If you would rather have an apple of mine than an orange of yours, and my preference is the reverse, then an exchange will benefit us both. But, we found, little could be said about the ratio of exchange. It might be one apple for one orange, two apples for one orange, three oranges for one apple, etc. Almost all was left in darkness. But, later in the chapter, things seemed different. Here, deter mining the price appeared easy: you simply draw the demand curve, draw the supply curve, and see where they intersect. What could be easier? Do we have a contradiction? Lets have a closer look: 1. Apart from the results of bargaining by those actually engaged in an exchange, we cannot determine the ratio at which the items exchange. 2. Given the demand and supply curves of the exchangers, we can easily determine the exchange ratio: it is the point at which the curves intersect. 1. How about it? Is there a contradiction? Reread the dis cussion of the law of noncontradiction in Chapter One.
86 An Introduction to Economic Reasoning WHY THERE IS NO CONTRADICTION ? Fortunately for me, the two statements do not contradict each other. The first statement is categorical: it says that the ratio of exchange cannot be determined apart from the bargaining of the exchangers. The second statement, by contrast, is hypothetical: it says that if the demand and supply curves are given, then the price can be determined. This enables us to escape contradiction. So long as the if-clause of the hypothetical is not realized, both statements can be true con sistently. Lets go over this again. (If you dont need to, feel free to omit this paragraph.) The hypothetical says what will happen if the demand and supply curves are given. It does not say that the curves are given. So long as the curves are not given, the statement makes no claim about how easy it is to determine the ratio of exchange. Thus it does not contradict the claim that the ratio is undeter mined. 1. But if the if-clause is never realized, the proposition is always false. Therefore, you have escaped contradiction only by withdrawing one of the statements you first made. What is wrong with this argument? 2. What would you have to add to the two statements to gen erate a contradiction? 3. Give other examples of two statements that (1) appear to be contradictory; (2) but in fact are not, because one of them is a hypothetical whose if clause is not realized.
The solution to our paradox of course raises a new question. Why arent demand and supply curves given in the real world? To answer this is easy, once we remember how demand and supply curves are constructed. As you will recall, to get a demand or sup ply curve, you must first have a demand or supply schedule. Therefore, if the demand or supply schedule is not fixed, neither is the demand or supply curve. But we now face a new question. Why arent the demand and supply schedules given in advance of bargaining? To answer this, we must return once more to praxeology. Remember what our aim is as students of economics. We are attempting to derive propositions from the axiom of action that illuminate our subject. It does not follow from the action axiom that the demand and supply schedules must be fixed in advance. Perhaps you do know, before you start exchanging apples and oranges, how much of each good you will want at each price; but nothing requires this. Can you see how this last remark requires a modification of what has gone before? It is not entirely right to say either that the ratio of exchange is indeterminate or that it is never the case that the demand and supply schedules cannot be fixed in advance. Rather, what we should say is that nothing requires these schedules to be fixed, from the standpoint of praxeology. We can then main tain, once more from the standpoint of praxeology, both of the statements we have insisted on: (1) the ratio of exchange is indeter minate (according to praxeology); and (2) if the supply and demand curves are given, the price is determined. Another point reinforces our conclusion. Suppose you own peanuts, which you want to trade for my pictures of wrestling stars. (Im tired of apples and oranges, arent you?) You may (or may not) have in mind a schedule of how many peanuts you will offer for Chapter 5: The Labor Theory of Value 87 DEMAND AND SUPPLY CURVES REVISITED
pic tures of various wrestling stars. Either is consistent with the action axiom. Similarly, I may or may not have a schedule of pro posed trades in my mind. But you cannot determine, by praxeolo gy, whether I have such a schedule. If you have one, it does not fol low that I do; and if you do not, I may have one all the same. In Austrian economics, the preferences that we are concerned with are those demonstrated in action. If I offer one picture of Hulk Hogan for ten peanuts, then I prefer ten peanuts to one picture of the Hulkster; my offer shows this. The relative rankings of other combinations are, from the point of view of praxeology, irrelevant. What counts are the preferences actually expressed on the market: the others, like the flowers that bloom in the spring, tra-la/Have nothing to do with the case. Of course, you know whether you have a fixed preference scale, just as I know whether I have one. But neither scale is given, just by reasoning from the action axiom. From that point of view, one can just as well as assume that neither you nor I has a fixed scale of pref erences. Thus, all our talk of demand and supply curves is hypothetical. All that we are really given, strictly speaking, is the point at which the curves intersect: that is to say, the actual price in the purchasesale transaction. (A famous British economist, Sir Dennis Robertson, emphasized this.) If the curves are hypothetical, why use them? You should know the answer by now. Hypothetical reasoning is often extremely use ful in science; in economics it is indispensable. We so far have stressed that the curves are not really out there: fixed preference scales, we have learned, need not exist. But we must not push the point too far. Some economists think that preferences do not exist except at the moment of action. (James Buchanan, a Nobel laureate in economics, holds this view.) We are not committed to it. 88 An Introduction to Economic Reasoning
Chapter 5: The Labor Theory of Value 89 EXTRA-CREDIT SECTION ? There is a misunderstanding that is easy to fall into here. In fact, I fell into it myself. Fortunately, an eminent Austrian economist called this to my attention. Go back to the apparent contradiction on the first page of this chapter. Note that it concerns whether we can determine the rate of exchange to two commodities. If, as was argued above, an outside observer cannot determine this rate, it does not follow that the rate is indeterminate. Instead, it may be the case that the rate is fixed; but outside observers can not know this. The eminent economist who pointed this out to me contends that at the moment a trade takes place, the preference scales of all individuals involved are fixed. In his view, an individual may himself be unaware of his latent preference scale. Im not sure whether this is right: but the argument in the text does not exclude this position. Even if preference scales latently exist, we can only observe the results of bargaining. These scales are inaccessible. Can you see why not? Once more, praxeology does not require the denial of this position. The claim that preferences are not in the mind but are to be found only in behavior is a philosophical doc trine. Whether it is true is not our function as economists to deter mine. Once more, we want to know what follows from the action axiom. Controversial philosophical theories should be avoided. 1. Are market demand and supply curves also hypothetical? What argument shows this? 2. It doesnt follow that action is always demonstrated in preference. Sometimes you do things, even though you really dont want to. How would an Austrian respond to this contention?
90 An Introduction to Economic Reasoning Karl Marx 1818 The approach to price and value that we have so far discussed, the subjective theory of value, has been developed since the 1870s. (It was advanced in the Middle Ages and Renaissance, but fell into eclipse during the nineteenth century.) Some economists look at value in a different way: these are members of the so-called classi cal school, which includes Adam Smith and David Ricardo. In order to understand Austrian economics better, you will find it a big help to look at the classical doctrine. After we have done so, we shall then examine the radically different way Austrians look at the key element in the classical theorycost of production. We shall look at the classical theory in the form given it by its most controversial exponentKarl Marx, the founder of scientif ic socialism. He argued very systematically for his theory. We shall be able to use what we know already to help us see what is wrong with Marxs theory. And our examination brings with it another benefit. For much of the twentieth century, communist govern ments dominated a great part of the world. These regimes based themselves explicitly on Marxs theories. Wrong theories have an immense power to do damage. Adam Smith 1723 ANOTHER ECONOMICS?
Chapter 5: The Labor Theory of Value 91 THE MARXIST ABC s ? 1. Do a brief report on the life of Karl Marx. From what you can discover about his life, does he strike you as someone sincerely concerned with the welfare of humanity? You will find it useful to look at Paul Johnsons book, Intellectuals (New York: Harper Collins, 1990). 2. Identify the following and what they did: Friedrich Engels, Karl Kautsky, V.I. Lenin. As we have learned, to say that exchange ratios, or prices, are determined by supply and demand leaves us with much up in the air. The supply and demand curves depend on individual prefer ences: they are fixed only to the extent the latter are. Marx maintained that to be satisfied with this is the sign of superficial, vulgar, economics. The task of theory is to discover the laws that underlie economic behavior. He did not reject the subjective theory entirely. On one point, the theory was right. In order to have economic value, a good has to have utility. We wouldnt exchange apples and oranges (sorry they are back again) unless we valued at least one of these goods. If kumquats have no use to me, I will not trade for them. So much Marx admitted; he was not, for once, bereft of common sense. This fact enables us to see the fallacy in a common argument against Marxs theory. As well soon see, Marx explained the eco nomic value of a good by the labor-hours needed to produce it. But what if someone spent an enormous amount of time making mud pies? No matter how much time he spent laboring on the mudpies, they are worthless: no one wants mudpies.
92 An Introduction to Economic Reasoning WHY MARX IS NOT A SUBJECTIVIST ? This objection leaves Marx unmoved. In order to be valuable, a good must have utility, or as Marx and the classics called it, usevalue. Since mudpies have no utility, they are without economic value. This holds both for the Austrian and Marxist theories of value. 1. If Marx admitted that only things with utility had eco nomic value, then he is really a subjective value theorist too. What is wrong with this objection? The answer to our inquiry is straightforward. Marx thought that in order to have economic value, a good must have utility. So far, he and the subjective school are at one. But now, Marx parts company from Austrian economics. Once a good passes the utility test, sub jective value exits the scene. It has nothing more to do with deter mining the value of the good. Why did Marx take this step? Oddly, he did so because he fully realized a basic truth we have already learned about subjective value. Subjective values are ordinal: I can say that I prefer one orange to one apple, but I cant say how much I prefer it. I cannot say one orange has so-and-so many more units of utility than one apple. Further, it is impossible to compare my preference for oranges with your preference: we cant make interpersonal utility comparisons. Do you see why not? Each preference scale gives only the ordi nal rankings of one individual:
? Chapter 5: The Labor Theory of Value 93 ME YOU 2 oranges 2 apples 1 orange 1 apple 2 apples 2 oranges 1 apple 1 orange The question, how does my ranking of two oranges compare with your ranking of one apple? makes no sense. As we have defined preference, this question breaks the rules. But just here is where the problem lies, according to Marx. Because use value is subjective, it cannot be the basis of a science of value. The purpose of science is to come up with objectively true laws: subjective value cannot fill the requirement. Thus, out with it! 1. What basic error did Marx make about science in this line of reasoning? 2. Behaviorism, a movement in psychology, is analogous to Marxs rejection of subjectivism. Write a brief report on this movement. 3. Since Marx admits that only goods with use value have economic value, he has not banished subjectivism from his own theory. Thus, his theory fails by its own stan dards. How would Marx reply to this objection?
94 An Introduction to Economic Reasoning MARXS BASIC MISTAKE MARXS SOLUTION TO HIS PROBLEM ? How, then, can one arrive at a science of economic value? According to Marx, economic goods have another property besides use-value: exchange-value. If I own one apple, the apple not only meets certain wants of mine directly. It can be used to obtain other goods. Perhaps I can obtain one orange with it. (If I cant, many of this books examples will be ruined.) Exchange value, according to Marx, gives us the basis for a true science of value. Suppose one apple exchanges for one orange. Then, one apple = one orange. Here, to Marx, is the indispensable first step of science. 1. Using what you have already learned, identify the funda mental fallacy in Marxs reasoning. As I hope you have already spotted, the initial step of Marxs argument is mistaken. An exchange is not an equality, but a double inequality. If I trade one of my apples for one of your oranges, then I value one orange more than one apple, and you value one apple more than one orange. Otherwise, no exchange would take place. Marx might counter our objection in this way. Granted that there is a double inequality, this applies only to use value. But use value does not explain economic value. That task falls to exchange value, and here there must be an equality.
