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Newness and imputed accuracy of management forecasts

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Title:
Newness and imputed accuracy of management forecasts an empirical investigation
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Beshara, Robert L ( Robert Labib ), 1944-
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vii, 142 leaves : ill. ; 28 cm.

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Analytical forecasting ( jstor )
Earnings forecasting ( jstor )
Error rates ( jstor )
Forecasting standards ( jstor )
Information content ( jstor )
Investors ( jstor )
Net income ( jstor )
Null hypothesis ( jstor )
Statistical forecasts ( jstor )
Stock prices ( jstor )
Business forecasting ( lcsh )
Income forecasting ( lcsh )
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bibliography ( marcgt )
theses ( marcgt )
non-fiction ( marcgt )

Notes

Thesis:
Thesis (Ph. D.)--University of Florida, 1981.
Bibliography:
Includes bibliographical references (leaves 137-141).
General Note:
Typescript.
General Note:
Vita.
Statement of Responsibility:
by Robert L. Beshara.

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University of Florida
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Copyright [name of dissertation author]. Permission granted to the University of Florida to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
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NEWNESS AND IMPUTED ACCURACY OF MANAGEMENT
FORECASTS: AN EMPIRICAL
INVESTIGATION


















by

ROBERT L. BESHARA


A DISSERTATION PRESENTED TO THE GRADUATE
COUNCIL OF THE UNIVERSITY OF FLORIDA IN PARTIAL
FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF
DOCTOR OF PHILOSOPHY








UNIVERSITY OF FLORIDA
1981
















ACKNOWLEDGEMENTS


The author gratefully acknowledges the assistance and

support of the Supervisory Committee in the completion of this

dissertation.

Dr. Rashad Abdel-Khalik provided valuable guidance

and criticisms. Dr. Bipin Ajinky offered assistance and encouragement

far beyond the call of duty.

D. Robert Radcliffe offered helpful advice and

suggestions.

Gratitude is also expressed to Dr. Barnhill for his

editorial comments, and Ms. Susan Robinson for the cheerful typing

assistance.

Special acknowledgements are made to the Clarkson and

Gordon Foundation and Carleton University for providing financial

assistance.













TABLE OF CONTENTS
Page
ACKNOWLEDGMENTS............................................... ii

ABSTRACT........................ .................... ........... v

Chapter

I. STATEMENT OF THE PROBLEM AND PURPOSE OF THE
DISSERTATION.......................................... 1

Introduction........ ....... ...... ................... 1
Statement of the Problem............................. 4
Purpose of the Dissertation.................... ....... 8

II. PRIOR RESEARCH ON THE INFORMATION CONTENT OF
MANAGEMENT FORECASTS OF EARNINGS........................ 10

The Foster Study..................................... 10
The Gonedes, Dopuch and Penman Study.................. 13
The Patell Study.................................... 16
The Jaggi Study..................................... 20
The Penman Study.................................... 21
The Nichols and Tsay Study........................... 26
Summary and Limitations of Existing Research......... 30
Notes.. ...... ............................ .. ...... 35

III. DATA, METHODOLOGY, AND STATISTICAL TESTS................ 36

Data ................................................. 38
Definitions........................... ............... 42
Experimental Portfolios.............................. 42
Control Portfolios.................................. 44
Statistical Tests.................................... 46
Residual Analysis................................... 46
A Standardized Prediction Errors................ 47
B Unstandardized Prediction Errors .............. 52
Analysis of Variance................................ 52
Hypotheses....................... ............. ....... 56
A Testing the Effect of Forecasting Action...... 56
B Testing the Effect of Newness of Earnings.....
Forecasts..................................... 58
C Testing the Effect of Imputed Accuracy........ 59
D Testing the Effect of Management Forecasts
on Other Firms in the Same Industry............ 61
Notes................................................ 63















Chapter Page
Page
IV. RESULTS ............ .... ............................... 64

Introduction.......... ....... ...................... 64
Total Sample........................................ 65
The Effect of the Forecasting Action................. 68
The Effect of Newness of Management Earnings
Forecasts.... ...................................... 76
A The Positive Portfolio........................ 76
B The Negative Portfolio........................ 85
The Effect of Imputed Accuracy....................... 93
Positive Forecasts High Imputed Accuracy........ 93
Positive Forecasts Low Imputed Accuracy.......... 100
Comparison Between the High-level and the Low-
level Imputed Accuracy............................ 109
Negative Forecasts High Imputed Accuracy........ 113
Negative Forecasts Low Imputed Accuracy......... 120
Comparison Between the High-level and the Low-
level Imputed Accuracy........................... 125

V. SUMMARY AND CONCLUSIONS.................................. 131

BIBLIOGRAPHY.................................................. 137

BIOGRAPHICAL SKETCH... ....................................... 142
















Abstract of Dissertation Presented to the Graduate Council of
the University of Florida in Partial Fulfillment of the
Requirements for the Degree of Doctor of Philosophy


NEWNESS AND IMPUTED ACCURACY OF MANAGEMENT FORECASTS:
AN EMPIRICAL INVESTIGATION


By

Robert L. Beshara

December, 1981


Chairman: Dr. Rashad Abdel-Khalik
Major Department: Accounting



The purpose of this dissertation was to empirically

examine the information content of management forecasts of earnings.

The following four research questions were examined:

1. Do management forecasts of earnings convey information in

excess of what is already available to market participants?

2. Does the forecasting action by itself convey favorable

information to investors?

3. Does the information content depend upon the level of

newness and imputed accuracy ascribed to management

earnings forecasts?









4. Do management earnings forecasts convey information

pertinent to establishing equilibrium prices of non-fore-

casting firms in the same, or similar, industry?

The experimental sample consisted of 401 management earnings forecasts

covering the period 1970-77. The total sample of management earnings

forecasts was classified into neutral, positive, and negative fore-

casts according to the magnitude and the sign of the new information

revealed by each forecast. Two control samples were utilized to

detect industry-wide and economy-wide effects. Results of the study

indicate that:

1. The positive (negative) news of forecasts induced an upward

(downward) stock price revisions during the forecasts

announcements week. This revision was found to be

statistically significant.

2. The forecasting action by itself induced an upward stock

price revision during the forecast announcement week. Such

revision, however, was neither sufficiently strong nor was

it the general pattern of the neutral portfolio to be

considered statistically significant.

3. Stock price revisions associated with the high-level

imputed accuracy portfolio were considerably higher than

those associated with the low-level imputed accuracy

portfolio for the positive news management earnings

forecasts but not for the negative news forecasts.










4. Negative news management earnings forecasts seem to convey

industry-wide information, while positive news forecasts

are perceived to be firm specific events. This conclusion,

however, should be tampered by the fact that the sample

size for this classification of forecasts is relatively

small.
















CHAPTER I


STATEMENT OF THE PROBLEM AND
PURPOSE OF THE DISSERTATION



Introduction

The recent attempt by the Securities and Exchange Commission to

regulate the disclosure of management earnings forecasts has received

considerable attention at both the pragmatic and the academic levels.

The widely held belief that management forecasts of earnings are

relied upon in investment decisions and the assertion that management

has access to information not available to outsiders have motivated

several empirical research studies on the subject.

Disclosure regulations of management forecasts of earnings

involve two closely related issues. The first issue is the extent to

which management earnings forecasts convey information not already

available to investors. The second issue is whether disclosure

regulations of earnings forecasts by management are consistent with

the optimal allocation of resources in society. Gonedes et al. (1976)

point out the relationship between these two issues as follows

(p. 90):


If one is confident that forecasts of, say, income
convey no information pertinent to valuing firms,


- 1 -






-2 -


then the entire debate over forecasts disclosure
is of little interest, insofar as external
accounting is concerned. A necessary condition
for public disclosure of forecasts to be
consistent with Pareto optimality is that the
forecasts convey information pertinent to resource
allocation.

Empirical research directly concerned with the information

content of management earnings forecasts has been scanty. Most of the

existing research has focused on either the absolute accuracy of

management forecasts or the relative accuracy of management forecasts

as compared to historically-based models and/or analysts' forecasts.

Confirming this observation are Gonedes et al. when they state

(p. 93):

The available empirical work on information
content deals with earnings forecasts voluntarily
made available by firms. The bulk of this work
examines the prediction performance or 'accuracy'
of earnings forecasts. The implicit assumption
here is that greater accuracy, however measured,
corresponds to greater information content.

Empirical research dealing with management forecasts accuracy

suffers from a major deficiency. That deficiency is the lack of a

theoretical structure capable of explaining the relationship, if any,

between ex-post accuracy and the information content issue. Gonedes

et al. (p. 94) point this out when they state:

There is a more fundamental deficiency in these
prediction performance studies and the a priori
arguments on information content. Specifically,
they are not based upon any explicit theoretical
structure that connects their framework to
resource allocation decisions made under
uncertainty. In order to determine whether
forecasts convey information pertinent to valuing
a firm, one needs a theoretical model that
identifies the determinants for firms' values,
conditional on the way in which resource
allocation decisions are made.







-3-


The efficient-markets hypothesis discussed by Fama (1970) and

the capital asset pricing model developed by Sharpe (1964) and Lintner

(1965) provide the theoretical structure for studies dealing with the

effect of new information on equilibrium stock prices. The

semi-strong form of the efficient capital markets maintains that

prices of securities reflect all publicly available information and

that the market reaction to new information occurs instantaneously in

an unbiased fashion. The capital asset pricing model, under certain

restrictive assumptions asserts that the price (return) of a security

depends on the risk-return trade-off set by the market and the

probability distribution of the expected returns on the security

considered jointly with the market portfolio. Beaver (1968, p. 68)

considers an item to have information content "if it leads to a change

in investors' assessment of the probability distribution of future

returns (or prices) such that there is a change in equilibrium value

of the current market prices."

Studies by Foster (1973), Gonedes et al. (1976), Patell (1976),

Penman (1978), Jaggi (1978), and Nichols and Tsay (1979), comprise the

major empirical research on the information content of management

forecasts. All of these studies utilized the theoretical structure

provided by the efficient-markets hypothesis and the capital asset

pricing model. Results of these studies are somewhat conflicting and

incomplete. Several research questions on the information content of

voluntarily disclosed management forecasts remain unexplored.







-4-


Statement of the Problem

The information content of management earnings forecasts is a

function of several attributes. Patell (1976, p. 248) points out

that, "the extent to which an earnings forecast alters investors'

beliefs may be a function of (at least) three attributes." These are:

1 the imputed accuracy of the forecast,

2 newness of the forecast; that is, the extent to which the

forecast's content is not already available to market

participants from other sources, and

3 the motive underlying the voluntary disclosure of earnings

forecasts.

The above attributes are neither independent of each other, nor

are they totally exhaustive. For example, it is reasonable to expect

imputed accuracy to be correlated to the level of newness of the

forecast. Also, the imputed accuracy of forecasts may depend upon

industry volatility and the motive for forecast disclosure. Imputed

accuracy of management forecasts at the time of forecast disclosure is

difficult to assess and it has not been considered in the existing

literature.

The newness of management earnings forecasts has been typically

based upon naive forecasting models. The available research on the

information content of management forecasts defines newness as the

deviation of the forecast from the naive modelss. Foster (1973),






-5-


Patell (1976), and Penman (1978) utilized historically-based naive

models as a proxy for current market expectations of earnings. These

models, although practically convenient, do not incorporate existing

and expected factors affecting the firm, the industry in which the

firm operates, and the economy at large. These factors, however,

directly influence investors' expectations of earnings and should not

be ignored.