? Chapter 5: The Labor Theory of Value 95 MARXS ERRORS ABOUT SCIENCE This reply exposes another basic mistake that Marx made. He assumes, wrongly, that exchange value exists entirely apart from use value. In fact it does not. Why does an apple have an exchange value? Because with it, I can secure an orange. And the extent of that value depends on how much I want oranges, and how much you want apples. Exchange value comes from use value or utility: it is not some sort of mystical entity that exists in its own right. 1. How might Marx reply to this objection? How in turn would an Austrian respond? 2. What basic principles of praxeology does Marxs theory violate? Marx would probably respond to our point in this way: We are begging the question in favor of the subjective theory of value. But in fact we have not done so. We explained how exchange-value aris es from subjective-value. What justification does Marx have for conjuring up exchange-value as an independent entity? This has not been derived from the axiom of action. But is this a good objection against Marx? He, after all, makes no claim to be a praxeologist. Why should he be bound by that dis ciplines requirements? This line of defense, I am afraid, gives Marx no hope. Whatever his views about praxeology, he confronts a basic problem: he must justify his claim that exchange value exists apart from use value. And this he has not done.
96 An Introduction to Economic Reasoning BHM-BAWERKS CRITICISMS Marx might answer us this way: Youre looking in the wrong place. The justification for exchange value just is that it enables me to come up with exact laws of value. I dont need any other support for introducing the concept. Unfortunately for Marx, his attempt to derive exact laws of value fails. Lets go back to basics, i.e., apples and oranges. We have: One apple = one orange. According to Marx, this means that one apple is identical to one orange. But, obviously, an apple is very different from an orange. How then can Marx assert that they are identical? Nothing (or at least very little) was beyond Marx. He knew per fectly well that an apple is not identical with an orange: but there must be, he thought, some underlying entity in the apple and orange that is the same in both. Otherwise, there would be no equality: and without an equality, we could not derive laws of exchange. Very well, then: one apple and one orange contain an identical element. What is it? According to Marx, it can only be labor. One apple exchanges for one orange because the same quantity of human labor is required to produce each of them. Eugen von Bhm-Bawerk, an outstanding Austrian economist who also served as Austrian Finance Minister in the early twentieth century, subjected Marxs argument to withering assault. He devot ed two main works to Marxs economics: part of a chapter in his great treatise Capital and Interest and a separate short book called Karl Marx and the Close of His System MORE MARXIST MISTAKES
? Chapter 5: The Labor Theory of Value 97 ANOTHER FALLACY 1. Extra-credit: Give examples of other goods besides wine whose value doesnt depend on the labor required to pro duce them. 2. Marx argued that if there is an equality in an exchange, there must be an underlying identity that explains it. Was he right? Bhm-Bawerk pointed out an even more important fallacy in Marxs argument. Everyone knows that some people are much more efficient workers than others. You might be able to build a wooden bookend in a few hours, but it would take me several years to do it. Will my bookend be worth several times more than yours? Of course not! Economic value, then, does not depend on the labor time required to produce something. Eugen von Bhm-Bawerk 1851 Bhm-Bawerk located a gap in Marxs argument. Suppose we concede to Marx that there is an equality involved in exchange. And suppose we grant him that the equality entails an identity. Why does the identical ele ment have to be labor? Why cant the common element be something else? And labor seems an unpromising choice for the sup posed common element. The value of some goods seems clearly not to depend on the labor time needed to pro duce them. Bhm-Bawerk noted that wine often increas es in value the longer it is stored. The labor required to gather the grapes and turn them into wine contributes very little to the price of wine.
98 An Introduction to Economic Reasoning Marx knew this. But, as we have already sufficiently seen, he almost never gave up one of his pet theories.To meet the difficulty, he said that it was not the labor required to produce a particular good that determined its value; rather, it was the labor socially nec essary to produce items of that class. My bookend would not be unusually valuable, however long I took to construct it, because bookends typically do not require several years to make. Here Bhm-Bawerk launched his criticism. What determines whether the amount of labor is socially necessary? Sometimes, as in my bookend example, the answer is obvious: we dont use the work of an incompetent as a criterion. But often it isnt obvious what to count as socially necessary. Should we adopt the least possible time it takes anyone to produce something as the standard? If not that, what? Bhm-Bawerk noted that to solve this problem, Marx needed actual market prices. Socially necessary labor was the labor need ed to produce goods at the market price. Those who required more labor than this to produce a good were not performing labor that was socially necessary. Can you see the flaw in Marxs method? As Bhm-Bawerk pointed out, Marx has reasoned in a circle. He claims that the mar ket price of a good is determined by the labor socially necessary to produce it. He cannot then appeal to the goods market price in order to find out how much labor is socially necessary. And the identical fallacy infects a related part of the theory. How can the labor hours required to produce one hour of a good be compared with the labor hours needed to make a good of a com pletely different type? How can my labor on this book be compared with Michael Jordans labor on the basketball court? (And why does the result of the comparison have to place me at such a disadvan tage?) How do you compare a surgeons labor with a bricklayers? Unless Marx can arrive at a common measure of labor, he will not have a labor theory of value. He will be left with distinct types
Chapter 5: The Labor Theory of Value 99 A FINAL ANOMALY ? of labor, and he will be unable to explain how the ratio of exchange is determined when a good produced by one sort of labor is exchanged for a good produced by another. See whether you can guess Marxs solution. Thats right: he argued that the many different varieties of labor could indeed be reduced to a common measure. And how was this to be done? Why, by reference to the market prices of the types of labor, of course! (Fortunately, Im not going to explain the complicated way he tried to do this.) Once more, Bhm-Bawerk identified the fallacy. To use market prices to reduce the types of labor to a common measure blatantly reasons in a circle. The fallacy Marx commits is exactly the same as the one of which he was guilty in defining socially necessary labor. 1. Set out in detail the steps of the argument showing that Marx is guilty of circular reasoning in his account of measuring socially necessary labor. 2. Given the fallacies of Marxs theory, why do you think he advanced it? Couldnt he see the obvious difficulties of the theory? We have discussed a great many problems with Marxs labor theory. (If anyone says here, Too many, and at too great length the teacher should banish him from the classroom.) But suppose, for a moment, we put all these problems aside. What would then happen?
100 An Introduction to Economic Reasoning Strangely enough, we would still not have a theory that adequate ly explained price. And of this Marx was fully aware. He knew full well, and explicitly said, that goods do not in a capitalist econ omy exchange at their labor values! (His reasons, unfortunately, cannot be explained now because they involve parts of economics that havent yet been covered here.) The situation is almost too much to believe. Marx has gone to elaborate lengths to arrive at an allegedly scientific theory that will explain why goods exchange at the ratios they do. But his theory, on his own admission, does not do this. What gives? Marx answered as follows: true, the labor theory does not explain actual prices. But given labor prices, the theory can show how actual prices are derived. Thus the theory is vindicated: it does explain price after all. Once more Marx met his nemesis in BhmBawerk. In a way that we wont explain here, he showed that Marxs attempted derivation of real prices from labor values fails: the details just dont add up. Rather than go into the technical details of Marxs derivation and Bhm-Bawerks criticism, let us raise a more general issue. Suppose Marx could derive real prices from labor values. That is to say, suppose Marxs arithmetic was right: how much difference would this make? Marxs claim is that he can show what the laws of motion of capitalism really are. Others may linger at the surface: he will plumb the depths. But how does deriving one figure from another meet this exact ing requirement? An example will illustrate the problem. (Naturally, we return to oranges and apples): One orange exchanges for one apple In this circumstance, a 1:1 exchange ratio, the apple price of one orange is one apple. Given the apple price of oranges, we can
? Chapter 5: The Labor Theory of Value 101 at once derive the orange price of apples. But, in doing so, we have not shown that the apple price of oranges somehow underlies, is more basic than, the orange price of apples. To get a genuine expla nation, more than a numerical derivation is needed. As I hope you are convinced, the labor theory of value does not offer an acceptable alternative to the Austrian theory. 1. What notion of scientific explanation did Marx rely on in his theory? Do you think his view was correct? Why not? 2. Look at the first few chapters of Marxs Capital volume one, to get some idea of how elaborate his theory is. 3. How does praxeology respond to the issue of what consti tutes a genuine explanation?
Chapter 6 Price Controls WHAT GOOD IS ECONOMICS? INTERFERENCE WITH THE MARKET 105 ? L ong before now, you will probably have thought: Why bother with economics? In fact, some of you may have thrown this book aside. If so, get it back: well see in this chapter how econom ic theory helps us analyze policy issues. 1. Prices are too high. What do you think this common complaint means? 2. Wages are too low. How does this frequent statement relate to the previous complaint? Gasoline prices are outrageous: why not compel the oil com panies to sell more cheaply? After all, they make vast sums in prof it: its not as if cutting their gains will send their stockholders to the poorhouse. What will happen if, say, gasoline prices are lowered from $1.30 per gallon (the market price) to $1.00 per gallon? At the market price, every buyer can find a seller; and every seller a buyer.
106 An Introduction to Economic Reasoning ? Can you see from our previous chapters why this is true? One way to show this appeals to a special type of argument called a reductio In a reductio we assume that the contradictory of what we want to prove is true. We then show that this hypothesis leads to a contradiction. If so, the contradictory of our original hypothesis is true. Confused? You should be. Lets have another look: (1) We want to prove statement p. (2) We show that not -p leads to a contradiction. (3) This proves that p is true. 1. What principle of logic does a reductio proof depend on?
? Chapter 6: Price Control 107 WHAT IF BUYERS AND SELLERS DONT MATCH? We can use a reductio proof to show that at the market price, every buyer finds a seller and every seller a buyer. Suppose that at the market price of gasoline, $1.30 per gallon, there are more buy ers than sellers (not-p). More people want to buy gasoline at that price than can be supplied. What will happen? Obviously, the buyers will scramble to try to get the gasoline. This is why when there are price wars among gas stations, you usually have to wait in long lines. You will not be surprised to learn that people do not like to wait in line. Some buyers will then offer a higher price. What happens at the new offer? Fewer buyers will want gaso line at the higher price but more sellers will be willing to offer gaso line for purchase. Eventually, supply and demand will balance. 1. Extra-credit: which buyers will bid up the price? 2. The analysis given in the text does not work. In most market transactions, buyers do not offer a price. The sell er sets the price. Unless the seller increases prices, then, prices will not rise. Whats wrong with this objection? Show: (a) why the alleged fact that buyers do not raise prices is false; (b) why even if the alleged fact were true, the conclusion would not follow. 3. Super-extra credit Is the argument given in the text a strict reductio proof or just analogous to such a proof? If you can answer this question you are probably a ringer.
108 An Introduction to Economic Reasoning MARGINAL BUYERS AND SELLERS MARGINAL BUYERS AND SELLERS, CONTINUED A BASIC RULE OF ECONOMICS ? I have good news for you. If you have found the discussion of reductio proof confusing, you can understand the fundamental eco nomic principal without explicit reference to it. All you have to remember is this: if there are more buyers than sellers at a given price, the price will rise; if there are more sellers than buyers at a given price, the price will fall. The market tends to balance buyers and sellers. All right: if there are more buyers than sellers, buyers will bid up the price (just to keep your hand in, state the analogous propo sition that is true when there are more sellers than buyers). But which buyers will do this? Obviously, economic theory can not identify the specific buyers who will do this: it does not tell you that John Jones or John Elway will bid up the price. 1. Why not? Recall the discussion in an earlier chapter about praxeology. Economic theory deals in general proposi tions, not propositions about specific people. In economic history, we apply the general truths to specific situations by filling in the blanks. We thus use theory to help us understand history; but history and theory are very differ ent things. Economic theory, though, can tell us something about which buyers will bid up the price. Lets suppose that the price of gasoline is $1.00 per gallon and, at this price, more buyers than sellers exist.