The motive attribute has been examined, albeit not

extensively. The signalling theory developed by Spence (1973, 1974),

Riley (1975, 1977), and extended to disclosure regulations in

financial markets by Ross (1977) provides a theoretical structure for

voluntary disclosure of inside information by corporate executives.

The basic contention of the signalling theory is that in competitive

markets incentives exist for management to publicly disclose inside

information relevant to the valuation of their firms by outsiders.

These incentives will exist in competitive markets irrespective of the

classification of the information as 'good'or'bad'news. The

incentive-signalling theory is best summarized by Ross (1977, p. 20),

as follows:


In general, there is a hierarchy of firms from
best to worst based on the relative changes in
values that would occur if their inside informa-
tion was made public. The incentive-signalling
mechanism provides a structure that managers use
to disclose their information in such a way that
outsiders in the market believe it. Those with
the best news distinguish their firms from those
with the next best and so on down the line. At
the bottom of the hierarchy, those with the worst
news would like to suppress it, but since it is







-6-


not in their interest to offer guarantees provided
by those with better news, the worst news will
also be signalled.

Several technologies are available to management in competitive

markets to sort their firms on value relevant attributes. Public

disclosure of quantitative forecasts of earnings per share is one

possible technology. Change in dividend policy, reporting quarterly

earnings, changes in capital structure, and providing a qualitative

statement regarding future earnings are examples of other signalling

technologies. On the other hand, earnings forecast disclosure can not

be totally ascribed to deliberate revaluation of the firm by manage-

ment. Other motives for forecast disclosure such as the desire to

raise new capital, justification for market expansion, merger

decisions, pressure from the financial community, and other factors,

can not be ruled out.

Penman (1978) adopted the incentive-signalling theory to

examine the voluntary disclosure of forecasted earnings. More

specifically, the author posed the following research question (p. 2):

"Do investors receive forecast information potentially available from

all firms?" The empirical results of the study do not provide an

affirmative answer to this question. These results, however, are not

inconsistent with the incentive-signalling theory mainly due to the

fact that several signalling technologies are available to management.

Furthermore, the iterative mechanism of the incentive-signalling

theory will result in the screening of companies which do not issue






-7-


quantitative forecasts of earnings based upon their own signals as

well as the forecasting action of other firms. Penman (p. 46) points

out that:


S the firms which do not issue forecasts are,
in fact, screened out as a group by the
forecasting action of others. A 'no forecast' is
in fact a forecast that screens firms into this
group and value them accordingly.

The above discussion suggests that the information content of

management earnings forecasts has implications for non-forecasting

firms. This is conceptually appealing for two reasons. First, the

mechanism of the incentive-signalling theory is an iterative process

through which firms will find it advantageous to reveal their value

relevant attributes. This process need not take place on an

individual firm basis. Instead, it can take place through grouping of

firms according to similarity of value attributes. Second, on an a

priori basis, it can be argued that an earnings forecast by management

is a quantification of the expected impact of general economic

conditions on their firm. To the extent that other firms in the same

industry are affected by common economic forces, the forecast can also

be viewed as an assessment of the industry situation. As such,

management forecasts convey information about the forecasting firms as

well as the industry in which they operate. That is, the information

content of management forecasts may extend to other firms in the same

(or similar) industry. This, however, is an empirical question which

has not been examined in the current literature.







-8 -


Purpose of the Dissertation

The purpose of this dissertation is to examine the extent to

which management forecasts convey information not already available to

market participants. via other sources. The methodology utilized in

this study explicitly considers market expectations of earnings per

share immediately prior to the release of management forecasts.

Market expectations are measured by available analysts' forecasts.

Thus, newness is defined as the deviation between the management

forecast and analysts' forecasts available at the time of the

management forecast release. Imputed accuracy is measured by the

revision of analysts' forecasts towards the management forecast. In

effect, a forecast is considered to possess a high level of imputed

accuracy if analysts revise their estimates of earnings per share

closer to that of management.

This study provides empirical evidence aimed at answering the

following four related research questions.

1. Do management earnings forecasts provide information in

excess of that already available in the market and

presumably incorporated into analysts' forecasts?

2. Do management earnings forecasts which merely confirm

investors' expectations result in an upward stock price

revision? In other words, does the forecasting action by

itself convey favorable information to investors.

3. Does the information content, if any, depend upon the

levels of newness and imputed accuracy ascribed to manage-

ment earnings forecasts?







-9-





4. Do management earnings forecasts convey information

pertinent to establishing equilibrium prices of

non-forecasting firms in the same, or similar, industry?
















CHAPTER II


PRIOR RESEARCH ON THE INFORMATION CONTENT
OF MANAGEMENT FORECASTS OF EARNINGS



Empirical research directly concerned with the information

content of management forecasts has been relatively scarce. As stated

earlier, the majority of the empirical research to date deals with the

absolute and relative accuracy of management forecasts on an ex-post

basis.

Six published studies comprising the major empirical research

on the information content of earnings forecasts by managements are

identified and reviewed in this chapter. The purpose of this review

is to highlight the scope and limitations of the existing research on

the topic.



The Foster Study (1973)

This study examined the information content of estimates of

annual earnings per share by company officials. These estimates were

made after the end of the fiscal year but prior to the publication of


- 10 -






- 11 -


preliminary earnings per share (EPS). Thus, in effect Foster examined

the information content of unaudited EPS. This is evident from the

level of accuracy of EPS estimates. The average absolute percentage

error was 1.8 percent (p. 27). For all practical purposes, however,

such a minute error could be the result of the rounding of EPS

estimates by company officials.

The study examined 68 EPS estimates for the period 1968-1970.

The majority of estimates (87 percent) had a time-lapse between the

EPS estimates and the preliminary earnings announcement of 21 trading

days. The mean and the median for the time-lapse were 17 and 18

trading days respectively.

Foster tested for the individual and aggregate market behavior

using a methodology similar to that employed by Beaver (1968). Both

tests confirmed the hypothesis that the unaudited EPS convey

information to investors. Thus, abnormal returns can be achieved by

employing a trading strategy "based on knowledge of EPS estimates five

days before it is publicly released ." (p. 33).

The study utilized five annual and five quarterly naive models.

For each naive expectations model a first difference model was con-

structed. This resulted in a total of twenty models, ten level and

ten first difference. Forecasts were classified as positive (nega-

tive) news depending upon the sign of deviation from the naive expec-

tations model. Two purchase and short-sale strategies were adopted

for the positive and negative news forecasts respectively. The first







- 12 -


strategy was adopted five days prior to the EPS announcement to the

date the preliminary earnings report was announced. The second

strategy was adopted from the date the EPS estimate was announced to

the date of the preliminary earnings report.

The average abnormal return for the first trading strategy was

1.61 percent for the ten annual models and 1.48 percent for the

quarterly models. The average abnormal return for the second strategy

was much lower; 0.31 percent for the ten annual models and also 0.31

percent for the ten quarterly models. This result (p. 33) is

explained as follows:


Up to the time the company officials announce the
EPS estimate, there is still opportunity for an
abnormal return. ... .Once the official's EPS
estimate is publicly released, there is a stock
price adjustment such that trading strategy based
on that information yields lower abnormal returns.

The author points out, however, that abnormal returns "do not

indicate the extent to which the observed results were a general

pattern for all firms or was due to extreme observations" (p. 34). A

chi-square test was used to examine the frequency of abnormal

returns. One out of twenty models was significant at the .01 level;

two other models were significant at the .05 level and ten models were

significant at the .1 level. This result led to the conclusion that

estimates of earnings per share possess information content and that

the effect is a general pattern in the sample.







- 13 -


This study clearly highlights the effect of naive expectations

models on results obtained. Different models yield different results.

Although the author utilized a large number of models, the effect of

possible mis-classification of forecasts on the results of the study

remains unknown.



The Gonedes, Dopuch, and Penman Study (1976)

The purpose of this study was to evaluate the information

content of management earnings forecasts. The authors utilized a

methodology that (p. 107) "involves time-series analysis and tests for

information content." This required a series of forecasts for each

firm in the sample. Due to the fact that management earnings fore-

casts are not available from the same source and for several con-

secutive time periods, the authors used analysts' forecasts as

"proxies" for management forecasts.

The sample included 148 firms drawn from the set of firms

covered by the Standard and Poors Earnings Forecaster. One criterion

used in selecting the firms was that "each firm had to have con-

secutive forecasts from at least one source during the last half of

1967 and the last half of 1968" (p. 110). This approach led to

"having twenty-four forecasts for each of the 148 firms in the

sample" (p. 110).






- 14 -


Each firm's forecast was scaled by "the per share closing price

of the firm's common stock on the tenth trading day preceding the

forecast's publication date "(p. 113). Scaled forecasts were classi-

fied into four groups quartiless) according to the magnitude of the

scaled forecast. Portfolios were formed for each forecast date and

for each quartile (p. 113) "of the cross-sectional distribution of

scaled forecasts." One control portfolio, of equal size, was con-

structed to match each sampling portfolio. The result was 192 port-

folios (24 forecast dates x 4 quartiles x 2 portfolios), each composed

of 37 shares. All portfolios were minimum variance portfolios with

beta equal to unity.

The methodology used in this study is discussed in Gonedes and

Dopuch (1974), Gonedes (1975), and summarized in the current study

(pp. 111-114). Briefly, the approach involves a comparison of two

distribution functions; the first is the distribution of returns on

the sampling portfolios, and the second is the distribution of returns

on the control portfolios. Based on the assumption that the distri-

bution of returns is multivariate normal, the comparison involves

tests of equality of means and variances. However, an inequality

between the means of the two distributions is a sufficient condition

for the inequality of the two distributions. Accordingly, "only

results for tests on means are reported below" (p. 112).

Results of the study can be summarized as follows:






- 15 -


1 the null hypothesis of no information content was rejected

for the total sample. The value of the F statistic was

"substantially above the .995 fractile ." (p. 123).

2 disaggregating the data, the null hypothesis was rejected

for the first quartile (lowest scaled forecasts), but not

for the other three quartiles. This result led the authors

to conclude (p. 133) that:


our empirical results on income forecasts
are inconsistent with the statement that those
forecasts convey no such information. Moreover,
it appeared that much of the information content
of forecasted earnings can be ascribed to the
implication of extremely low (scaled) forecasts.
Forecasts not in this class seemed to reflect
little information beyond that already available,
such as the information reflected in available
forecasts of macro-economic conditions. This
observation seems to increase the importance of
assessing the extent to which substitutes are
available for forecasts of firms' earnings and the
properties of these substitutes.

3 testing for the effect of portfolio risk, the authors

reconstructed all sampling and control portfolios for

different levels of risk. They observed (p. 128) that:


In short it appears that the major effect of
letting risk depart from unity is to increase
dispersion, as measured by the generalized
variance. That implies that the value of risk
other than unity induces less powerful tests of
information content hypothesis than does risk
equal to unity. This is the major reason for our
heavy reliance on results for risk equal to unity.






- 16 -


4 disaggregating the total period into eight subperiods (30

observations each), the test results exhibited "a fair

amount of variability" (p. 130). This variability was

attributed, in part, to the increase in the estimated

standard error of the mean due to the decrease in the

number of observations. Although subperiod results "do not

seem to be consistent with the null hypothesis" (p. 130),

the value of the F statistic was below the .9 fractile for

four subperiods.

The above findings indicate that management forecasts of

earnings convey information not already available to investors. These

findings, however, should be tempered by the fact that the authors

utilized a proxy for management forecasts. Also, the data

were restricted to forecasts made during the second half of the fiscal

year. More importantly, however, the forecasts used were not

previously unavailable either from the same source or from some other

source (p. 109). That is, most of the forecasts were not first time

forecasts and were available to investors.



The Patell Study (1976)

This study examined 336 voluntary management forecasts of

annual EPS published in the Wall Street. Journal for the period 1963-

1968. Approximately 46 percent of the forecasts accompanied first and

second quarter results. The sample included 204 point or convertible






- 17 -


to point estimates and 132 of the form of greater (less) than X.XX

dollars (p. 250). the methodology utilized is essentially the same as

that of Beaver (1968) and May (1971). The study focused upon the

prediction error (abnormal performance), using the familiar market

model, for the forecast week as well as eight weeks prior to and eight

weeks after the forecast week.

The null hypothesis that the expected value of the prediction

error during the forecast week is equal to zero was rejected at a

statistically significant level, .0004. The null hypothesis could"not

be rejected at the .05 probability level for any other week in the

test period" (p. 260). Disaggregating the data the following results

were observed:

1 the mean prediction error for utility firms was much weaker

than that for non-utility firms.

2 the mean prediction error for forecasts that accompanied

quarterly earnings was weaker than it was for those that

were announced separately (p. 266).

3 the mean prediction error for open ended forecasts was

stronger than that for point estimate forecasts (p. 262).

4 the strongest mean prediction error was for forecasts

released during the third quarter. The prediction error of

the first and the second quarters exhibited a much weaker

effect and the null hypothesis of expected prediction error







- 18 -


equal to zero could not be rejected for the second quarter

at the .1949 level (see Table 4, p. 266).

Note also that first and second quarter forecasts account for

16 percent and 51 percent of the total sample respectively. The

explanation provided by the author for these results was that

(p. 266):


The firm-specific price changes are less signifi-
cant for first-quarter disclosure than for the
third-quarter disclosure, perhaps due in part to
greater overall market volatility in the first
quarter of December 31 fiscal years. However, the
second fiscal quarter results are even less
significant, and this cannot be easily attributed
to general market conditions.

The above results are somewhat perplexing and difficult to

explain given the methodology utilized in the study. Further

examination of the attributes of forecasts released at different time

periods (quarters) may provide an insight into the findings of this

study. The study intentionally avoided dealing with the imputed

accuracy attribute (p. 248), and the newness attribute was linked to

naive forecasting models. Accordingly, whether or not the varying

effects of each attribute provide a reasonable explanation of the

results obtained in this study remains an unanswered question.

Finally, the study examined the effect of deviations of

forecasts from investors' expectations. Three historically based

naive models were used as measures of investors' expectations.

Deviations from each model were ranked into high and low deviation

groups. The results were (p. 270):






- 19 -


The firms in the top 25 percent (firm forecasts
most exceeded naive expectations) experienced
significantly positive Uit values during the week
of forecast disclosure. However, the firms in the
bottom 25 percent (firm forecast was furthest
below naive expectations) also experienced (on
average) positive Uit; and for two of the three
naive forecasts, the average Uit had a positive
magnitude with a less than .02 probability of
occurrence.

Further examination of the forecast release week indicated that

(p. 270):


Thus, when attention is restricted to only the week
of forecast disclosure itself, there appears to be
very little to distinguish between forecasts on the
basis of sign or magnitude of the change in
investors expectations.

Although the sign of the prediction errors was positive for

both groups during the forecast week, examination of the eight week

period preceding the disclosure of the forecast revealed that

(p. 270):


Those firms whose management forecasts exceeded
market estimates appear to enjoy generally positive
price relative residual during the two months
proceeding the forecast announcement, while firms
whose forecasts fall short of market estimates
experience generally negative residuals during the
proceeding two months. However, the price-relative
prediction errors at the immediate announcement date
are positive for both sets of firms.

These findings were interpreted by Patell (p. 273) to be con-

sistent with the hypothesis that substitute sources of information are

publicly available to investors. However, the positive price revision

for the negative group during the forecast announcements week is

difficult to explain. One possible explanation offered by the author







- 20 -


(p. 273) is that the act of voluntary disclosure of earning forecasts

conveys information to investors. Whether or not the forecasting

action by itself conveys information is a research question that

requires further investigation.



The Jaggi Study (1978)

This study utilized daily residuals to examine the information

content of management forecasts of earnings. The sample consisted of

144 forecasts published during the first four calendar months of each

year for the period 1971-1974. The null hypothesis of no information

content was tested under the assumption of a symmetric stable distri-

bution. The daily residual for each stock was tested individually for

significance. This testing procedure covered the forecast date as

well as the ten days preceding and the ten days following the forecast

announcement date. The number of significant residuals for each day

was then tested under the assumption of a binomial distribution. The

author concluded that (p. 964):


The results show that statistically significant
price adjustments were evident on the day of
announcement of management forecasts and also
before and after this day.

Three annual naive forecasting models were used as a proxy for

market expectations. Forecasts were classified as positive or

negative depending upon the sign of deviation from the naive model.

Adopting a buy and short-sale strategy resulted in an abnormal return

for both groups.







- 21 -


Deviations from each naive model were ranked in defending order

and separated into two equal portfolios--top and bottom deciles. The

buy and short-sale strategy was repeated for stocks contained in both

the top and bottom portfolios. "This was motivated by the need to

determine whether stock market price behavior is directly related to

differences in expectations and forecasts" (p. 966). Results do not

indicate that the magnitude of deviation from naive models is related

to the size of abnormal returns. That is, the adoption of the buy and

short-sale strategy resulted in similar abnormal returns for both high

and low deviations from market expectations as measured by naive

models. Unfortunately, the study did not report the levels or the

signs of deviations from naive models for top and bottom portfolios.

Accordingly, interpretation of these results are somewhat difficult.

The author (p. 966) carefully provides the following interpretation of

the results:


In view of these results, it can be inferred that
voluntary disclosure of earnings forecasts may
provide some additional information to investors.
A caveat, however, is that even though price
adjustments were observed, this does not neces-
sarily imply that the contents of the forecasts
caused investors to revise their expectations.
These adjustments may be caused by other factors,
or even by the mere act of voluntary earnings
forecast announcements.


The Penman Study (1978)

This study examined two research questions. The first question

addressed the matter of full disclosure of earnings forecasts by all







- 22 -


firms in the economy. The second question examined the information

content of management forecasts of earnings.

The full disclosure is an adaptation of the incentive-sig-

nalling theory, mentioned earlier, to the capital market setting. The

theoretical argument developed by Penman is essentially the same as

that of Ross (1977). According to the incentive-signalling theory all

firms in the economy, except the one with the worst news in the

hierarchy, will be induced to disclose information relevant to the

valuation of their firms. The worst news firm will be revealed by

exception. Thus, full disclosure of inside information will result.

Penman examined the claim that "managements only publish fore-

casts when they have 'good news' and hence investors only receive

forecast information about firms which are doing relatively well"

(p. 5). In order to determine whether a firm is doing 'relatively

well' the author utilized a historically based martingale model with

drift as an earnings expectation model. The deviation between the

actual earnings for the year immediately prior to the forecast year

and the expectation model was calculated for 576 firms in the experi-

mental sample. The earnings deviations for each firm were then

standardized by the variance of prior years earnings. The standard-

ized deviations were ranked in defending order and divided into two

equal portfolios representing the top and bottom halves. Likewise,

newness of an earnings forecast was defined as the forecast deviation

from the expectation model. Following the same procedure, each of the







- 23 -


previous two portfolios were further divided into two portfolios based

on the ranked value of the standardized forecast deviations. This

classification scheme resulted in four portfolios of equal size.

The full disclosure issue was tested by comparing returns on

experimental and control portfolios. The total market index was used

as the control portfolio. Following Gonedes (1974, 1975) and Gonedes

et al. (1976), the author utilized the Hotelling T2 test as follows

(p. 40):


By using equal weights, the signals are 'averaged
out' so that it can be observed whether the infor-
mation sample differs from the market in terms of
attributes other than the signals.

Results were inconsistent with the full disclosure of earnings

forecasts by all firms in the economy. The four experimental port-

folios exhibited higher return than the market index used for control

even for low forecast portfolios. Examination of the data revealed

that (p. 39):


estimated return differences are positive
for all portfolios, reinforcing the belief that
the information sample as a whole is systemat-
ically different from the market. More specific-
ally, it appears to consist of firms whose return
performance is, on average, superior to that of
the market as a whole.

This finding should not be interpreted to mean that full dis-

closure of relevant economic attributes by all firms does not occur.

The appropriate interpretation, as pointed out by the author, is that

earnings forecasts by management is not the technology used by all

firms in the economy to signal their relevant economic attributes.







- 24 -


Other signalling technologies are available to firms which do not

issue earnings forecasts.

The second question examined in this study is the extent to

which management forecasts convey information beyond that which is

already public knowledge. Results of the Hotelling T2 test were

inconsistent with the hypothesis of no information content. Portfolio

by portfolio examination revealed that the information effect is

attributed to the two high forecast deviation portfolios. The

Hotelling T2 test, however, is not a direct test of information

content. Penman carefully points out that (p. 47):


The results of the T2 test suggest that earnings
forecasts passes information, in the sense that
foreknowledge of the forecast prior to the port-
folio holding period earns abnormal returns for a
given level of risk, on average. This does not
mean that the information is necessarily conveyed
to the market by means of the forecast. The
forecast is published, on average, about the
middle of the third fiscal quarter, so it is
possible that forecasts merely reflect information
which has become available through other signals
for example, interim earnings announcements.

Excess return tests were used to examine the information

content of management earnings forecasts. Daily abnormal returns for

a sample consisting of 1188 management forecasts were calculated for

121 days surrounding the forecast day. The sign of the abnormal

returns "indicate that the forecast announcements, on average, convey

information which is favorable to the firms that public them, relative

to the market's assessment prior to the announcement" (p. 51). The

cumulative abnormal returns indicate that (p. 53):






- 25 -


forecasting firms do, on average, enjoy
'good times' during the three months (approx-
imately) on either side of the forecast date, and
not only on the day of the forecast announcement.

A sample consisting of 725 management forecasts was disaggre-

gated into 'good' and 'bad' news forecasts depending upon the sign of

deviation from the expectations model. Results were summarized as

follows (p. 53):


'good' news firms apparently are continually
revalued upwards throughout the period and receive
a relatively sharp upward revaluation on or about
the date of the forecast. This is in contrast to
the 'bad' news group. They are subject to a
downward revaluation at the forecast date and, on
average, exhibit 'bad times' prior to the
announcement of the forecast.

The above findings indicate that 'good' and 'bad' news earnings

forecasts convey information to investors. It appears, however, that

the contents of these forecasts are properly anticipated by investors.

Stated differently, the anticipatory effect observed in this study

indicates that substitute information as to the content of the

management forecast of earnings is publicly available. The stock

price behavior of the bad news forecasts indicates that "incentive

exists for managements to publish forecasts which result in the

downward revaluation of their firms" (p. 54). This finding was

interpreted to be consistent with the iterative process of the

incentive-signalling theory which results in the disclosure of inside

information "irrespective of its implication for the value of the

firm" (p. 54). Atiase (1978, p. 22) provides a somewhat similar

interpretation of these results when he states:






- 26 -


even firms disclosing seemingly bad news may
be trying to prevent drastic downward price
revisions that the market might be making about
their prospects.