Chapter 6: Price Control 109 ENTER THE VILLAIN ? Some buyers at the price of $1.00 per gallon will not be willing to pay higher prices. $1.00 per gallon is their limit. These are called marginal buyers. The buyers who offer higher prices will be those who are willing to pay more than $1.00 per gallon to get gasoline. As prices rise, marginal buyers are driven out. As you might expect, a quite similar phenomenon holds true for supply. Suppose that at a price of $1.00 per gallon, there are more sellers than buyers: more people are willing to sell at that price than are willing to buy. What will happen? (Before reading the next paragraph, see whether you can work out the analysis yourself.) At the price of $1.00 per gallon, we suppose, some sellers will not find buyers. Some sellers will be willing to sell at a lower price: they would be better off disposing of the gasoline at less than $1.00 per gallon, than not being able to sell all their gasoline at the high er price. Others, the marginal sellers, will exit the market. If they cannot get at least $1.00 per gallon, they dont want to sell gasoline. Once again, the market matches buyers and sellers. At the new, lower price, say 80 per gallon (why not? its my example and Im free to make up the figures), there are neither sellers nor buyers who cannot trade as they wish. 1. The marginal buyers and sellers, we have said, are those who, given an unfavorable small change in price, prefer not to trade. By what standard is this assessed? Who determines that someone would be better off trading than not trading? Unfortunately, the state sometimes refuses to let well enough alone. Suppose the state decides that the price of gasoline is too
110 An Introduction to Economic Reasoning CEILINGS AND SHORTAGES, CONTINUED ? ? high. It imposes a price ceiling of $1.00 per gallon. It is illegal to charge more than this for gasoline. The market price, we suppose, is $1.30 per gallon. What will happen? At the $1.00 per gallon price, more buyers than sellers exist. Not everyone who wishes to purchase gasoline can do so. The result is a shortage of gasoline. If the free market were allowed to operate, the price would rise until the market price was reached. At $1.30 per gallon, the number of buyers and sellers would be equal. 1. Extra-credit: Do cases exist in which a price ceiling will not cause a shortage? Oddly enough, the answer to the question just posed is yes. Suppose the price ceiling is higher than the market price. For exam ple, the market price is $1.30 per gallon of gasoline and the gov ernment imposes a price ceiling of $1.60 per gallon. What will be the result? Thats right, nothing at all. The price ceiling will not stop buy ers and sellers from reaching the market price. Thus, we can say that a price ceiling will either be useless or cause a shortage. 1. Why do you think that the government would ever impose a price ceiling above the market price?
Chapter 6: Price Control 111 YET ANOTHER COMPLICATION AND ANOTHER COMPLICATION ? As you have no doubt by this time discovered, I like complica tions. It is not always true that a price ceiling above the market price has no effect. Can you see why not? Buyers and sellers care not only about prices now, but also about their estimates of future price changes. Suppose I think that the market price of gasoline, absent government interference, will rise from its present $1.30 to $1.65. My expectations of the price change may influence how I now act. If I think that the expected rise will be blocked by the price ceiling, my course of action may well be different. Fortunately, you dont have to worry about this in introductory economics. There is another case in which a price ceiling will not cause a shortage. Suppose, as before, that the government imposes a price ceiling of $1.00, when the market price is $1.30. A possible state of affairs is that preferences shift, so that the number of buyers and sellers match at $1.00 instead of $1.30. In other words, the ceiling induces shifts in preferences that justify it. But we have only to mention this to see how unlikely this is to happen. Why would the governments action have this effect? Once more, we should keep the main point in mind, (while not ignoring the complications). A price ceiling will either be useless or cause a shortage. 1. Extra-credit: Can you work out a circumstance in which a price ceiling will induce a surplus (more sellers than buy ers, at that price)?
112 An Introduction to Economic Reasoning ETHICS CONTINUED EVEN MORE ETHICS THE ETHICAL POINT ? ? Price ceilings cause shortages; therefore, the government should not institute them. What could be more evident? Well, the premise is true; the conclusion (in the authors judg ment) is also true. But the conclusion does not follow from the premise. 1. Give other examples of arguments with true premises and a true conclusion, where the premises do not entail the conclusion. Note that in order to reason correctly, the con clusion must be validly deduced from the premises. But wait a minute. Doesnt the conclusion follow the premises? Surely, shortages are bad; and if a government program causes a bad state of affairs to happen, it is bad. Therefore, price ceilings are bad and the government ought to avoid them. 1. Using the previous discussion, can you see why the new argument does not show that the conclusion follows from the previously stated premises? The answer should be obvious. The new argument does not show that the conclusion, the government shouldnt impose price controls, follows from the original premises because we have added a new premise. What is it?
Chapter 6: Price Control 113 MUCH ADO ABOUT VERY LITTLE? ? Shortages are bad. It is this that enables us to move from premises to conclusion. In general, you need an ought statement in the premises to justify an ought judgment in the conclusion. A value judgment will also do the trick. 1. Give examples of value judgments. 2. Since value judgments are subjective, no ought state ments can be backed up by reason. Evaluate this claim. 3. Some philosophers deny that you always need an ought in one of your premises to get to an ought in the con clusion. Find out who some of these thinkers are, and give a brief account of their arguments. Why wouldnt their views require us to modify our conclusion about what fol lows from price controls cause shortages? Havent we made too much fuss over a very minor point? After all, who doubts that shortages are bad? Perhaps some misanthrope enjoys depriving others of the goods they want; but, barring excep tional cases such as this, arent we home free? Indeed, dont we have here a partial solution to the so-called fact-value gap? Just add an obviously true value judgment. Compare the following: (1) YOU DO NOT WANT TO DIE BY POISONING (2) THAT GLASS OVER THERE CONTAINS POISON (3) YOU SHOULD NOT DRINK THE CONTENTS OF THAT GLASS Premise (1) is a value judgment, but it is none the worse for that.
114 An Introduction to Economic Reasoning WHY WE ARE NOT HOME FREE ? Unfortunately, we have not yet arrived at a good argument against price control. Can you see the problem? From shortages are bad and price controls cause shortages, it does not follow that price control ought not to be instituted. Why not? Lets consider a parallel argument: (1) DENTISTRY CAUSES PAIN (2) PAIN IS BAD (3) DENTISTRY OUGHT TO BE OUTLAWED Obviously, something has gone wrong. Even though something has some bad results, it may still be worth doing. Its good conse quences may outweigh its bad consequences. Thus, few advocates of price controls will welcome shortages. But they may think that the badness of shortages is outweighed by the alleged good effects of lower prices. Or they may try to cope with the shortages by other means. An example of this strategy emerges in justifications of rationing. During wartime, consumer goods are in short supply. Some people think it is unfair to allow prices to rise; and to prevent shortages, the government issues ration books. You must have a ration card, in addition to the requisite money, in order to purchase what you want. 1. How did rationing work during World War II in the United States? 2. A useful technique to help analyze arguments is to con struct a parallel argument: Give some examples of this technique. 3. Is it unfair to allow prices to be bid up to the market price?
Chapter 6: Price Control 115 HAVE WE PAINTED OURSELVES INTO A CORNER? ? As you will long since have gathered, I support the free market and, as such, oppose price controls. But what am I now to do? It appears that our point against price controlsthey lead to short agesdoes not of itself suffice. Must opposition to price controls be classed as simply an arbitrary value judgment? One might in response elaborate a political philosophy showing that the judgment is not arbitrary. Fortunately, we do not have to follow this complicated path here. 1. Read Murray Rothbards, Ethics of Liberty (New York: New York University Press, 1998) How would the rights frame work elaborated in that book handle the morality of price controls? LUDWIG VON MISES TO THE RESCUE Ludwig von Mises discovered a way out. As he noted, those who complain that prices are too high do not think that shortages are a suitable price to pay for lower prices. They contend that prices can be lowered without shortages. And here economic theory shows them mistaken. Thus, we can say that price controls, from the point of view of its own supporters, fails to achieve its goals. It is thus irrational. Ludwig von Mises 1881
116 An Introduction to Economic Reasoning ? 1. How does Misess argument apply to rationing? (Hint: rationing is a measure to limit consumption.) 2. Why is it a strong argument against a view that it cannot secure the aims of its advocates?
Chapter 7 Minimum Wages and Wage Control A DIGRESSION ON EQUALITY 119 ? T his chapter is really unnecessary. If you studied the previous chapter on Price Controls carefully, this chapter will hold few surprises for you. But wages are such a hot topic that an extend ed treatment of the subject is needed. With prices, the usual complaint is that they are too high. With wages the case is different. They are too low: the rich get richer and the poor get poorer. You have no doubt heard of the alleged income gap. Is this a real problem? As we shall see, you have already learned enough to assess the economic impact of inter ference in wage bargains by the government. 1. Before reading the rest of this chapter, try to analyze the effect of minimum wage legislation. (Hint: does the fact that we are dealing with a price floorwages cannot go below a certain amountrather than a price ceiling change the basic points of our analysis?) This is an economics textbook, not a philosophy treatise much as Id like to forget it. But it will help you in your study of economics if you look at an often unexamined philosophical assumption. When people complain about the gap between the rich
120 An Introduction to Economic Reasoning MORE ON EQUALITY A POORLY-CHOSEN EXAMPLE ? ? and the poor, they take for granted that the ideal state of affairs is equality. We cant have absolute equality, most people concede, but we should get as close to it as we can without sacrificing too much in productivity. Arthur Okun, a leading leftist economist, speaks of an equality-efficiency tradeoff. 1. Why do people think that there is a tradeoff between equality and efficiency? Why cant we maximize both equality and efficiency? 2. Have a look at John Rawlss A Theory of Justice (Cambridge, Mass.: Belknap Press, 1999). This is the most influential book of twentieth-century political theory. Look up what Rawls says about the difference principle. But why is equality taken to be an uncontested good thing? You might think the answer is obvious. Suppose someone is homeless and starving, and a multi-millionaire passes him by in silent con tempt. Isnt this unfair? 1. Extra-credit: Can you apply a technique of argument you have already learned to help you analyze this example? A good philosophy example helps us understand exactly the issue in dispute. A bad example confuses us: it mixes together two or more different points.
Chapter 7: Minimum Wages and Wage Control 121 ? Remember, what we are interested in now is the (alleged) value of equality. An example that aims to show that equality is important should concern itself with equalitynothing else. By this criterion, the example about the millionaire and the beggar doesnt fare very well. Can you see why not? This example illicitly appeals to another moral view we may sharei.e., it is undesirable that people be very badly off. But even if we share this view, this does not show that equality is a good thing. To see this, we can change the example so that only equality is involved. Consider two people, a millionaire and billion aire. Is there an ethical problem just because the billionaire is immensely more rich than the poor millionaire? If you dont think so, what does this tell us about the importance of equality? 1. Theres no use arguing about equality. Its just a subjec tive value judgment that many people, especially those on the left of center, share. How would you respond? 2. We dont need to argue for equality. It is a self-evident truth, as a glance at the Declaration of Independence suf fices to show. Why do we need to justify equality through some further principle? Evaluate. What determines wages rates on the free market? A standard joke among economists is that the correct answer to any question about the subject is demand and supply. (As you can see, econo mists dont have very good jokes.) However poor the joke, the answer is perfectly apt. A wage is a price for labor services of a certain kind. (Remember, there is not one wage rate: each type of work has a separate price.) BACK TO ECONOMICS
? 122 An Introduction to Economic Reasoning THE MYSTERY UNVEILED Suppose that the market price for professional stilt-walkers is $10.00 per hour. (Stilt-walkers dont come steep.) At this rate, all those who want to accept employ ment at that price can do so; and all those who wish to purchase stilt-walkers services at that price can do so as well. Demand and supply balance. I hope youre not surprised. What happens if the government enacts a law that forbids stiltwalkers to be employed at less than $12.00 per hour? 1. What does happen? Can you figure it out? At the new price of $12.00 per hour, more people than before will want to be stilt-walkers. (Certainly, for $12.00 per hour, Id become a stilt-walker.) But some employers will no longer want to avail themselves of the stilt-walkers services any longer.