Finally, the author points out that the above results may be

influenced by other announcements accompanying earnings forecasts.

The tests were repeated after excluding forecasts which were

accompanied by other announcements. This reduced the total sample to

384 'good' news forecasts and 98 'bad' news forecasts. Results

differed little from the previous results for the unrestricted sample.



The Nichols and Tsay Study (1979)

This study examined the information content of management fore-

casts of earnings announced during the first half of the fiscal year.

The study covered a six year period beginning in 1968 and involved a

total sample of 83 forecasts. The selection criteria used for

inclusion in the sample differed from prior studies. The criteria

were set intentionally restrictive in an attempt to assure that "the

potential confounding influence of other types of information on the

results is less than in previous studies without such strict 'other

news' screening criteria" (p. 143). The selection criteria used in

the study were as follows (p. 143):


The forecast announcement must have been unaccom-
panied by other 'news' reports, and thus any firm
that had reported in the WALL STREET JOURNAL any
of the following was omitted from the study: (1)
annual or quarterly earnings reports or other
'news' within a week of the date the forecast was
published, (2) a stock split within eight weeks on
either side of the date of forecast, or (3) a cash
dividend within the week of forecast.







- 27 -


Two approaches were utilized to test the information content of

management forecasts. The first was the abnormal return method. For

each stock i, the absolute value of the residual for each time period

(eit) was calculated. The authors concluded that the average (et) for

the forecast week was larger than it was for the other sixteen weeks

in the test period.

The Kolmogorov-Smirnov one sample test indicated significance

at the 10 percent level. "Thus, while there is some evidence of

unusually large relative price changes during the announcement week,

the observed ranking was significant at the 10 percent level"

(p. 149).

The second approach utilized was an analysis of frequencies of

abnormal returns during the test period. The motive for the frequency

test is the belief that (p. 148):


very large abnormal returns of a few firms
may dominate averages of returns for a group of
firms. Although, again, this may be more of a
potential problem for small samples than for large
samples, the possibility exists in either. In any
event, analyses of averages may not reveal whether
observed abnormal return movements are pervasive
throughout the sample or whether they have been
produced primarily by a subset of the sample.
Analyses of frequencies will provide an indication
of the pervasiveness of any observed information
content.

The specific test used and the results are summarized as

follows (p. 148):







- 28 -


The weekly (eit)'s were ranked one through seven-
teen for each firm. If week-zero (eit) was the
largest for the seventeen-week period, a rank of
one was assigned; if it was the second largest, a
rank of two, and so on with the smallest receiving
a rank of seventeen. If very large relative
abnormal return movements occurred in period zero
as a result of reported forecasts, we might expect
an unusually large number of rank one's for period
zero, relating to the other week. The latter
possibility was easily checked and dismissed.

The apparent conflict between the results of the two tests

should be cautiously interpreted. The selection criteria allowed

other news to prevail during the sixteen weeks surrounding the fore-

cast week. Announcements of annual and quarterly earnings, cash

dividend, and other news were allowed to prevail except for the fore-

cast announcement week. Accordingly, the frequency test examined the

relative effect of management earnings forecasts on unexpected

earnings as compared to other news.

Six historically based naive models were used as a proxy for

current market expectations of earnings. Three of these models were

based on annual earnings, while the other three incorporated quarterly

earnings. Similar to Foster (1973), Patell (1976), and Penman (1978),

forecasts were classified as 'positive' or 'negative' news depending

on the sign of deviation from the naive model. Adopting a purchase

policy for the positive group and short-sale, for the negative group

eight weeks prior to the forecast announcements week resulted in

abnormal returns for both groups. "This would be consistent with the

statement that the executive forecasts possessed information content"

(p. 152).






- 29 -


A seventh group was constructed for comparison with results

reported by Patell (1976). An earnings forecast deviation was defined

as the difference between the forecast and the actual earning for the

previous year. Deviations were scaled by previous year's earning and

ranked in defending order. The top 50 percent were assumed to have

positive news, and forecasts in the bottom 50 percent were assumed to

have negative news. However, the sign of forecast deviation was

positive for both groups. The study reported a graphic presentation

of the cumulative average residuals without any statistical test. The

authors inferred that (p. 152):


The week-zero price movement is the largest weekly
movement for the purchase group, while for the
short-sale group week-zero has one of the smaller
movements. In contrast, Patell found relatively
large positive week-zero movements for both of the
groups.

Frequencies of gain and loss on both the purchase and

short-sale portfolios were examined jointly. The gain (loss) is

measured by the cumulative residual for the nine week period, up to

and including the forecast week.

The chi-square statistic was not significant at the 5 percent

level. The same analysis was repeated for the other six naive

forecasting models. The results were not significant for any of the

six models. These findings led to the conclusion that cumulative

average residuals are influenced by a small number of large residuals.







- 30 -


The above conclusion, however, should be tempered by the

methodological difficulties encountered in this study. Three main

deficiencies are worth noting. First, the gain (loss) on portfolios

was measured as a holding period return beginning eight weeks prior to

the forecast week. To the extent that other news were allowed to

prevail during that period, it would be inappropriate to attribute the

gain (loss) to the information content of management earnings fore-

casts. This is especially true given that the sample size of 83

stocks divided into two groups was not sufficiently large to randomize

the effect of other news. Second, the reliance on naive forecasting

models can result in misclassification of management forecasts, thus

adding another confounding effect to results of the frequency test.

Finally, there is no a priori reason to suspect that all management

forecasts convey information beyond that which is already available.

As demonstrated in the next chapter, the majority of management

earnings forecasts do not differ from publicly available analysts'

forecasts of earnings. Accordingly, the classification of forecasts

as either good or bad news is questionable, particularly when the test

involved is based on frequencies.



Summary and Limitations of Existing Research

Current research studies on the information content of manage-

ment forecasts support the contention that these forecasts convey

information in excess of what is already available to market






- 31 -


participants. One noted exception to this contention is the study by

Nichols and Tsay (1979). The behavior of stock prices prior to the

announcement date indicate an anticipation of the news released by

these forecasts. This is interpreted to mean that substitute

information to management earnings forecasts seems to exist and is

reflected in stock prices prior to the announcement of earnings

forecasts by management.

Conflicting results, however, have been reported with respect

to the information content of 'good' versus 'bad' news forecasts.

Findings of the Gonedes et al. study (1976) indicate that only 'bad'

news forecasts convey information, while results reported

independently by Patell (1976), Penman (1978), and Jaggi (1978)

indicate that both 'good' and 'bad' news forecasts convey information

not already available to investors.

A second area where conflicting results are observed is the bad

news earnings forecasts category. Patell reported an upward price

revision for the 'bad' news forecasts during the forecast week. This

is in contrast to Penman's study which reported a downward price

revision for this group on the day of the announcement as well as the

surrounding days.

The conflicts of research findings are not easily explainable

and may be attributed to several factor. One factor pointed out by

the empirical findings of prior research is the unreliability of

historically-based naive forecasting models as a proxy of market







- 32 -


expectations. Patell observed that "on average, the voluntarily

disclosed forecasts of earnings per share were greater than the naive

estimates of the market's expectations" (p. 268). Penman also

observed that "the earnings of forecasting firms are, on average,

higher than expectations and not representative of the market as a

whole" (p. 36). Thus, low earnings forecast portfolios (bad news

forecasts) are low relative to the sample studied but not low relative

to the measure of expectations. More importantly, however, the

empirical evidence provided by Gonedes et al., Patell, and Penman

suggest that substitute information for management forecasts is

publicly available. Naive forecasting models totally ignore informa-

tion available from sources other than past earnings and as such can

misclassify forecasts. This reasoning is supported by Atiase (1978,

p. 23) as follows:


Thus, it is easy to see the possible misclassifi-
cation that can result from relying on expecta-
tions models irrespective of predisclosure infor-
mation production and dissemination on or by a
firm.

Furthermore, all the relevant studies to date have classified

forecasts as either 'good' or 'bad' news forecasts and have ignored a

possible third classification for forecasts that do not deviate from,

or are approximately equal to, investors' expectations. The empirical

finding that substitute information for management forecasts is pub-

licly available provides support for the assertion that the majority

of management earnings forecasts do not deviate from investors'






- 33 -


expectations. This, of course, is an empirical question which has not

been examined. The validity of this assertion, however, adds further

evidence to the possibility of forecast misclassification by previous

studies.

Several research questions directly related to the information

content of management forecasts remain unexamined. Three of these

questions are of interest to this study. The first deals with the

information content of the voluntary forecasting action by itself.

That is, whether or not the voluntary forecasting action by itself

induces an upward stock price revision. On a theoretical basis it can

be argued that a management forecast which merely confirms investors

expectations of earnings reduces the variability associated with these

expectations causing a reduction of the risk attributed to the firm's

stock. This in turn causes a higher equilibrium value for the stock.

It should be noted, however, that this argument rests on the

assumption that inside information is perceived by investors to be

more reliable than information provided by outsiders to the firm, such

as financial analysts.1 Patell offered the possible effect of the

forecasting action as an explanation for the upward stock price

revision during the forecast week for the 'bad' news group.2 However,

the possible misclassification of forecasts and the conflicting

results of other studies highlight the need for a specific testing of

this proposition.

The second question is related to the effect of the perceived

accuracy of forecasts on their level of information content. Patell






- 34 -


points out that the imputed accuracy of an earnings forecast is an

attribute necessary to altering investors' expectations. Testing this

proposition, however, requires knowledge of investors' expectations

immediately prior to the earnings forecast announcement by management

and the revision of these expectations as a result of receiving the

earnings forecast. The reliance of prior research on naive fore-

casting models precluded empirical examination of the imputed accuracy

proposition.

The third question relates to the possible effect of earnings

forecasts on non-forecasting firms in the same industry. The

mechanism of the incentive-signalling theory alluded to earlier, and

the argument that a management forecast of earnings is a quantitive

assessment of several economic variables, some which are common to the

entire industry in which the forecasting firm operates, lead to the

assertion that the information content of an earnings forecast may

extend to other firms in the same industry. This assertion has not

been considered in the available empirical research on the information

content of management earnings forecasts.

To summarize, existing research findings support the contention

that management forecasts of earnings convey information to investors.

However, the anticipatory behavior of stock prices prior to the fore-

cast announcement date indicates that substitute information to

management forecasts do exist. The conflicting results reported in

the current literature may be attributed to several factors. The






- 35 -


reliance on naive forecasting models is one factor responsible for

misclassification of forecasts. The need for a more appropriate

measure of market expectations and hence proper classification of

forecasts is self evident. Moreover, the scope of available research

on the information content of management earnings forecasts has been

somewhat limited and several research questions remain unexamined.

The effect of the forecasting action by itself, the effect of the

imputed accuracy ascribed to forecasts, and the extent to which

management forecasts of earnings convey industry-wide information are

only three possible extensions to existing research. Examination of

these three extensions comprises the goal of this dissertation.














Notes


1. This argument follows directly from the properties of the capital
asset pricing model under the assumption that a reduction in the
variance associated with expected returns reduces the systematic
risk of the firm.