Chapter 7: Minimum Wages and Wage Control 123 ? EXCEPTIONS ? Which ones? Obviously, those who found the value of stiltwalkers just slightly higher than $10.00. Faced with the require ment that they pay $12.00 per hour, they will no longer find it worth their while to do so. These marginal buyers will bid the stiltwalkers a swift farewell. What then, is the upshot? At the new price, $12.00 per hour, more workers are willing to work than at the $10.00 per hour price. But fewer employers wish to purchase labor at this price. Supply and demand no longer balance. Put another way, minimum wage laws cause unemployment. 1. Extra-credit. Both here and in the previous chapter, Weve spoken of marginal buyers or sellers. These are people who just barely find a transaction worth making at the market price and will be driven out of the market should the price change in a way unfavorable to them. Is the use of this concept consistent with the Austrian claim that preference is ordinal and cannot be measured? We can come up with a few exceptional cases in which mini mum wage laws do not cause unemployment. Suppose that stiltwalkers earn $10.00 per hour, and the minimum wage is $5.00. It is safe to predict that this minimum wage regulation will have little effect on unemployment. 1. Draw a demand and supply curve for stilt-walkers, with $10.00 as the market wage. Show how a minimum wage of $5.00 will leave price determination untouched.
124 An Introduction to Economic Reasoning AN EXCEPTION THE MINIMUM WAGE RULE ETHICS ? Or will it? As you might have already guessed, theres an excep tion. The market for workers is affected not only by the prevailing wage rate, but by expectations about future wages. If an employer thinks that the market wage for stilt-walkers will soon fall to $3.00, he will make plans accordingly. If the minimum wage interferes with his plans, his demand schedule will alter. 1. Show why the exception isnt really an exception. (Hint: the minimum wage will have an impact on future demand.) 2. What about a minimum wage rate so low it has no effect on either present or expected wages? In general, then, we can say: a minimum wage will either be use less or will cause unemployment Once again, there is another excep tion: the minimum wage justifies itself by changing preference schedules so that the minimum wage becomes the market wage. But why should this happen? No, I cant stay away from philosophy for long; but, as we have already covered the essentials, we can be brief. The minimum wage rule does not by itself suffice to show that minimum wages are bad. It is a descriptive, not a normative claim.
Chapter 7: Minimum Wages and Wage Control 125 Further, to justify a negative verdict on minimum wage legislation, it is not enough just to add the non-controversial value-judg ment, unemployment is bad. A supporter of minimum wages could claim that the increased wages for some workers outweighs the unemployment of others. Once more, Ludwig von Mises offers a way out. Advocates of minimum wages do not characteristically claim that the advantages of higher wages for some justify unemployment for others. Rather, they claim that minimum wage legislation will increase wages with out causing unemployment. And this economic theory shows to be false. (If this chapter sounds like a repetition of the last chapter, you have learned your lessons well. If it doesnt, please reread the pre vious chapter.) MISES TO THE RESCUE AGAIN
126 An Introduction to Economic Reasoning THE ZONE OF INDETERMINACY ? 1. Were talking about human lives here! The economic principles that determine the price of ordinary goods and services dont apply to human labor. Evaluate. 2. Without minimum wages, employers would be free to pay starvation wages. Evaluate. 3. Why are minimum wages usually quite low? Why not a $20.00 per hour minimum wage? Some labor economists will say that the foregoing analysis is crude and oversimplified. (They would say that, wouldnt they?) We have assumed that the free market fixes wages at a certain point: above or below this point, there will be either shortage or surplus. But why assume this? Perhaps wages are fixed by the market in a zone, rather than at a point. Suppose that the market wage of stiltwalkers is $10.00 per hour. A minimum wage now requires that stilt-walkers be paid $12.00 per hour. Must unemployment result? Not necessarily. Suppose employ ers demand exactly the same number of stilt-walkers at $12.00 as at $10.00; and workers prove no more likely to practice nonsense on stilts than at the higher price. In other words, neither demand nor supply respond very much to small shifts in price. If so, the mini mum wage will not cause unemployment. Supporters of this view have not offered much evidence in its defense. Why assume that the labor market operates differently from other markets? We dont usually talk about zones of indeter minacy in the price of wheator, for that matter, of stilts. Why stilt-walkers?
Chapter 7: Minimum Wages and Wage Control 127 A COMMONLY MISSED POINT ? Further, if there is such a zone, why assume that workers will tend to come out at the low end of it? And, if they do, why is this a situation that requires state intervention? 1. Why does minimum wage legislation hit teenagers and minorities especially hard? 2. List various summer jobs that you have had. Would changes in wage rates have led you to change jobs? You may be thinking, as usual, hes making too much fuss over a point that isnt all that important. Perhaps minimum wage laws do cause unemployment. But, after all, most people earn substantially above minimum wage. Aside from teenagersand they surely dont matterminimum wages do not have that much impact. But this objection construes wages too narrowly. Your wage is not only the amount of money you get, but your total benefit pack age. If you have a pension plan, health insurance, paid vacation, etc., these are all part of wages. Why? Well, when you are considering a job, dont you take these into account? And when an employer offers you a job, he must calculate the cost of all of these benefits. In many cases, the government requires that employees be offered a certain benefit package. In the most famous instance, employers must contribute certain premium payments toward the employees Social Security account. These payments should be con sidered extensions of minimum wage legislation. Practically every one is affected by them, and by other governmentally mandated benefits.
128 An Introduction to Economic Reasoning LABOR UNIONS ? 1. For various jobs, list the components of the total benefit package. 2. Do you think that workers would prefer more choice in their benefit package, rather than have the government mandate what they must have? As usual in this book, government has been the villain. But another sort of pressure can raise wages for some at the expense of others. Suppose Sam Stiltwalker says: I dont think $10.00 per hour is adequate recompense for my services. I want $25.00. Well, he can say thisits a free countrybut if $10.00 is the market price, he will find few takers. Imagine, now, that Sam is a little smarter. He organizes a group of his fellow stilt-walkers and tells his employer, Unless you raise our wages from $10.00 to $25.00 per hour, we will strike. Sam has been too clever by half. Remember, at the market price, all those who wish to purchase labor can find sellers. Sam and his friends will quickly be replaced. They have priced themselves out of the market. Sams only hope lies in coercion. If he can prevent the employ er from hiring replacements, he has a much better chance of getting the wages he wants. Among ways that labor unions try to block replacements are legislation that forbids firing strikers and the use of force against replacements.
Chapter 7: Minimum Wages and Wage Control 129 ? 1. Read The Kohler Strike by Sylvester Petro (Chicago: Henry Regnery, 1961) for an account of labor unions in action. 2. Replacement workers are often called scabs. In whose interest is this pejorative language? 3. Why do you think labor unions usually support minimum wage legislation?
M uch of economics consists of going over what we have already learned before. The principal reason for this is not that this is an excellent way to learnthough that is true enough. Nor is it that I have little new to offerof that I am not the best judge. Rather, the genius of Austrian economics consists, in large part, in drawing out the implications of simple principles. To do this, one must con stantly revert to these principles. Chapter 8 Money: Part 1 THE ORIGIN OF MONEY 133
134 An Introduction to Economic Reasoning ? One of the most basic of these principles we have had contin ued occasion to stress. A trade will take place if it is mutually bene ficial to the parties. If I have three apples and two oranges and you have two apples and three oranges, what will happen if we each pre fer to change our fruit portfolios? (Arent you getting tired of apples and oranges? One of the best features of this chapter is that well get to talk about something else.) Suppose I would rather have two apples and three oranges; and, you, conveniently enough, want three apples and two oranges. If you and I exchange one apple for one orange, we shall each be bet ter off. Other things being equal, then, the trade will be made. So far, so good. But what happens if I want to trade one apple for one orange, but you do not? Selfish pomologist that you are, you refuse to surrender one of your apples. What am I to do? You might think the problem has an easy solution. Our princi ple tells us that a trade will take place if it is to the advantage of the parties engaged in it. If you do not want to give up an apple, the trade is not to your advantage. I cannot then claim by the principle that a trade will take place. I appear to be unable to get an apple from you. 1. We cant conclude that a trade wont take place either. All that follows is that one cant appeal to this principle to support the claim that a trade will take place. Whats wrong with this objection? 2. What is the difference between a necessary and a suffi cient condition? 3. Can you give a stronger principle of trade than the one mentioned in the text?
Chapter 8: Money, Part 1 135 INDIRECT EXCHANGE MORE ON EXCHANGE ? If you have answered the questions at the end of the previous discussion correctly, then you will realize that my quest for an apple seems doomed. Unless you would rather have one more orange and one fewer apple than you now have, you will not be willing to trade. Do you see why this is a stronger conclusion than our previous result? Before, we showed that the principle justifying tradeyou will make a trade if it makes you better offdoes not generate sup port for the exchange I want. Now we claim that unless both parties are better off, no trade will take place. A trade will take place, if and only if both parties expect to benefit from it. By now, it should be old hat to you to show why this stronger principle is true. Each person chooses the action, of those alterna tives available to him, that will maximize his utility. If a trade will not make you better off, then you will not engage in it. If it will (and you have no still better choice available), then you will make the trade. 1. Give examples in which If a, then b is true but b only if a is false. 2. Give examples in which b only if a is true but if a, then b is false. But how am I to get my apple? I must have it! I might attempt to ask someone else to trade with me, if you will not. Surely some one in
136 An Introduction to Economic Reasoning the class will be willing to part with an apple. (Remember the old motto, An apple a day keeps the textbook writer away.) But suppose that no one who owns apples is willing to exchange them for oranges. Does it follow that I cannot obtain apples through exchange? Surprisingly, it does not. What gives us our room to maneuver? Doesnt the principle given in the previous section rule out my getting apples through exchange? Can you find the loophole? The answer depends on a subtle distinction. From I cannot obtain apples by exchanging them for oranges it does not follow that I cannot obtain apples by exchange. This is a stronger conclu sion than the premise What if I can obtain apples by some other type of exchange? But, once more, how is this possible, given that no one who owns apples will part with them for oranges? Well, suppose that you will trade an apple for a copy of a booksay, Keyness General Theory (To make this example more realistic, we need to suppose that you would surrender only a rotten apple for this book.) Now, I have only to obtain a copy of the book and I can have my apple. (Obviously, if I owned the book already, no problem would arise.) Now, we face a new problem: how can I get it? Fortunately, someone who owns a copy of Keyness masterwork is willing to part with it in exchange for an orange. (Since its my example, I am free to postulate whatever preferences I want.) Once I obtain the book, I can next offer my copy of the book to you; and at last I shall obtain my coveted apple. You may object to the solution in this way. In order to trade one orange for one book, I must prefer having the book to the orange. (Why? If you cant answer even after so much repetition, your chances of passing this course are dim.) But suppose I dont like the bookin point of fact, I dont like the volume in question. Then, doesnt it follow that I wont make
Chapter 8: Money, Part 1 137 INDIRECT EXCHANGE CONTINUED ? ? the exchange? In that case, I cannot use the proposed solution to get the apple I want. If I had a copy of the book, I could then exchange it with you for one apple; but, given my dislike for the book, it appears that I cannot obtain one by exchange for an orange. I do like oranges. 1. See whether you can anticipate the next section. What is wrong with the argument just presented? When I said that I didnt like the book General Theory what did I mean? Basically, I mean that I do not value the book for its own sake. I would not give up an orange to get the book, if I had to keep the book And there exactly lies the flaw in the argument presented just before. I dont have to keep the bookI can use it to trade for something else, an apple. If I obtain a copy of General Theory I can get something I do want to keep. Thus, it is false that the book has less value to me than the orange, even though, just looking at the orange and the book by themselves, I would rather have the orange. If a good can be used to get other goods that I want, its value to me increases. In this way, other peoples preferences affect my own. Because you want a copy of General Theory and will give an apple to get it, the book becomes more valuable to me than an orange. 1. How does our analysis relate to the distinction that Adam Smith and David Ricardo made between use value and exchange value?
You can readily see why exchange of this kind is sometimes called triangular instead of a direct exchange like this: orange A B apple Figure 11. Direct Exchange We have two exchanges: C book A orange [book] B apple Figure 12. Two Exchanges 138 An Introduction to Economic Reasoning STILL MORE ON INDIRECT EXCHANGE
Chapter 8: Money, Part 1 139 LIMITS OF INDIRECT EXCHANGE ? (Note that our triangle does not require a further exchange between B and C.) Once given this basic pattern, more and more complicated pat terns can be constructed. Suppose no one who has a copy of General Theory wants an orange. Perhaps a book owner wants a waf fle iron, and I know someone who will exchange a waffle iron for an orange. I first exchange my orange for a waffle iron; next, I exchange the waffle iron for a copy of the book; and, at last, I exchange the book for the apple. 1. Construct some chains of exchanges. How complicated a series do you think could exist in the real world? 2. Consider the first indirect exchange. Cant my devious scheme to obtain an apple be thwarted by the book owner? All he has to do is exchange his book with the apple owner. What is wrong with this objection? You can have a lot of fun making up complicated chains of exchanges. (I dont think this is much fun; but, who knows? Maybe you do.) But you can readily see that people who try to use the indi rect exchange method to get what they want will encounter diffi culties. What are these? First of all, wherever you take a step in the chain, you must find someone who wants what you then have. This is of course a requirement of all exchanges: it is called the problem of double coincidence of wants. The more steps in a chain of trade you have to make, the more difficult this problem becomes.
140 An Introduction to Economic Reasoning THE PROBLEM OF INDIRECT EXCHANGE COMPOUNDED ? Further, at each step in the chain disaster threatens to strike. Suppose I miscalculate: I think, e.g., that if only I can get a statue of a pink hippopotamus, I can then secure a copy of General Theory enabling me at last to get the apple I want. Unfortunately for me, the owner of General Theory shrinks in horror at the statue; and I am stuck with it. Since I would much rather have an orange than the statue, I have lost out on the deal. But suppose I have calculated all the steps in the chain correctly textbook authors, after all, are immune from error. Have I then found a good way to get more of what I want? The matter is not so simple. Even if I line up a series of trades, making no mistakes in doing so, I cannot count the process one of pure gain. Setting up the pro cedure takes time and effort. This is called transactions cost. Against the gain I hope to achieve at the end of the process must be set the cost of engaging in it. 1. How is the cost in transactions cost to be assessed? 2. Since transactions costs are an economic bad, our aim, both as individual actors and policymakers, should be to minimize transactions costs. Whats wrong with this pic ture? To reiterate, there are two main first-level problems in indi rect exchange: the series of exchanges must be coordinated, and errors may leave you with goods you do not want. Even if you can solve these difficulties, your attempt to do so generates a secondlevel problem: you are confronted with transactions costs.
Chapter 8: Money, Part 1 141 TOWARD A SOLUTION ? One way to deal with these problems is to abandon indirect exchange altogether. But then you are limited to what you can get in direct exchange (or, of course, produce yourself). This is obvi ously a drastic limitation. The difficulties of indirect exchange suggest a related problem for direct exchange. If you produce something that many people want, e.g., apples, you will probably find it easy to make an exchange. But what if you produce something few people want? Suppose you are a violin maker, or a writer of economics textbooks. Then, you may have to search far and wide in order to solve the problem of double coincidence of wants. You may have extensive transac tions costs even if you engage only in direct exchange. 1. What is the problem of double coincidence of wants? (You should get it right this time.) 2. Given the problem of double coincidence of wants, why do you think people engage in jobs like writing economics textbooks? (Because they are stupid is not a good answer.) How do we solve all these problems? You have the material for an answer already to hand. Recall our earlier statement: if you pro duce goods like apples that many people want, you will find it easy to make an exchange. This should at once suggest a way around all our difficulties. Suppose you acquire goods that most people want. Then you dont have to worry about complicated chains of trade, and you have
142 An Introduction to Economic Reasoning IS OUR SOLUTION A PSEUDO-SOLUTION? ? reduced transactions costs. Also, if you produce something few peo ple want, you can solve the double coincidence of wants problem by the same means. Once you trade in your ability to write economics textbooks for apples or oranges, your troubles are over. 1. Evaluate this objection: The solution just suggested doesnt work. Of course, if you have goods other people want, you will improve your bargaining position. But why will someone with a good in demand surrender what he has for something few people want? The problem isnt solved at all. I hope you didnt make the mistake of failing to read the dis cussion question above. I cunningly put imp ortant points in these sec tions, as well as questions for review and application. This is one instance where I have done this. The objection raises two valid concerns. First, someone who trades a good more in demand as an instrument for further trade for one less in demand is, other things being equal, suffering a loss. But it does not follow that no such exchanges will take place. Rather, the person with the good more highly in demand earns a premium. If I want to obtain oranges in return for writing an economics textbook, I shall probably have to be satisfied with getting fewer than I would have obtained had more people been ready to take the use of my skill in exchange for what they want. The second valid concern raised in the objection is this. Someone who has a good not much in demand for further trade cannot conjure double coincidence of wants out of existence. Even
Chapter 8: Money, Part 1 143 HOW A MEDIUM OF EXCHANGE ARISES given our solution, he must still find someone who wants what he has for sale. And that person must have a good more in demand for further trade than his own. But if he can overcome this initial hur dle, he is on his way. A good like oranges thus has two components that determine its value: (1) its use to consumers and producerspeople who want to eat oranges, make virtual pets of them, hang them as wall decora tions, use them to make juice, etc. and (2) its use as a medium of exchange. The second use is a bit complicated, and it will be helpful to go over it again. Because oranges are much in demand for further trade, the value of oranges rises. One of the uses of oranges is that people think they can be used to get other things that people want. What happens if a good gains value because it is thought by most people to be in general demand of this kind? People will then probably expect that in the future, the good will be even more in demand, increasing its value even further. Lets look at this in more detail. At the start, t1 consumers value oranges for purposes of con sumption. Then, at t2 consumers who see that many people trade for oranges will value oranges more highly than they otherwise would have done. Next, at t3 consumers who see that even more people than before trade for oranges will tend to value oranges still more high ly than before. By this, I mean that they value oranges (1) more highly than they would have without considering the exchange value of oranges at all; and (2) more highly than they would have had they added only the exchange value of oranges at t1 to their estimation of oranges value.
144 An Introduction to Economic Reasoning ? If you found the previous paragraph convoluted, imagine how difficult it was to write it! You dont really have to worry about the details. What you do need to remember is the basic principle: A good that people think will be accepted readily in exchange will gain in value Imprint this on your brain. 1. How does the discussion in the previous few pages raise a problem for praxeology? Are all of the steps in the rea soning presented strictly deductive? So far, we know that some goods are more heavily in demand for trade than others. Because of this, these goods find their values enhanced. We can now go further. What happens when market actors see that some goods are more valued than others, in part because of the expectation that they will be highly valued? It seems likely that the goods in the highly valued class (oranges, apples, ice cream) will not be equally in demand for their use in further exchanges. Some will be more valued for this purpose than others. What will now happen? When people see that some goods are more highly valued than others, their demand as exchange goods will increase. This will be true even if the goods are only slightly more highly valued for exchange than others. If apples are expected to be even more in general demand than oranges, people will want apples rather than oranges. CONVERGENCE
Chapter 8: Money, Part 1 145 EXTRA-CREDIT SECTION: FURTHER PROBLEMS FOR PRAXEOLOGY PRAXEOLOGY AND CONVERGENCE ? 1. Evaluate this objection: What has just been said may be true, but it is not praxeology. According to praxeology, our conclusions have to follow necessarily from the action axiom, the subsidiary postulates, or conclusions drawn from any of these. This has not been accomplished here. Review the chapter on praxeology to help you prepare your answer. Contrary to the objection just suggested, the reasoning of our previous section conforms to praxeological law. (A good thing that it does, too, or I would be out of business.) Remember, we are con cerned here only with a goods exchange valueits use, as a good believed in general demand, to obtain whatever other goods I want. Given this fact, even small differences in expected exchange value count for a great deal. I shall always tend to choose, other things being equal, the good I think likely to have the highest chance of general acceptance by others. Otherwise, I shall not be choosing my highest valued alternative. And we have already shown that I always do choose my highest valued alternative. You will probably find it helpful now to review the discussion of alternatives and choices. (Teachers, please make sure your students act on this suggestion.) We are not yet out of the woods, as far as praxeology is concerned. How does it follow from the fact that in the indicated cir cumstances,
146 An Introduction to Economic Reasoning ? I shall always choose the good I expect to have the highest exchange value, that I shall choose the good that has had in the past the high est exchange value? And how do we know that goods must have dif fering exchange values? These are difficult questions, and in part too advanced for this book. 1. Solve the problems just discussed. Then mail the answers to me. Long before now, you have probably thought this is a strange chapter. It is supposed to be about money and banking; but so far, it seems, we have said nothing about these subjects. As you will see in the following chapter, however, we have taken the essential steps toward understanding this difficult topic. MONEY AND BANKING
Chapter 9 Money: Part 2 CONVERGENCE ONCE MORE 149 ? I n the last chapter, we argued that economic actors in search of a medium of exchange will tend to converge on a few goods. People who want to obtain goods that they think will always be accepted by others will tend to choose the same goods, more or less. Can we go further? What properties will the goods they select have? Here we take a temporary leave of absence from praxeology and engage in historical inquiry of a sort. We are asking: what properties does it seem reasonable to want in a medium of exchange? To put the question another way, what will people tend to choose as money ? We shall define money as a good almost universally accepted in a market for purposes of exchange If you want to exchange what you have produced at all, you will most likely accept money for it. 1. Must a good be universally accepted to count as money? Suppose someone will accept only a particular spider in exchange for his copy of General Theory and not the money to buy the spider he wants. Must we conclude that because of this person, money does not exist in his socie ty?
150 An Introduction to Economic Reasoning PROPERTIES OF A MEDIUM OF EXCHANGE Historically, all sorts of things have served as money, ranging from cattle to sea shells to sugar. In prison camps during World War II, cigarettes were used as money. But most societies that have allowed a market in money to develop have converged on gold and silver as the commodities used for media of exchange. First of all, the medium of exchange should be durable. Ice cream, however desirable, would not be a good medium of exchange because it is perishable. True, you can keep it in the freez er; but this is costly. And how would you carry it around to exchange it for other things?