2. Jaggi (1978, p. 966) also points out the possible effect of the
forecasting action.














CHAPTER III


DATA, METHODOLOGY, AND STATISTICAL TESTS



This study explicitly considers the effects of newness and

imputed accuracy of management earnings forecasts on altering

investors' beliefs with regard to equilibrium stock prices. Opera-

tional measures of newness and imputed accuracy of management earnings

forecasts require a 'proxy' of investors' expectations before and

after the announcement of these forecasts. Publicly available fore-

casts of earnings by financial analysts seem to be an appropriate

measure of investors' expectations for four reasons. First, financial

analysts incorporate several factors in arriving at an estimate of

future earnings of a particular firm. The past earnings history of

the firm is only one such factor. Other external factors which have

impact on the potential profitability of the firm are also incorpo-

rated. Second, financial analysts communicate with managements

through interviews and private discussions and incorporate inside

information in their forecasts of earnings. Gonedes et al. point out

that (p. 108):


Indeed communication between management and ana-
lysts about forecasts seem to be one of the major
motivations for the SEC's current perspective on


- 36 -






- 37 -


forecast disclosure. .The use of such private
communication is also emphasized in a recent study
of earnings forecasts conducted by the Financial
Analysts Federation.

Third, the reliance of investors upon earnings forecasts published by

analysts as an input to investment decisions is widely supported.

Abdel-Khalik and Ajinkya (1979) point out that (p. 1):


the production of and demand for analysts fore-
casts clearly testifies to the importance of these
forecasts to the investment community.

Good (1975) explains the importance of the role of analysts to the

professional investors as follows (p. 42):


What ever the broad strategy used by the portfolio
manager, he is ordinarily dependent in varying
degree on analysts' recommendations concerning
individual stocks. He cannot accept analysts'
recommendations uncritically, but neither can he
investigate each security as thoroughly as the
analyst who specializes in the stock.

Fourth, the available empirical evidence suggests that earnings fore-

casts by analysts influence market prices of securities. Gonedes et

al. (1976) examined the information content of analysts' forecasts of

earnings and concluded that these forecasts convey information

relevant to establishing equilibrium prices of securities. A more

recent study by Abdel-Khalik and Ajinkya (1980) examined the informa-

tion content of analysts' revisions of earnings forecasts. The null

hypothesis of no information content was rejected at a statistically

significant level for the revision week. The hypothesis was rejected

for both positive and negative revisions.






- 38 -


To summarize, earnings forecasts published by financial ana-

lysts incorporate publicly available information as well as inside in-

formation privately communicated by managements. Moreover, empirical

research findings are consistent with the assertion that analysts'

forecasts are relied upon by market participants in making investment

decisions. Accordingly, analysts' forecasts of earnings represent a

reliable proxy of investors' expectations. This proxy is utilized in

this study to determine the newness and imputed accuracy of management

forecasts as defined in the following section of this chapter.



Data

The experimental sample of earnings forecasts was obtained by

searching the Wall Street Journal Index for eight years covering the

period 1970-1977. Only forecasts attributed to top management,

usually the president or the chairman of the board, were admitted into

the experimental sample. The following criteria were employed in the

sample selection process.

1 The forecast must be a point estimate or convertible to a

point estimate. The latter group are earnings forecasts

expressed either as a specific increase (decrease) over the

actual earnings of the prior years or as a range. Earnings

forecasts expressed as a range are bounded by a minimum and

a maximum value. These forecasts were admitted only if the






-39-


maximum value of the range did not exceed the minimum value

by more than ten percent. The mean value of the range was

considered to be the forecasted earnings. Open ended

forecasts in the form of greater (less) than a specific

amount were not included in the sample.

2 The forecast must not be accompanied by or fall within four

weeks prior to or four weeks after the date of any of the

following announcements:

a annual or quarterly earnings

b dividends

c stock splits

d capital issues.

3 Daily stock returns must be available on the daily CRSP tape

for at least one and one half years prior to the forecast

date and one year after the forecast date.

4 The forecast must be the first earnings forecast issued by

management during the fiscal year to which the forecast

refers. Second forecasts or forecast revisions by management

were excluded from the sample.

5 At least one analyst's forecast expressed in point form must

be available from the Standard and Poors Earnings Forecaster

within three weeks prior to the date of the management

forecast announcement. Another analyst's forecast must be

available no later than three weeks after the date of the

management forecast announcement. If two or more analysts'

forecasts were available, the one closest to the date of the







- 40 -


management forecast was selected. On very few occasions,

two or more analysts' forecasts appeared on the same date,

or very close together, in which case the mean value was

determined as the proxy for the market expectations.

The first criterion ensures that management forecasts of

earnings are quantifiable. The majority of forecasts predicted an

increase over the actual earnings of the prior year. Very few firms

predicted a decrease in earnings from the prior year. The second

criterion was imposed in an attempt to reduce the effect of other

announcements. It should be noted, however, that not all announce-

ments are published in the Wall Street Journal Index. The effect of

the undetected announcements should not influence the results of this

study. The large sample size utilized would be expected to randomize

the effect of these announcements over the test period. Penman (1978)

noted that other news announcements did not influence the results of

his study. The third criterion ensures that sufficient data are

available for statistical tests. The fourth criterion excluded

earnings forecast revisions by management in order to avoid the

possible confounding effects of mixing the two types of forecasts.

The fifth criterion is necessary for the operational measures of

imputed accuracy and newness of management earnings forecasts. Ana-

lysts forecasts prevailing within three weeks prior to the announce-

ment of an earnings forecast by management are considered a measure of

investors' expectations at that time. Similarly, analysts' forecasts

prevailing within three weeks after the announcement date are




- 41 -


considered a measure of investors' expectations conditional upon the

information revealed by management through the earnings forecast.

The selection criteria employed in this study are necessary to

reduce the confounding effects of other news and to focus on the

variables under examination. Nonetheless, as in the case for most

empirical studies, these selection criteria induce a bias towards

surviving firms. Criterion five induces another bias towards firms in

which analysts have exhibited interest.



The final experimental sample that satisfied the selection

criteria is composed of 401 earnings forecasts. Except for public

utility firms, no particular industry is over represented. This

observation is consistent with findings of prior studies. The sample

is not evenly distributed throughout the fiscal year and forecasts

tend to cluster in the fourth quarter. A monthly break-down of

forecasts is included in Table 3-1 below.

Table 3-1

Monthly Management Earnings Forecasts


Month in fiscal year 1 2 3 4 5 6 7 8 9 10 112

II I I I I I t I I
Number of Forecasts 5 12 30 40 143 27 1 18 16 41 1 58 51 (60

I P I T I 1 3I I I 1
Percent of Total I1.2 3.0 7.5 10.0110.71 6.714.5 14.0110.2114.5112.7115.0
I I I I I I I I I I I I







- 42 -


Definitions of Partitioning Variables

Newness and imputed accuracy of management forecasts of

earnings are operationally defined as follows:


Newness of a forecast = MF AP


Imputed accuracy


= MF AA


where


MF = management forecast of earnings,

AP = analyst's forecast of earnings prevailing within three

weeks prior to the announcement of the management

forecast, and

AA = analyst's forecast of earnings prevailing within three

weeks after the announcement of the management

forecast.


Experimental Portfolios

For the total sample, the mean and the standard

newness of forecasts are 0.0085 and 0.065 respectively.

the standard deviation for the absolute value of newness

0.05 respectively. This clearly indicates that the


deviation for

The mean and

are 0.042 and

majority of







- 43 -


management forecasts do not convey new information to investors.

Three portfolios were formed representing positive, negative, and

neutral news forecasts, depending upon the sign and the magnitude of

the level of newness. The positive news portfolio consists of 115

earnings forecasts with newness level > 3 percent, an arbitrary

choice. Similarly, the negative news portfolio consists of 85 manage-

ment forecasts with newness level< -3 percent. The neutral portfolio

consists of the remaining 201 management earnings forecasts.

The mean and the standard deviation for the absolute value of

imputed accuracy are 0.0198 and 0.045 respectively.

Observations in each of the three portfolios were ranked on the

level of imputed accuracy. If analysts revise their forecasts to

equal the forecasted earnings by management, the level of imputed

accuracy will be high and the results of Equation (2) will be zero.

The level of imputed accuracy of a positive news earnings forecast is

considered to be high if the result of Equation (2) was equal to or

less than 3 percent, and low if greater than 3 percent. The reverse

classification is true of the negative news forecasts. This classifi-

cation scheme yielded six portfolios. Table 3.2 presents the number

of forecasts in each portfolio.






- 44 -


Table 3.2

Imputed Accuracy and Newness of Management Earnings Forecasts



Imputed Accuracy POSITIVE NEGATIVE NEUTRAL



High 65 47 193



Low 50 38 8



Total 115 85 201


The neutral news low-level imputed accuracy portfolio contains

only eight forecasts. This result is not surprising, due to the fact

that this group of management forecasts represents a mere confirmation

of existing beliefs and, as such, no revision in analysts' forecasts

should be expected. The revision of the eight firms' forecasts may be

due to other factors that occurred within three weeks after the

announcement of the management earnings forecasts. This portfolio was

deleted from the study due to the small size of the sample.



Control Portfolios

For each experimental portfolio two control portfolios were

formed. The first control portfolio was selected by individually

matching each firm in the experimental portfolio with another firm,






- 45 -


for which no management forecast was known, from the same industry

classification. The matching was conducted using the first three

digits of the industry classification code. The selection of control

firms was random in the sense that any firm with the same industry

classification code had an equal chance of being chosen. Due to data

requirements, however, only firms with daily stock returns available

on the CRSP tape for the period 1970-1978 were admitted into the

control portfolio. If a firm did not satisfy the data availability

requirement another firm from the same industry classification code

was chosen at random. This process continued until all firms in the

experimental portfolios were individually matched. These control

portfolios are referred to hereafter as the matched control

portfolios.

The second set of control portfolios were randomly selected

firms without industry matching. To simplify the search process,

however, the matched control firms were randomly assigned to the

experimental firms. These control portfolios are referred to as

random control.

The matched control portfolios are designed to detect industry

effects and to assess the effect of management forecasts of earnings

on non-forecasting firms in the same, or similar, industry, the

random control portfolios are used to provide a bench-mark comparison

and to help detect industry effects.







- 46 -


Statistical Tests

Two statistical testing procedures are used in this study. The

first is residual analysis based on the familiar market model. The

second test involves a comparison of total returns of equal risk port-

folios. A two way analysis of variance is utilized for this test. The

use of two different testing procedures will indicate whether the

results obtained are sensitive to the statistical test used. Further-

more, two approaches to residual analysis are used to provide a

comparison with results reported by prior studies.



Residual Analysis

Information content can be attributed to management forecasts

of earnings if investors' beliefs with regard to equilibrium prices

are altered as a result of the information conveyed by these fore-

casts. Change in stock prices (and returns) during the forecast

announcements period is the empirical evidence of information content.

The returns observed on a security, however, cannot be totally

ascribed to a specific event, due to the fact that the return is also

influenced by economy-wide events affecting all securities. The

market model developed by Sharpe (1964) and Lintner (1965) is commonly

used to filter economy-wide factors. The market model is an ex-ante

relationship between the return on a specific security and the return

on the market portfolio. The model, however, is used on an ex-post

basis utilizing actual realizations of security returns to determine






- 47 -


abnormal performance. In this study, the market model is employed to

measure weekly abnormal returns using two related approaches. The

first approach measures standardized prediction errors and the second

examines the distribution of unstandardized errors during the forecast

period. While the latter approach is commonly used, the former is

theoretically more appropriate. The two tests are explained as

follows:



A Standardized Prediction Errors

This test was originally used by Beaver (1968) and expanded by

Patell (1976) using the market model which is given by:



Rit = ai+biRat+eit (1)

where

i = a firm index, i=1, ., N.

t = a week index for the non-forecast period, t=l, ., T.

Rit= the natural logarithm of the return on stock i for week t.

Rmt= the natural logarithm of the return on the market index

ai,bi the intercept and slope of the linear relationship

between Rit and Rmt.

eit = stochastic disturbance term for security i in week t.

Time series regression is performed on realizations of Rit and

Rmt to obtain estimates of ai and bi. These estimates are then used






- 48 -


to calculate the prediction error (abnormal return) for each stock i

and for 16 weeks surrounding the forecast announcements week

(hereafter called the test period). The prediction error is given by:



eit = Rit-ai-biRmt t = -8. .+8

The prediction error in the test period is assumed to be

normally distributed with the following properties:



E(eit) = 0 t = -8. .+8

Cov(eis,eit) = 0, s#t
citai s=t

ai2 is the variance of the regression during the estimation period.

The unbiased estimator of oi2 is si2 which equals:



si2 = ai2

T-2

Cit is the increase in the variance due to prediction outside the

estimation period. Cit = + 1+ (Rmt Rm)2
T t=1. .T
T
E (Rmt-Rm)2
t=l






- 49 -


The standardized prediction error during the test period is:


eit
Vit ~ t(T-2) (2)
si )cit

The cumulative standardized prediction error for the 17 weeks included

in the test period is given by:


L
C eit
WiL = t=1 ~ t(T-2) (3)
si /Lcit

where L < 17

Each eit is distributed independently of si2 and has a variance equal

to:

Ti-2

Ti-4



where Ti is the number of observations in the non-forecast period for

firm i. The prediction error is assumed to be an independent random

variable. According to the Central Limit Theorem, the cross-sectional

mean for any week t in the test period approaches a unit normal

distribution. The normalized sum can be expressed as:


N
E Vit
Zvt = i=l (4)
N Ti 2 )
i=l Ti 4







- 50 -


Similarly, the cross-sectional cumulative prediction error for week t

is


N
E WiL
ZwL = i=1 (5)
N Ti 2 \

i=l Ti 4



Equations (4) and (5) can be used to test the hypothesis that the

cross-sectional standardized prediction error is significantly

different from the expected mean of zero. One or two sided tests can

be performed, depending on whether an expected direction of eit can be

specified ex-ante. A statistical test that abstracts from direction

can be constructed directly from equation (2). Squaring Equation (2)

yields:


(eit)2
(Vit)2 = ~ F (1,Ti-2) (6)
si t

and

(eit)2
E = Ti 2
E si2cit 2 (7)
Ti 4



Equation (7) can be standardized to yield an expected value of 1. the

standardized statistic is:






- 51 -


Uit = (eit)2 Ti 4

sicit Ti 2

E(Uit) = 1

2(Ti 3)
VAR(Uit) =
Ti 6

Again, by applying the Central Limit Theorem, a unit normal cross-

sectional statistic can be constructed as follows:


N
E (Uit-1)
Zut = i=1 (8)
N ( 2(Ti-3)

i=1 (Ti-6)



Statistical tests developed in this section involve testing the

mean of the distribution of prediction errors under the normality

assumption. Nichols and Tsay (1979) questioned the validity of these

tests and pointed out that the mean may be influenced by a small

number of large prediction errors. To examine this claim, tests are

repeated after trimming the distribution by 10 percent on each side.

This test will indicate whether the observed effect is a general

pattern or merely due to a few extreme observations.

Another test similar to that used by Penman (1978) can be

developed as follows:






- 52 -


it ~ t (T-2)

V = 1 2 V.
N- Vit
N




E(Vt) = 0



Var (Vt) = at2

by appeal to the Central Limit Theorem (Vt //N)/I is approximately

standard normal distribution for large N. A Z test can be conducted

for each week in the test period. This test provides a comparison

with results reported by Penman (1978) and indicates the sensitivity

of results to the statistical test used.2



B Unstandardized Prediction Errors

As stated earlier, this test is commonly used in accounting

research. Foster (1973), Jaggi (1978), and Nichols and Tsay (1979)

utilized unstandardized prediction errors (eit). This test also

assumes cross-sectional independence and normal distribution of the

prediction error with a mean equal to zero. A normal distribution

test is used to examine the hypothesis that the mean value et is equal

to zero. Results of this test will be reported for comparison with

prior studies.



Analysis of Variance

An analysis of variance test is used in this study to examine

the information content of management forecasts of earnings using






- 53 -


actual returns observed on securities during the forecast announcement

week and the ten surrounding weeks. This test is designed to

supplement results of prediction errors tests and to provide a

comparison between results obtained using a different variable for

each test. In addition, the use of actual stock returns reduces the

reliance on the market model.

A two-factor analysis of variance is performed on the stock

returns of each experimental portfolio and its designated control

portfolios. The first factor is the type of portfolio and contains

three levels (i.e., experimental, matched control and random control).

Distinctions among the three portfolios are based on the information

set affecting each portfolio. Publicly available information

influencing stock returns is composed of three general components:

firm specific, industry specific, and economy-wide information. The

firm specific information distinguishes the experimental portfolio

from the two control portfolios. The industry specific information is

common to both the experimental and the matched control portfolios but

not to the random control portfolio. This provides a distinction

between the matched control and the random control portfolios. In

short, the three portfolios are influenced by different sets of

information and as such are viewed as three levels of the type of

portfolio factor.

The second factor is the new information effect and contains

eleven levels, t = -5 to t = +5. The forecast announcement week,







- 54 -


t = 0, is only one such level. Prior research indicates that the

information contained in earnings forecasts is partially anticipated

and influences stock returns prior to the forecast announcement date.

This implies a general flow of information produced and disseminated

by insiders and/or outsiders to the firm. Thus, the level of new

information made publicly available is distinguishable on a weekly

basis. It is important to note that stock returns observed every week

are influenced by the new information made public during that week and

not by the information revealed during prior weeks. This interpre-

tation follows directly from the empirical evidence of stock markets

efficiency in the semi-strong form, which asserts that stock prices

(returns) adjust instantaneously to all publicly available informa-

tion. Without the semi-strong form efficiency, the analysis of

variance tests would be questionable due to lack of independence among

weekly information effects.

Portfolio returns are not, strictly speaking, comparable

because of varying levels of systematic risk. To overcome this

difficulty, the systematic risk for all portfolios is equated to

unity. The procedure used is developed by Gonedes (1974) and involves

the following steps for each portfolio:

1 The systematic risk (beta) for each stock is calculated and

then ranked in defending order.

2 Two portfolios are constructed representing the top and

bottom halves of the ranked stocks. The mean beta for each

of the two portfolios is then calculated.






- 55 -


3 To determine the weights to be assigned to stock returns of

the top and the bottom portfolios, the following equation

is solved:

B1X + B2 (1 X) = 1

where

B1 = the mean beta for the top portfolio

B2 = the mean beta for the bottom portfolio

X = the weight to be assigned to stock returns of the top

portfolio

(1-X) = the weight to be assigned to stock returns of the bottom

portfolio

For all portfolios, the weights were between 40 and 60

percent. This result is consistent with results reported by Gonedes

(1975). After restating all stock returns, the following two factor

linear model is used:

Rjik = u + Pi + tk + Yik + ejik

where

u = the grand mean

Pi = Portfolio effect, i=1, 2, 3

tk = the information effect, k=l,. ., 11

Yik = the interaction effect

ejik = random error term.

The analysis of variance test examines the overall equality of

means. If the overall hypothesis is rejected, further investigation

will be required to determine which of the thirty-three means, or







- 56 -


combination of means, are causing the rejection of the overall

hypothesis. The Duncan's multiple range test is used for comparison

of all means.



Hypotheses



A Testing the Effect of Forecasting Action

The neutral news forecasts convey a very low level of new

information to investors and as such should not be associated with

abnormal returns unless the forecasting action by itself does in fact

alter investors expectations. Thus, testing the effect of the fore-

casting action involves an examination of the behavior of prediction

errors associated with the "neutral" news earnings forecasts. It has

been argued that a neutral forecast may reduce the variance of

expected future returns and as such cause the price of the stock to

move to a higher equilibrium price. The validity of this argument

hypothesizes a positive mean prediction error for this group. The

following three tests are conducted on prediction errors:

Hol: The mean value of vt during the forecast disclosure week

is equal to zero

Hal: The mean value of vt during the forecast disclosure week

is greater than zero

Ho2: The trimmed mean value of vt during the forecast

disclosure week is equal to zero






- 57 -


Ha2: The trimmed mean value of vt during the forecast

disclosure week is greater than zero

Rejecting both Hol and Ho2 will indicate that the forecasting

action by itself conveys information favorable to stock prices and

that the effect is a general pattern of the sample, and vice versa.

If Hol is rejected but Ho2 is not rejected, this would mean that the

test is influenced by a few outliers. Failing to reject both Hol and

Ho2 would indicate that the forecasting action conveys no information

to the market. Results will be reported for the seventeen weeks in

the test period and for the experimental as well as the control

groups. Two other tests are conducted on the distribution of the

residuals and prediction errors respectively, (hereafter called

distribution tests), as follows:

Ho3: The mean value of et during the forecasts disclosure week

is equal to zero

Ha3: The mean value of et during the forecasts disclosure week

is greater than zero

Ho4: The mean value of vt during the forecasts disclosure week

is equal to zero

Ha4: The mean value of vt during the forecasts disclosure week

is greater than zero.

The analysis of variance test is conducted on portfolio returns

to test the following four hypotheses:






- 58 -


Ho5: The means of the three portfolios are equal

Ha5: The means of the three portfolios are not equal

Ho6: The means of the eleven information treatments are equal

Ha6: The means of the eleven information treatments are not

equal

Ho7: There is an interaction effect between the portfolio

effect and the information treatment effect

Ha7: There is no interaction effect

If the overall hypothesis of equality of means is rejected, the

following Duncan's Multiple Range Test will be examined.

Hog: All thirty-three means are equal

Hag: All thirty-three means are not equal.



B Testing the Effect of Newness of Earnings Forecasts

Two experimental portfolios are classified as high-level

newness portfolios: the positive and the negative news portfolios.

For each of the two portfolios the direction of abnormal returns can

be specified ex-ante and as such the alternative hypotheses should be

stated with the proper direction. That is, the alternative hypotheses

for abnormal returns tests should be greater (less) than zero for the

positive (negative) portfolio. The same eight hypotheses already

stated in conjunction with the "neutral" news portfolio are utilized

to test the effect of newness.







- 59 -


C Testing the Effect of Imputed Accuracy

As stated earlier, each of the two high-level newness

portfolios is subdivided into two unequal portfolios based on the

degree of imputed accuracy ascribed to the management forecasts of

earnings. Testing the effect of imputed accuracy is accomplished by

separate examination of results for the high and low imputed accuracy

portfolios. The same eight hypotheses are tested for each group.