Chapter 9: Money, Part 2 151 ? This leads to a related property that money is likely to have. It should be readily divisible into small units. Can you see why ele phants would not be a good choice as money? Suppose you want to buy a candy bar. How could you do so, if one elephant were the smallest unit of currency? Gold and silver, by contrast, can easily be cut into small units. (In countries on a gold or silver standard, met als of less value, such as nickel or copper, are often used for the smallest denominations of coin.) The third quality follows from our discussion in the previous chapter. The medium of exchange must have qualities that make it widely acceptable. The beauty of gold and silver has made these metals widely desirable in a great many societies. To sum up, with a free market, we may expect gold or silver (or both) to be adopted as the medium of exchange. 1. Give examples of different commodities that have been adopted as money by various societies. 2. Why do you think that many writers have criticized the desire to amass gold? (Murray N. Rothbard and Dr. Joseph Salerno have termed this phenomenon aureophobia.) Austrian Hundert Schilling
152 An Introduction to Economic Reasoning MONEYS EFFECT ON OTHER GOODS MONEY AS A STORE OF VALUE ? We have now completed our first historical excursion. We shall assume that a society has adopted gold as its medium of exchange; and, proceeding by praxeological reasoning, ask what follows from this fact. One advantage of a gold (or silver) standard follows at once from one of its physical properties. Because gold is durable people who own it need not make their exchanges all at once. If I own gold, I can save it until I find something that I want to buy with it. As we have seen already, a medium of exchange extends our abil ity to obtain different goods. If I wish to trade economic textbooks for ice cream (Im sick of apples), I must find an ice cream owner who wants a textbook. If I have gold, I have the much easier task of find ing an ice cream owner who wants gold. And of course the task is much easier in large part because he wants the gold so that he can buy the things he wants. (Have I repeated this idea enough times yet?) Now we see that the gold not only extends the space of goods available to me. It also extends the time in which I can purchase them. In doing so gold acts as a store of value: this is one of the main functions of money. 1. Extra-credit: By extending the time in which someone can purchase goods, how does gold also extend the space of goods available? Notice that time is used literally here but space figuratively. As always, lets review. We started with direct exchange: I trade one orange for one apple. From this we moved to indirect
? Chapter 9: Money, Part 2 153 exchange. Since you dont want my orange but do want a copy of General Theory, I trade my orange for the book and then trade the book for the apple. Goods in general demand for further trade, we saw, will have their value enhanced by their being perceived to be in wide demand. People in a market society will tend to converge on one or two goods, almost always gold or silver, as the medium of exchange. Now we must attend to a rather more subtle point, often over looked. Remember, that before gold was adopted as the medium of exchange in our model market, we had several goods, e.g., oranges, whose value increased because of their being perceived to be in gen eral demand. People wanted oranges, among other goods, in part because they thought that other people would take oranges in trade. The question that now arises is this. Once gold has become the generally accepted medium of exchange, what happens to the part of the value of oranges that rested on oranges exchange value? Before you try to answer, lets make sure that you understand the question. Before gold became accepted as money, oranges increased in value because people wished to use them as a medium of exchange. Once gold is accepted, what happens to this part of the value of oranges? Fairly obviously, it decreases; depending on circumstances, it may lose this part of its value altogether. People who want to exchange what they produce for a good that will be generally acceptable to others will now want gold, not oranges. Once a good is adopted as the medium of exchange, it becomes the main good whose value is determined by its general acceptability. 1. If gold is the medium of exchange, will the component of oranges value that depends on its general acceptability always fall to zero? Can you think of circumstances in which it will not?
154 An Introduction to Economic Reasoning I fear I must now issue a warning. The following section is among the most difficult in the book. It cannot be consigned to the limbo of extra-credit because it deals with one of the key theorems of economics. Money, as we have explained, did not arise through the com mand of the state. Neither did it arise through an explicit agree ment. People did not say: From this day forward, commodity x shall be the medium of exchange. Rather, money arose through the spontaneous processes of the market. First, gold was valued as a consumption good. It is mainly used for jewelry but can also be employed in other areas. For exam ple, it can be used to fill teeth, or for certain special industrial processes, etc. Next, gold gained value because people thought it would be generally accepted in exchange. And when people saw that it had this property to a greater extent than other goods, people valued it for exchange purposes even more than before. Thus gold became money. A few points about money need special stress. These are not especially difficult to grasp, but theorists outside the Austrian camp often ignore them. To begin with, the value of gold is due almost wholly to its services as a medium of exchange. But gold did not begin as a medium of exchange. It began as an ordinary commodity, with utility for purpose other than exchange. Carl Menger, the founder of the Austrian School of Economics, pioneered this account of the origin of money in his Principles of Economics In so doing, he achieved a crucial breakthrough in eco nomic theory. Before him, people often thought that money arose by an explicit agreement to accept a given substance as money. John Locke, a great political theorist but a not-so-great economist, held this view. Menger showed that Locke and those who thought as he did were in this instance wrong. THE MONEY REGRESSION THEOREM
Chapter 9: Money, Part 2 155 MISES ON MONEY REGRESSION ? 1. See if you can find out the origin of the phrase the result of human action but not of human design. 2. Once again, praxeology has been abandoned. Mengers analysis is simply a historical account. There is nothing necessary about it. Discuss this objection. 3. Do a report on F.A. Hayeks work on spontaneous order. Suggested reading: Hayeks 3 volume work, Law, Legislation & Liberty (C hicago: University of Chicago Press, 1978). I have so far failed to fulfill a promise; and you are probably glad. The material on money regression was supposed to be hard, but so far (I hope) it hasnt been. Now the fun begins. How does the market determine the value of an ordinary com modity, e.g., ice cream? As you will recall from previous chapters, those magic words demand and supply answer the question. And what, in turn, determines demand and supply? The preferences of the demanders and suppliers of ice cream. Money, on Mengers account, is a commodity; so the same analysis should apply to it. The value of gold, then, depends on the demand and supply of gold. The demand and supply schedules, fur ther, rest on the utilities of the demanders and suppliers of gold. So far, so good. But now a problem looms. The demand for gold depends on the utility of gold. But what determines this? Remember, the utility of gold resides almost entirely in its use as a medium of exchange. People want gold because they can use it to get whatever else they want AT LAST WE GET TO MISES
156 An Introduction to Economic Reasoning ? Can you see why this poses a problem? We are attempting to determine the value, i.e., the utility of gold. But the utility of gold depends on its purchasing-power its value in obtaining other goods. We appear to be engaged in circular reasoning. That is, we are explaining something in terms of itself. And this is a major logical no-no. 1. Give examples of circular reasoning. 2. Is circular reasoning always wrong? Arent some state ments self-explanatory? It appears then that money is the great exception in value the ory. We cannot use conventional utility theory to explain the value of gold, since the utility of gold depends on the value of gold. Hence we must look elsewhere. (I warned you this was tough!)
Chapter 9: Money, Part 2 157 HAS MISES SOLVED HIS PROBLEM? ? Ludwig von Mises showed in The Theory of Money and Credit (1912) that the value of money can be accounted for by ordinary utility theo ry. The attempt to do so need not involve reasoning in a circle. How did Mises find a way out of the circle? He noted that the val ue of money today depends on the value of money yesterday. When people are trying to value gold, they must estimate the pur chasing power of gold. Their only basis for doing so is the value of money yesterday. Note that Mises did not mean that the value of money today equals its value yesterday. If that were his contention, Misess theo ry would be false. It would have the consequence that the value of money never changes (can you see why?), which is contrary to obvi ous fact. Mises is saying that people must use the value of money yesterday as the basis for estimating its value today. 1. Extra-credit: In an extra-credit section in the previous chapter, I raised a problem that involved praxeology. People will tend to converge on one or two goods as a medium of exchange. In doing so, they choose the good they think most likely to have the highest exchange value. The problem raised was this: is it necessarily true that their estimates depend on which item has been most val ued as an instrument of exchange? Misess analysis of the value of money appears to solve this difficulty. It appears that he has not really done so. True, he has avoided the circle: He does not explain the value of money by the value of money. He explains the value of money today by its value yesterday.
158 An Introduction to Economic Reasoning But is this really an improvement? What explains the value of money yesterday? Obviously, the value of money on the day before yesterday. And the value of that? Its value on the day before that, and so on. We appear to have exchanged a circle for a regress. In a regress, we say: A depends on B, B depends on C, C depends on D and we never reach a term that is not dependent on some pre vious term. Although this can be disputed, it seems that a fully sat isfactory explanation cannot take this form. Here precisely lies Misess genius as a monetary theorist. He showed that his account of the value of money by its value on the previous day does not entail an unsatisfactory regress. What hap pens when we keep pushing back the explanation? The value of gold at t depends on its value at t-1 which depends on its value at t-2 Eventually, we reach a day in which gold had no value as an instrument for obtaining other commodities. The purchasing power component of its value drops out, and the value of gold on day one depends entirely on its use for non-monetary purposes. Mises thus integrated the explanation of moneys value into gen eral utility theory. Money is not an exception: its value can be explained by the same theory as other commodities. The purchasing power of money just makes the explanation rather more complicated. Do you see a crucial premise needed if Misess explanation is to work? There must be a day one in which the monetary commodi tys value is not determined at all by estimates of its purchasing power. Otherwise, we shall not have escaped the regress. Of course gold, the example I used to explain Misess argument, does have a non-purchasing power value. But Mises does not contend that gold (or silver) must be adopted as a societys requirement. Nevertheless, money must originate as a non-monetary commodity. Can you see why it must? Without a value on day one, there would be no means available by which people could estimate the purchasing power of money. And it is essential that they be able to do this in order for money to serve as a medium of exchange.
Chapter 9: Money, Part 2 159 To Misess argument there is an obvious objection. What about paper money? Some paper money is merely a claim receipt for gold, but other paper money is not. This type of money, called fiat money is simply declared to be money by the government. Absent this dec laration, its value would be nil. The fiat money would then just be worthless pieces of paper. Regardless of whether the government should issue fiat money, it very often does so. Is this not a refutation of Misess account? He says that money must originate as a commodity. But fiat money does not so originate. Hence Misess theory collapses; A beautiful theo ry, ruined by a stubborn fact. In fact, Misess theory does not have the consequences our sup posed refutation imputes to it. Mises does not deny the possibility of fiat money. Rather, he claims that fiat money is parasitic on com modity money. In the absence of commodity money, people would have no way to estimate the purchasing power of fiat money, and this sort of money could not exist. An assortment of paper money
160 An Introduction to Economic Reasoning ? 1. Why does the existence of money require that people be able to estimate its purchasing power? 2. Mises gives an account of the value of money, but he does not show that any competing account is impossible. Hence he does not show that money must originate as a commodity. Evaluate this objection.
Chapter 10 The Gold Standard AN UNUSUAL CHOICE 163 ? M oney, we have seen, begins as a commodityotherwise peo ple would not know what value to give it. But, what com modity? As mentioned in the previous chapter, this is not some thing we can determine by a priori reasoning. Many different goods have served as moneyincluding cows and cigarettes. But, I am sure you will recall, although we cannot figure out which good a society must adopt as money, we can establish some general principles that narrow the range of choice. A good can become money only if it is widely accepted by people in a society. Further, people must believe that it will be accepted if offered in exchange. 1. Why is the latter requirement needed? Why isnt it enough if the members of a society accept a good in exchange? Why must people also believe that it will be accepted? 2. Its easy to understand how a society could adopt cows as money: think of an agricultural community where cows feature prominently. But how can cigarettes get to be money? The group that chose cigarettes was in an extraordinary situation. It consisted of soldiers in a prisoner of war camp. Since every one
164 An Introduction to Economic Reasoning THE USUAL CHOICE ? ? realized that (nearly) everyone else wanted cigarettes, then, no doubt to the dismay of the American Medical Association, ciga rettes were a highly demanded good. They became money in the way the money regression theorem indicates. 1. Doesnt the cigarette example really disprove the regres sion theorem? Didnt people in the camp agree among themselves that cigarettes would be considered money? But the regression theorem says money isnt established by agreement. What is wrong with this objection? Hint: does it follow from the theorem that the evolution of money must take place slowly? Were you able to figure out the answer to the last question? Remember, the regression theorem says that the value of the money commodity cannot be determined just by decision. But if people know that cigarettes will be generally accepted, and are aware, through trades, of the price of other goods in terms of cigarettes, things can move very fast. In most societies, cigarettes are not the medium of exchange. As mentioned before we digressed onto cigarettes, there are some gen eral principles that limit the range of goods that will be chosen as money. These principles, as you will recall from the previous chap ter, have led most societies with access to gold or silver to adopt one of these metals, or both, as money. 1. Review the properties of money that make gold and silver desirable mediums of exchange.