Further, abnormal returns for the high-level and low-level imputed

accuracy portfolios for each week in the test period can be compared

under the assumption of cross-sectional independence. Three

statistical tests can be developed for comparison between abnormal

returns of the two types of imputed accuracy portfolios. The first

test follows directly from Equation (4). The difference between

standardized prediction errors for unequal samples is given by:

N1 N2
1 E 1 E Vj,
N i=1 Vit N2 j=l
ZdV, = (9)
1 N1 Ti-2 1 N2 T-2 1
N + + N 2 TZ 2
i=l Ti-4 j=l Tj-4
i1 j_4



where N1, and N2 are the number of firm forecasts designated as

hihg-level and low-level imputed accuracy respectively. Equation (9)

can be used to test the following two null hypotheses for the total

and the trimmed standardized prediction errors:






- 60 -


Hog: Zdvt during the forecast announcements week is equal to

zero

Hag: Zdvt is greater (less) than zero for the positive

(negative) forecasts.

Hol0: Zdvt for the trimmed standardized prediction errors during

the forecast announcements week is equal to zero

HalO: Zdvt for the trimmed standardized prediction errors during

the forecast announcements week is greater (less) than

zero for the positive (negative) forecasts.

The second test is designed to examine the observed distribu-

tion of weekly standardized prediction errors. The Z statistic for

the difference between the two means is given by:


1 N1 N2
N1 Z Vit 1 Z vj
i=1 N2 j=l
Zdvt = (10)

SN~it + S2jt i

N2



where Si2 and Sj2 are the weekly variances of the observed distribu-

tion of standardized prediction errors associated with the high-level

and the low-level imputed accuracy portfolios respectively. The third

test examines the distribution of unstandardized prediction errors

(et) and is given by:






- 61 -


1 N1 I N2

N1 eit N2 E ejt

i=l j=1

Zdet = (11)



K 2it K 2jt



N1 N2



where Ki2 and Kj2 are the weekly variances of the observed

distribution of unstandardized errors associated with the high-level

and low-level imputed accuracy portfolios respectively.

The following two null hypotheses are examined:

HOll: Zdvt during the forecast announcements week is equal to

zero

Hall: Zdvt during the forecast announcements week is greater

(less) than zero for the positive (negative) forecasts.

Ho12: Zdet during the forecast announcements week is equal to

zero

Hal2: Zdet during the forecast announcements week is greater

(less) than zero for the positive (negative) forecasts.

D Testing the Effect on Other Firms in the Same Industry

This hypothesis is examined by comparing the behavior of

abnormal returns and total stock returns of the matched control

portfolio to the other two portfolios--the experimental and the random

control.






- 62 -


As already stated, the random control portfolio is used to provide a

bench-mark comparison and to help detect economy-wide effects. The

comparison between the matched control portfolio and the experimental

portfolio will indicate the extent to which management forecasts

convey industry-wide information. If management forecasts of earnings

do in fact convey substantial industry-wide information, the abnormal

returns, and the total returns, of the matched portfolio should be

influenced in the same direction as the experimental portfolio during,

but not prior to, the forecast announcements week. On the other hand,

if significant abnormal returns are associated with the matched

control portfolio, but not the experimental portfolio, prior to the

forecast announcements week, and both portfolios exhibit significant

abnormal returns during the forecast announcements week, the inference

of industry-wide effect would not be justifiable. A more appropriate

inference would be that industry factors induce managements to issue

earnings forecasts in an attempt to revalue their firms relative to

other, non-forecasting, firms in the same industry. That is, the

observation of abnormal returns associated with the matched control

portfolio during the forecast announcements week is a necessary but

not a sufficient condition for the inference of industry-wide effects

of management forecasts of earnings. Examination of the behavior of

abnormal returns associated with each of the two portfolios prior to

the forecast announcements week will indicate whether management

forecasts of earnings convey industry-wide information or whether

industry factors induce managements to issue earnings forecasts.






- 63 -


The first eight hypotheses were tested for the three portfolios

to determine the effect of management forecasts on each portfolio and

to provide the comparison among the three portfolios necessary for

detecting the industry-wide effects.










Notes


1. The regression was performed on actual weekly realizations of
Ritand Rmtfor two hundred weeks prior to the test period.


2. Prediction errors tests assume stability of regression coeffi-
cients, a and b, during test period. Systematic violations of
this assumption biases the observed prediction errors during the
test period. In this study, such bias is not expected to be
systematic in nature for four reasons. First, the experimental
sample was drawn from observations which occurred at different
time periods, (8 years X 52 weeks), and as such any shift in the
regression parameters would not be expected to take a systematic
form. Second, the test period is relatively short (17 weeks) to
induce a serious shift in regression parameters. Third, the use
of two time matched control groups will highlight whether or not
any systematic bias in prediction errors did in fact take place.
Fourth, the large sample size utilized in this study would be
expected to randomize the effect of any shift in regression
parameters.















CHAPTER IV


RESULTS



Introduction

The first three research questions addressed in this study

examined the effect of newness and imputed accuracy of management

forecasts of earnings on equilibrium stock prices of forecasting

firms. The fourth research question examined the effect of management

earnings forecasts on equilibrium stock prices of non-forecasting

firms in the same, or similar, industry. On an a priori basis it can

be argued that the effect of management earnings forecasts on non-

forecasting firms is positively related to the level of newness as

well as to the level of imputed accuracy ascribed to these forecasts.

Accordingly, the effect on non-forecasting firms was examined in

conjunction with the first three research questions. This procedure

of joint examination of hypotheses provides a more comprehensive

analysis of results and avoids repetition in discussing the

implications of the empirical findings of this study.

Results are reported in this chapter for the total sample,

followed by results for the first three research questions; these are


- 64 -







- 65 -


examined in conjunction with the effect on non-forecasting firms. The

total sample represents an aggregation of different, and opposing,

classifications of management earnings forecasts and, therefore, the

results obtained are difficult to interpret. These results are

reported here, however, for comparison with prior studies and are

limited to standardized prediction errors tests.



Total Sample

The total sample consists of positive, negative, and neutral

management earnings forecasts and, as a result, the direction of

prediction errors cannot be specified ex-ante. A statistical test

that abstracts from direction (Zut) is given by equation (8) and

follows from squaring the standardized prediction errors.

Table 4-1 reports the Z values for standardized prediction

errors (Zvt), the mean value of the squared standardized prediction

errors Ut, and Zut for all three portfolios. The Zvt statistic

indicates rejection of the null hypothesis of no information content

during the forecast announcements week, t and week t+6 for the

experimental portfolio. The null hypothesis could not be rejected for

the matched control portfolio during the forecast announcements week

or any other week in the test period at a statistically significant

level. The null hypothesis is rejected, however, for the random

control portfolio during weeks t-1 and t+3, but not during the

forecast announcements week.






- 66 -


0 -l -i O .O N- 0 -A 0 0 0 0 -<
I I I I I





S 0 s 7 4 0 I. l 7 0 ..




'0 I !0'0 0 0 4N NU


0 0-ll -4 4'I 4 -4 0 0 '-0 O0 0 0 0 N '0


I I I


i O N 0 N S U, U, '0 m p N -
N .- o 0 .4 .-4 0 '0 .- .o U N O 0
I I I I I I I






Ue, o O 0 N o U, .- .

0 0 0 04o 0 0o o. 4 .


4M 'r 0 0 .7 0%
0% -4 .0 0 0< 0

S000 I I I
I I I I I


00% 0 0 4'.> r N
0 '0 0 N 0 .< '.0 0

I I I I


m 0 0 a '0 Ur 0 0 0 '0 0 C'4 .7 '.0 0T% 4t N
u f '00 O Q 4*1 .- .4 C% 44 I( Up
N 0 0O NO '-40 '0 Nt f- N N NO -4
I I I I I I I




El
4'(-. U, r-. '0 0% '0 0 r. ..t 0r C'. cM ct f. N' i, 4
0% 0% 0 0 .- 0t 4 0% O f 0 r. a 0o 0 % o4 4
'4
a LJ *







r- U 0 a 41-40N 0N N o 0 -4ON -
S|3 0 0 4 N 0 0 0 0 0 0 0 0 4
N4 -0 00 0 N 0 0 0 0 DF r
4 I I I I I





44 0 r. '. 1% - iu a p O *n I I I ~ Ct c ( r m o rI I
I1___


JJ

N



'3

t0


'U -


- N
'U
u b
00


ca

'U
Dl
m





I I






- 67 -


The Zut Statistic should be cautiously interpreted for two

reasons. First, Zut is considered a test of the increased variance

during the test period only under the assumption that the expected

value of prediction errors is equal to zero. Accordingly, the

variance change interpretation for weeks which exhibit prediction

errors significantly different from zero is inappropriate (see Patell

1976, p. 261). Second, as would be expected when dealing with squared

values, Zut values are sensitive to a small proportion of large

prediction errors.

Results reported in Table 4-1 indicated that only the matched

control portfolio exhibits an increase in the variance during the

forecast announcements week unaccompanied by a mean prediction error

significantly different from zero. Furthermore, the observed increase

in the variance of prediction errors associated with the matched

control portfolio during the weeks immediately following the forecast

announcements week are considerably larger than those associated with

the other two portfolios. This indicates information effects during

these weeks for the matched control portfolio. Statistically

significant values of Zut unaccompanied by mean prediction errors

significantly different from zero indicate change in the variance and

signals rejection of the null hypothesis of no information content.

Disaggregation of the total sample is necessary to determine which of

the three classifications of management forecasts of earnings, or what

combination, is causing the observed information effects. Further-

more, removal of outliers is necessary to determine whether the

observed effect is also the general pattern of the sample.






- 68 -


Examination of the total sample was motivated by the need to

highlight the extent to which the sample of management earnings fore-

casts used in this study is similar to those used in prior studies.

Since prior studies did not utilize control groups, the comparison is

limited to the experimental portfolio. The following findings are

consistent with those of prior studies:

1 the observed mean prediction errors during the forecast

announcements week is statistically significant and

positive. This result indicates that, on average, manage-

ment forecasts of earnings are accompanied by an upward

stock price revision. This result is consistent with those

reported by Patell (1976) and Penman (1978).

2 the observed Ut values for weeks immediately following the

forecast announcements week are less than unity, indicating

a reduction in the variance for these weeks. This result

is consistent with findings reported by Patell (1976,

p. 261).