Chapter 10: The Gold Standard 165 THE MARKET SOLUTION ? 2. If gold and silver are in fact so useful as money, why isnt the United States on the gold standard? Sometimes, a society will use both gold and silver as money. Usually, silver will be used for smaller transactions, gold for larger. A monetary system with two metals at once poses a problem. We will have some prices of goods given in gold and others given in sil ver. 1. How may these prices be compared with each other? 2. Extra-credit: Why does the answer to the first problem suggest a further problem about the prices of other goods? How can this difficulty be resolved? The key to our first problem is straightforward. Gold and silver are commodities, just like apples and oranges. They can then trade against each other. For example, the market may establish this pri ce: 1 ounce of gold exchanges for 16 ounces of silver. Suppose this ratio is chosen, will it always remain constant? That is, will gold and silver always exchange according to the formula just give n? As I hope you have realized, the answer is no. The ratio is a price; and just like other prices, it is determined by demand and supply. These, in turn, depend on the utilities of the buyers and sell er. (Go back to the chapters on utility and demand and supply for a
166 An Introduction to Economic Reasoning ? review. You cannot go over these basic principles too many times. To understand economics, you must know demand and supply.) Lets assume that more silver is mined while the amount of gold stays the same. As more silver enters the market, the marginal util ity of silver decreases. (Why?) What will be the effect on the exchange ratio of gold and silver? People will now have to give up more silver than before to get an ounce of gold. We will have a new ratio of exchange, e.g., 1 ounce of gold exchanges for 16.5 ounces of silver. 1. Draw supply and demand diagrams to illustrate the change just described. (Of course, I could have put them in the book! But its much better that you, the student, construct them for yourself. Besides, its easier for me.)
Chapter 10: The Gold Standard 167 OTHER GOODS OTHER GOODS CONTINUED ? ? 2. Draw supply and demand diagrams showing the effect of an increase in the supply of both metals; a decrease in both; and an increase in one accompanied by a decrease in the supply of the other. I really make you work, dont I? The market has established an exchange ratio, say 16 to 1, between ounces of silver and gold. Is everything now all right? No, not necessarily. Some goods will be priced in gold and oth ers in silver. These prices, of course, will be determined by the demand and supply of these goods, relative to the demand and sup ply of gold and silver, respectively. For example, 1000 oranges may exchange for 2 ounce of silver. 1. What do you think the gold price of 1000 oranges would be, given the silver price just quoted? In the market, we will have all sorts of different exchange ratios, or prices, some stated in terms of gold, some in terms of silver. All these prices must match the goldsilver exchange ratio. What does this mean? Suppose someone wants to buy oranges but doesnt have any silver. He asks the orange grower, How much gold must I give you for your 1000 oranges? (Speakers in economics
168 An Introduction to Economic Reasoning ? text books often express themselves in stilted sentences.) Our Orangeman is no dummy; he replies, c ounce of gold. The owner of gold, eager to secure the oranges, accepts. Can you see the problem that now arises? We have the following exchange ratios: 16 ounces of silver exchanges for 1 ounce of gold 2 ounce of silver exchanges for 1000 oranges c ounce of gold exchanges for 1000 oranges As Lord Tennyson the great British poet, says, in The Charge of the Light Brigade, Someone had blundered. You should easi ly discern who it is: its the sap who gave up c ounce of gold to get 1000 oranges. The fortunate Orangeman now has c ounce of gold. We can now obtain 2 ounces of silver for his gold. (Why?) After doing so, he can buy 4000 oranges. (If he is even more lucky, he can start the round again, this time getting 2 ounce of gold from the sap for 4000 oranges.) Unfortunately for the Orangeman, but fortunately for the sap, this situation will soon come to an end. Other Orangemen will attempt to get in on the good deal. They want the gold for them selves: they will not act as United Orangemen. But the sap has only a limited amount of gold to offer for oranges. How can each Orangeman get as much as possible for himself? He will offer the sap a better deal. He will, say, offer 2000 oranges for c ounce of gold. 1. Why will he do so? The sap will give up 1/8 ounce of gold for 1000 oranges. Why offer an extra 1000?
Chapter 10: The Gold Standard 169 THE SAP GETS WISE, PART 2 ? THE SAP GETS WISE If he didnt offer more oranges, what would happen? He might be shut out of the market. His fellow Orangemen would all be try ing to get the gold; and there is not enough to go around. If he offers 2000 oranges, his chances to get gold increase. The sap prefers to get 2000 oranges rather than 1000 oranges for his c ounce of gold. (He isnt that idiotic.) The Orangeman will make less profit than before, but it is still well worth it for him to up his offer. 1. Work through the exchange ratios to show why it is still to the advantage of the Orangeman to get 1/8 ounce of gold for 2000 oranges. How high do you think the bidding will go? 2. What do you think the sap will do when he sees Orangemen bidding up the price? More and more Orangemen will see the opportunity to make a killing in the market. And perhaps others, who do not now own oranges, will see the advantage to be gained by purchasing them. Once they have the oranges in hand, they can attempt to secure gold from the sap. Meanwhile, the sap sees that his gold is in demand. (Even idio cy is usually not of infinite extent.) He will suspect that he has been offering too much gold and will lower his offer.
170 An Introduction to Economic Reasoning ENTER THE STATE ? ? Thus, our exchange ratio of c ounce gold for 1000 oranges faces pressure on two fronts. Orangemen offer more oranges and the sap offers fewer ounces of gold. How long will this go on? Until no profits from a series of trades can be obtained. Gains from a series of trades, based on price discrepancies, are called arbitrage gains. We considered them in an earlier chapter, where we dis cussed the law of one price. Here we see that there is nothing spe cial about money. Gold and silver, just as much as oranges and apples, obey the law of one price. 1. If gold and silver behave like regular commodities, why do you think that many people regard money as subject to completely different economic laws from other goods? Suppose, once more, that silver and gold exchange at a 16 to 1 ratio. In the way I have just explained, all prices of goods on the market match: no gains are to be had from arbitrage transactions. All well and good, certain economic reformers will say, but the balance is easily upset. As soon as the quantity of gold or silver changes, the ratio of 16 to 1 is outdated and must be altered. But it takes time to do so. Meanwhile, the possibility of arbitrage is pres ent. Why not make calculation of prices easier? To do so, let us make the 16 to 1 ratio permanent. Then, we never have to worry about arbitrage in money again. 1. What ethical assumptions about arbitrage and calculation does our imagined reformer make? Are these assumptions justifiable?
Chapter 10: The Gold Standard 171 DIGRESSION ON ETHICS ? One of the themes of this book emerges here with crystal clar ity. It is very easy to assume that certain ethical views, or value judgments should be adopted, even though examination shows them to be controversial and in need of justification. Our reformer has made two such controversial assumptions. First, he correctly notes that changes in supply and demand take time before they affect prices. Even though the 16 to 1 ratio no longer corresponds to the actors present utilities, it remains in place until changed. But why should we think that something is wrong with this? Why should adjustment of prices to changes in demand and supply be instantaneous, or at any rate, faster than the market accomplish es by itself? Be careful not to make an unjustified assumption about what I am saying here. We do not contend that the ideal of instan taneous price adjustments is misplaced. Rather, I wish all readers to note that an ethical assumption has been made by the reformer. If he moves from (1) price adjustment takes time; to (2) price adjustment takes too much time, he has taken a step that requires argument in its support. And our reformer has smuggled in another unexamined assumption: adjustments that take place through arbitrage are bad. What is wrong with arbitrage? Our reformer must tell us. Once more, we have not assumed that arbitrage is morally all right; we have wished merely to call attention to a burden of proof too often overlooked. 1. Give other examples in which proposals for economic reform contain smuggled-in value judgments.
172 An Introduction to Economic Reasoning SURPLUSES AND SHORTAGES ? We shall not, for the moment, take our discussion of ethics fur ther. Here we shall restrict ourselves to positive economics. (Recall the distinction between positive and normative statements, discussed earlier.) Suppose, once again, that the market has established the 16 to 1 ratio. New gold mines in Patagonia are discovered, and an increased quantity of gold has come onto the market. Assuming that utilities otherwise remain unchanged, the price of gold will fall. One ounce of gold will be able to command only 15 ounces of sil ver in exchange, for example. But the state has imposed a 16 to 1 ratio. If you have one ounce of gold, you will be able to get 16 ounces of silver for it in the mar ket. You would have been willing, by hypothesis, to take 15 ounces of silver for your gold; but you certainly have no objections to get ting an extra ounce. Silver dealers will prove more recalcitrant. The 16 to 1 ratio no longer reflects the market price. If it is enforced, silver dealers will be less willing than before to offer silver on the market. Gold will tend to become the exclusive medium of exchange. Why will these results ensue? We must, as always, revert to a basic principle. Money is a commodity. 1. How does this principle enable us to analyze the effects of a fixed exchange ratio? We hope that you answered the question by reference to sur pluses and shortages. Remember the effect of a maximum price GRESHAMS LAW
below the market price? There will be a greater quantity of the good demanded at the artificially lower price than will be offered for sale. In brief, there will be a shortage. This is exactly what has happened in our example. The price of silver is artificially low. Its market value is 1/15 ounce of gold, but its state-mandated price is only 1/16 ounce of gold. Hence a shortage. Looked at from the opposite angle, the price of gold is artifi cially high. There is a surplus of gold at the artificially enforced ratio. Purchasers of gold demand a lesser quantity of gold at the 16 to 1 ratio than suppliers offer at that price. In sum, money overvalued by the state will tend to drive money under valued by the state off the market. This is Greshams Law, usually stated as bad money drives out good. Our formulation, which comes from Murray Rothbard, is preferable to the tradition al one. It tells us what bad and good money are. As we have learned in this chapter, the free market can readily han dle a system with both gold and silver as money. So long as the state does not impose price controls, both metals will circulate as money. But peoples preferences may change. They may find two sorts of money, with frequently fluctuating exchange ratios, to be inconven ient. In that case the market stands ready with a solution. If enough people stop using one of the metals as money, it will cease to be money. Remember the money regression theorem? The demoneti zation process goes exactly in reverse from the path it delineates. A commodity that grows more and more in demand as a medi um of exchange gains extra value by this fact. Silver, e.g., becomes valuable not only for its use in rings or teeth, but for its services in making exchange easier. Chapter 10: The Gold Standard 173 A SINGLE METAL STANDARD
174 An Introduction to Economic Reasoning ? If some people stop accepting silver in exchange, then it will lose its value as a medium of exchange. As it loses value, it becomes even less demanded by market exchangers. A spiral-like effect occurs, just the opposite of the process by which money is created. If a commodity loses all (or nearly all) of its value as a medium of exchange, it has been demonetized. Its value is now determined just like that of any other non-monetary good. Though this is not a praxeological law, it is safe to predict that a free market will tend to supplant a two-metals currency with a single-metal standard, for convenience. The metal chosen will normally be gold. 1. Why will a free market tend to establish a gold rather than a silver standard?
Conclusion I n this book, we have tried to convey one fundamental lesson. It is possible to think in a systematic, logical way about economics. You need not accept statements just because the book says so, and you do not have to wait until graduate school to find out the basis for what you are asked to believe. To understand economics requires only careful attention to rea soning, in some cases perhaps a little diffiult and abstract. (I didnt mention this feature at the start, in order not to scare anyone off.) At least, this is the case if the economics in question is Austrian eco nomics, the type we have endeavored to present to you. In it, we begin with the action axiom and deduce from it pow erful theorems, such as the law of diminishing marginal utility con centrated on the application of Austrian reasoning to two key areas, price and the nature of money. What is the law of demand? What is wrong with Marxs labor theory of value? Why must money originate from a non-monetary commodity? These are a few of the questions you should now be able to answer, if you have made it through my bad jokes. Further, I hope you will now realize how prices coordinate demand and supply without government interference. Measures of intervention, such as price and wage controls, fail to achieve the purposes their advocates profess. In like manner, the government cannot originate money by fiat out of thin air. Of course, if you conclude from this that government should not intervene, you have made a normative judgment. I hope that you 175
176 An Introduction to Economic Reasoning now understand how judgments of value differ from descriptive state ments, as well as how knowledge of matters of fact help us make informed policy decisions. If you have studied this book carefully, you should be ready to read for yourselves such great Austrian economists as Carl Menger, Eugen von Bhm-Bawerk, Ludwig von Mises, and Murray N. Rothbard. I am well content to be, as John Locke said in another context, their underlaborer.
Arbitrage : gains that come from taking advantage of differences in prices in local markets. Arbitrageurs see these differences and bring about a single price for each good. Arbitrageurs: those who take advantage of price discrepancies in the market for a good. Austrian Economics: a type of economics based upon deduction from the nature of human action, especially stressing the sub jective nature of value. Austrian School : a group of economists including Menger, BhmBawerk, Mises, and Rothbard, whose work is based on the sub jective theory of value. Axiom: a foundational principle, taken to be evident and not in need of derivation. Barter: exchange of goods not involving money. Capital: (1) goods used in production. These goods are not valued for the immediate satisfactions they provide, but for their help in transforming goods into finished products. Glossary 177
(2) the monetary value of goods just described. Warning: Do not confuse these two senses. Capitalism: an economic system characterized by private owner ship of the means of production. Categorical syllogism: a deductive argument of certain type (see syllogism ), all the premises of which are assertions. Commodities: goods bought and sold on the market. Communism: a synonym for socialism, usually of a radical kind. Cost: the utility of the highest valued alternative not chosen. Cost of production: the value of the highest alternative foregone in order to produce something. Deduction: the process of reasoning from premises to a conclu sion, in accord with the laws of logic. Deduction: a type of reasoning which draws conclusions from premises. Deflation: a decrease in the supply of money in an economic system. Demand: in economics, the amount of one good offered to pur chase another good. Not the bare desire for a good, as often used in ordinary English. 178 An Introduction to Economic Reasoning
Demand and supply: the basic determinants of price. Demand is the quantity of goods consumers are willing to offer for a par ticular quantity of a commodity. Supply is the quantity of the commodity sellers are willing to offer at a given price. Demand schedule: a table of the quantity of a good consumers wish to buy at various prices. Diminishing marginal utility, law of: a basic principle of praxeol ogy, according to which the supply of a good is devoted to increasingly less-valued uses. Double coincidence of wants: a necessary condition for exchange. Each exchanger must prefer what the other offers to what he already has. Equality: the assumption that goods exchange are in some sense identical. Equilibrium: a situation in which buyers and sellers can make no mutually beneficial exchanges. Ethical assumption: a statement that something morally ought to be the case. Exchange: the trade of one economic good for another. Exchange ratios: statements of what quantity of any good will exchange for what quantity of another, e.g., if one apple exchanges for one orange, and apples and oranges are in a 1:1 exchange ratio. Exchange-value: the worth of an economic good in trade. Glossary 179
Expectations: assumptions about future economic conditions, especially prices. Fiat money : money issued by the state, without any commodity backing. Fixed costs: costs that, at the time an economic decision is made, have already been expended. Fluctuating exchange ratios: exchange ratios, especially of money, which are determined by the market and hence vary. Frational reserve banking: a system in which a bank can issue multiple receipts for the monetary commodity it has on hand. Gold standard: a monetary system in which gold is the generally accepted monetary commodity. Greshams Law: the principle that money overvalued by the state will tend to drive out money undervalued by the state. Hedonism: an ethical system that ranks choices by the amount of pleasurable sensations to which they give rise. Hermeneutician: someone who uses or advocates hermeneutics. 180 An Introduction to Economic Reasoning
Hermeneutics: a view that human action cannot be understood by scientific laws, but must be grasped in an act of intuitive appre hension. Historicism: the doctrine that there are no universally valid eco nomic laws. Economic principles apply, at most, to particular historical periods. Hypothesis: an assumption, usually in the form if A, then B. If-clause: the part of a hypothetical that states a certain condition. Imputation: the process by which the value of consumer goods is transferred backward to the goods that produce them. Indirect exchange: trade that does not secure the commodity desired in a single exchange, but proceeds by one or more intermediate steps. Inflation: an increase in the supply of money in an economic system. Interest rate: the premium that must be paid to obtain the use of money or capital. Principally determined by the rate of time preference. Intransitive preferences: preferences of the form: A is preferred to B; B is preferred to C; but it is not the case that A is preferred to C. Labor: human expenditure of effort in production. Glossary 181
Law of marginal utility: the principle that the units of a good will be directed to satisfy the highest ranking preferences not yet satisfied. Law of one price: the tendency for a uniform price for a given commodity to prevail on the market. Labor theory of value: the view that the value of a good is the labor time required to make it. Logic: the normative science of reasoning. Marginal buyers: buyers who, at a slightly higher price than the market price, would exit the market. Marginal unit: the unit of a good devoted to the lowest ranked preference of the preferences that the good satisfies. Marginal utility: the value of the last unit of a commodity. Alternatively, the value of a unit or a good, if one unit of the good had to be given up. Market: the setting in which economic exchanges take place. Market clearing price: the price at which the quantity of a good demanded equals the quantity supplied. Marxism: a system of economics devised by Karl Marx (1818 1883) based on the labor theory of value. It calls for the replacement of capitalism with socialism. Medium of exchange: a good used to facilitate the exchange of other goods. 182 An Introduction to Economic Reasoning
Minimum wage legislation: a law forbidding the offer of employ ment at a wage below a specified rate. Money: a commodity whose principal use is to facilitate the exchange of other commodities. It is demanded because each person knows that others will accept it in exchange. Money regression theorem: an argument, developed by Menger and Mises, that the purchasing power of money must originate from the use of the money commodity as a non-monetary good. Neoclassical economics: a type of economics that makes extensive use of equilibrium assumptions, is heavily mathematical, and is incompletely subjectivist. One-hundred percent reserve banking: a banking system in which all money certificates must be fully backed by the mon etary commodity. Ought-statement: a statement of what should be the case, as opposed to what is the case. Pareto optimal situation: a state of affairs in which no person in society can have his utility increased by redistribution of resources without making someone else worse off. Glossary 183
Praxeology: a deductive science that examines the implications of the axiom that human beings act. Preference: a ranking of available alternatives: if S chooses A over B, then S prefers A to B. Premises: statements from which conclusions are drawn. Price: the ratio of exchange between two commodities. Price ceiling: a legally imposed maximum price. Price controls: forcible interference, usually by the state, with market prices determined by supply and demand. Price determination: the process by which the price of a com modity in a market is fixed. Purchasing power of money: the amount of commodities a unit of money is able to buy. Rationing: a system for distributing goods when demand exceeds supply under a governmentally mandated price. Reductio : a proof that shows that denial of the desired conclusion leads to a contradiction. Regression theorem: the principle that the value of money ulti mately stems from the m money commoditys nonmonetary use. Rent: the price paid for the use of an asset that belongs to someone else. 184 An Introduction to Economic Reasoning
Scientific socialism: a synonym for Marxism, based on a Marxist belief that the onset of socialism is probably inevitable. Shortage: a situation in which the quantity of a good demanded exceeds the quantity supplied. Social Security: a governmentally mandated system in which workers and employees are taxed and retired workers receive a pension. Not equivalent to a private insurance plan. Socialism: a system of production based on central ownership of the means of production. Spontaneous processes: a series of events that generates an organ ized outcome without central direction. Strike: an organized work stoppage, aimed at inducing an employ er to offer better conditions of work. Subjective theory of value: the view that economic value is deter mined by the choices of actors in the market. Supply: a good offered for sale in the market. Surplus: a situation in which the quantity of a good supplied exceeds the quantity demanded. Syllogism: a form of reasoning in which a conclusion is deduced from a major and minor premise. Symbolic logic: a system of logic not restricted to the subjectpredicate statements of ordinary language. Glossary 185
Tautology: a statement, e.g., a definition or part of a definition that is true solely because of the meaning of the terms it contains. Time preference rate: the rate by which people prefer goods in the present to goods in the future. This rate principally deter mines the rate of interest. Transaction: a purchase or sale of any commodity. Transactions cost: the expenses that come about because a trans action takes place; e.g., bargaining cost. Unemployment: a state of affairs in which a workers services are not in demand at a given wage rate Utilitarianism: a system of ethics that maintains that the good is whatever maximizes happiness. Utility: the value of a good to a consumer. Value: the attribute of a good that fits for use, or enables it to secure other goods in exchange on the market. Value, subjective theory of: the view, developed by the Austrian School, that economic value is not an inherent property of a good. Rather, it is determined by the preferences of those who wish to acquire the good. 186 An Introduction to Economic Reasoning
E veryone who reads this book should also read Henry Hazlitt, Economics in One Lesson (Arlington House, 1979), which is much easier to understand than the present work. It is a superb account of how economic theory applies to the real world. You will also find extremely helpful Murray Rothbards bril liant, and very short book What Has Government Done to Our Money? (Ludwig von Mises Institute, 1990). This is a very clear presentation of Austrian monetary theory. If you want to know how the current U.S. monetary system got started, the same authors The Case Against the Fed (Ludwig von Mises Institute, 1994) is a good place to begin. The two greatest twentieth-century works of the Austrian School are Ludwig von Misess, Human Action (Ludwig von Mises Institute,  1998) and Murray Rothbards, Man, Economy, and State (Ludwig von Mises Institute,  1993). You will probably find them hard going, however, and you should be satisfied with reading whatever interests you in them. Rothbard is much easier than most parts of Human Action Probably the best way to get the flavor of Mises is to start with essays in his Planning for Freedom (Libertarian Press, 1980) and the essay Planned Chaos in Socialism (LibertyClassics, 1982). Recommended Readings
D r. David Gordon is a Senior Fellow at the Ludwig von Mises Institute, and editor of The Mises Review He was educated at UCLA, where he earned his PhD in intellectual history, and is the author of Resurrecting Marx: The Analytical Marxists on Exploitation, Freedom and Justice; The Philosophical Origins of Austrian Economics and Critics of Marx He is also editor of Secession, State & Liberty and co-editor of H.B. Actons Morals of Markets and Other Essays Dr. Gordon is a contributor to such journals as Analysis, The International Philosophic Quarterly, The Journal of Libertarian Studies, and The Quarterly Journal of Austrian Economics About the Author