The Effect of the Forecasting Action

The neutral portfolio of earnings forecasts was examined to

determine whether the forecasting action by itself conveys favorable

information to market participants. Table 4-2 reports the Z values

for standardized production errors and cumulative prediction errors

for the three portfolios. The null hypothesis of no information

content, H01, was rejected at the 0.05 level for the experimental

portfolio during the forecast announcements week, whereas the two




- 69 -


Table 4-2

Total Neutral
Values for Zvt and ZWL


Week Experimental Matched Control Random Control
Zvt ZWL Zvt ZWL Zt ZWL


0.43
-1.07
0.50
0.75
0.28
0.60
0.88
0.56
1.93*
-0.51
-0.12
0.16
-0.78
1.22
0.91
0.81
0.94


0.43
-0.45
-0.08
0.31
0.40
0.61
0.90
1.04
1.62
1.38
1.27
1.27
1.00
1.29
1.48
1.64
1.82*


0.39
0.73
0..20
0.19
-0.84
-1.32
-0.77
0.18
-0.66
-0.20
-1.28
0.45
0.50
1.47
1.82*
0.17
0.99


0.39
0.79
0.76
0.76
0.30
-0.27
-0.54
-0.43
-0.63
-0.66
-1.02
-0.85
-0.67
-0.26
0.22
0.26
0.49


-1.84
0.68
-0.73
-0.93
0.31
1.05
0.69
0.23
-1.17
0.09
0.33
-1.64
1.04
-1.49
-0.58
0.38
2.60*


-1.84
-0.82
-1.09
-1.41
-1.12
-0.60
-0.29
0.19
-0.57
-0.51
-0.39
-0.84
-0.52
-0.90
-1.02
-0.90
-0.24


* Significant at the 0.05 level


L I I I I






- 70 -


control portfolios exhibited negative mean prediction errors during

the same week. Table 4-3 contains the Z values for the distribution

of weekly unstandardized prediction errors (et) and standardized

prediction errors (Vt). The results of the distribution tests

indicate rejection of the null hypotheses during the forecast

announcements week at the 0.07 and 0.05 level of significance for et

and vt respectively. These results suggest that the forecasting

action by itself has favorable implications for stock prices of

forecasting firms. Figure 4-1 portrays the behavior of cumulative

average standardized prediction errors during the test period. The

behavior of the prediction errors indicates that the experimental

portfolio enjoys a higher abnormal return relative to the two control

portfolios during the test period.

The trimmed mean test was conducted to determine whether the

observed effect was a general pattern of the experimental portfolio or

was due to the influence of a few large outliers. Table 4-4 reports

the Z statistic for the trimmed mean of standardized prediction

errors. The null hypothesis of no information content could not be

rejected for the forecast announcements week or any other week in the

test period at a statistically significant level. It should be noted,

however, that the largest positive weekly mean prediction errors were

observed during the forecast announcements week. These results lead

to the conclusion thatthe forecasting action by itself induces an

upward stock price adjustment, although such adjustment is not

statistically significant. The cumulative trimmed abnormal returns

associated with the experimental portfolio were larger than those

associated with the two control portfolios.




- 71 -


Table 4-3

Total Neutral
Values for Zet and Zvt


Week Experimental Matched Control Random Control

Zet Zvt Zet Zvt Zet Zvt


0.48
-0.79
0.38
0.60
0.81
1.04
0.77
1.02
1.52
-0.83
-0.21
0.61
-1.20
1.28
1.11
0.36
0.92


0.52
-1.17
0.17
0.93
0.67
0.67
0.82
0.33
1.72*
-0.53
-0.06
0.24
-0.94
0.99
1.15
0.16
0.81


-0.16
-0.18
0.44
-0.68
-0.61
-1.37
-0.25
0.49
-0.56
-0.49
-1.09
-0.08
-0.55
0.87
2.11 *
0.13
1.58


-0.12
0.65
0.20
-0.25
-0.87
-1.36
-0.85
0.19
-0.69
-0.20
-1.39
-0.44
-0.50
1.43
1.95*
0.19
0.95


-1.91
0.87
-1.12
0.34
0.87
0.15
-0.56
-0.03
-1.51
0.56
0.03
-2.12
0.85
-1.70
-0.75
-0.43
2.88*


-1.95
0.75
-0.66
0.11
0.32
0.63
-0.65
0.22
-1.20
0.09
0.36
-1.80
0.96
-1.49
-0.57
-0.35
3.35*


* Significant at the 0.05 level




- 72 -


1.00-

0.90

0.80

0.70

0.60

0.50

0.40

0.30

0.20-

0.10-

o. -8 N .0 -5 -4 0 1 2 3 4 5/ 6 7 8
-o0-".. ........ ,.. ,. **". / "
-0.20 **... *, ,-- *
**.....*
-0.30 -

-0.40

-0.50

-0.60-
Experimental
-0.70- Match Control -
Random Control ***
-0.80-

0.90-

1.00-

Figure 4-1
Neutral Group
Cumulative Standardized Prediction Errors (27 7)
1.1





- 73 -


Table 4-4

Total Neutral Trimmed Mean
Values for Zvt and ZWL
vt WL


eek Experimental Matched Control Random Control

Zvt ZWL Zvt ZL Zvt ZWL


0.62
-0.81
0.64
1.19
0.78
0.90
0.74
0.34
1.23
-0.45
-0.21
0.26
-1.11
1.15
0.69
0.77
0.83


0.62
-0.13
0.26
0.82
1.08
1.34
1.54
1.56
1.87*
1.64
1.50
1.51
1.14
1.41
1.54
1.68*
1.83*


-0.17
0.03
0.17
0.44
0.36
-1.02
-0.83
0.32
-0.54
0.16
0.99
-0.25
-0.12
0.69
1.50
0.62
0.79


-0.17
-0.09
0.02
0.24
0.37
-0.08
-0.38
-0.25
-0.41
-0.34
-0.03
-0.10
-0.04
0.06
0.45
0.59
0.76


-1.86
0.55
-0.83
-0.71
0.23
0.87
-0.54
0.26
-1.01
0.11
0.12
-1.21
0.87
-1.57
-0.55
-0.40
1.02


-1.86
-0.93
1.24
-1.43
-1.17
-0.72
-0.87
-0.72
-1.01
-0.93
-0.85
-1.16
-0.87
-1.26
-1.36
-1.42
-1.13


* Significant at the 0.05 level






- 74 -


Results of the two-way analysis of variance are reported in

Table 4-5. The null hypothesis of no difference among the means of

the three portfolios was rejected at the 0.036 level. The actual

risk-adjusted returns on the experimental portfolio over the entire

test period were considerably higher than those achieved on the two

control portfolios. These results support the earlier finding that

the abnormal returns on the experimental portfolio were larger than

the abnormal returns achieved on the two control portfolios during the

test period.

The null hypothesis of no difference among the eleven informa-

tion treatment effects and the null hypothesis of no interaction

effect could not be rejected at a statistically significant level.

The Duncan's Multiple Range Test was used to test the null hypothesis

that all thirty-three means are equal. This hypothesis could not be

rejected at the 0.05 level. These results suggest that the fore-

casting action by itself does not result in an upward stock price

revision significantly different from that occurring at random.

With respect to the industry-wide effect, the forecasting

action by itself does not convey favorable information to non-fore-

casting firms in the same, or similar, industry. The prediction

errors associated with the matched control portfolio were negative

during the forecast announcements week. The behavior of the

cumulative prediction errors prior to the forecasts disclosure week

does not indicate that the forecasting action was motivated by

industry-wide factors.




- 75 -


Table 4-5

Total Neutral Analysis
of Variance


Test F-Value PR>F


Type of portfolio effect 3.33 0.036


Information treatment effect 0.26 0.990


Interaction effect 0.87 0.624


Comparison of all means 0.83 0.73






- 76 -


To summarize, results of prediction errors tests indicate that

the forecasting action by itself results in statistically significant

abnormal returns during the forecast announcements week. The two-way

analysis of variance test, using total stock returns, provided a

contradictory result. Both of these tests, however, are sensitive to

the existence of outliers. Removal of outliers changed the conclusion

of the prediction errors test. The results of the trimmed prediction

errors test support the conclusion that the forecasting action by

itself does not result in a significant upward stock price revision.

All tests, however, suggest that abnormal returns, and actual

portfolio returns, during the test period are larger for the

experimental portfolio than for the two control portfolios. Finally,

the forecasting action by itself neither influences stock returns of

non-forecasting firms, nor is it motivated by industry-wide factors.



The Effect of Newness of Management Earnings Forecasts

The positive and the negative portfolios are the two high-level

newness portfolios. Results are reported below for each individual

portfolio.



A The Positive Portfolio

Table 4-6 reports the Z statistic associated with standardized

prediction errors for each of the three portfolios. Figure 4-2

portrays the behavior of the cumulative standardized prediction errors





- 77 -


Table 4-6


Total Positive
for Zvt and


Values
ZWL


Experimental Matched Control Random Control
Week

Zvt ZWL Zvt ZWL vt ZWL


1.08
1.70*
1.02
1.77*
-1.35
0.38
1.38
0.89
6.44*
0.57
-0.41
-0.11
-0.23
-0.43
0.51
0.38
1.16


1.08
1.96*
2.20*
2.79*
1.89*
1.88*
2.26*
2.43*
4.43*
4.39*
4.06*
3.85*
3.64*
3.39*
3.41*
3.20*
3.39*


-0.18
-1.05
1.31
0.43
0.14
-0.58
0.13
0.60
1.90*
0.91
0.79
0.73
0.60
-0.26
0.15
0.81
0.57


-0.18
-0.87
-0.05
0.26
0.30
0.03
0.08
0.29
0.69
1.15
0.86
1.03
1.15
1.04
1.05
1.21
1.04


0.31
0.34
0.80
1.82*
-0.11
-0.27
0.35
2.15*
0.36
1.54
-1.55
1.35
-1.11
-0.48
0.22
-0.61
1.57


0.31
0.46
0.84
1.63
1.42
1.18
1.22
1.91*
1.92*
2.30*
1.73*
2.05*
1.66*
1.47
1.48
1.28
1.22


* Significant at the 0.05 level





- 78 -


-5 -4 -3 -2 -1 0 1 2 3 4 5 6 7


Experimental
Match Control -
Random Control *


Figure 4-2
Positive Group
Cumulative Standardized Prediction Error (2: \7)
1.1







- 79 -


for the three portfolios. Results for the experimental portfolio can

be summarized as follows:

1 the null hypothesis of no information content was rejected

for the forecast announcements week and for two other weeks

(t-7 and t-5) at the 0.05 level.

2 the largest positive mean prediction error was associated

with the forecast announcements week.

3 with the exception of the first week, the cumulative

prediction errors were statistically significant at the

0.05 level for the entire test period. The size of the

cumulative prediction errors associated with the

experimental portfolio were considerably larger than those

associated with either of the two control portfolios.

Results for the control portfolios indicate that:

1 the null hypothesis of no information content during the

forecasts disclosure week was rejected at the 0.05 level

for the matched control portfolio but not for the random

control portfolio.

2 the largest positive mean prediction error was associated

with the matched control portfolio during the forecasts

disclosure week.

3 the random control portfolio exhibits statistically

significant positive prediction errors during weeks t-5 and

t-1.






- 80 -


Results of the distribution tests are shown in Table 4-7.

These results indicate that the null hypothesis of no information

content was rejected for both the experimental and the matched control

portfolios during the forecast announcements week but was not rejected

for the random control portfolio. Other weeks in the test period

exhibited slightly lower Z values than those reported for the

standardized predictio errors test.

The Z values for the trimmed standardized prediction errors

test are shown in Table 4-8. Results for each of the three portfolios

are:

1 the null hypothesis of no information content was rejected

for the experimental portfolio during the forecast an-

nouncements week but not for any other week in the test

period.

2 the null hypothesis of no information content could not be

rejected at the 0.05 level for the matched control port-

folio during the entire test period.

3 the null hypothesis of no information content could not be

rejected at the 0.05 level for the random control portfolio

during the entire test period.

The above results suggest that the positive prediction errors

observed for the experimental portfolio during the forecast announce-

ments week represent a general pattern and were not influenced by a

few large outliers. This conclusion is not equally valid for the

matched control portfolio where the observed effect seems to have been

influenced by a few large outliers.





- 81 -


Table 4-7


Total Positive
for Ze and
et


Values
Z
vt


Experimental Matched Control Random Control

Week
Zett t Zvt Zet Zvt


1.04
1.12
1.35
1.26
-1.44
0.14
1.70
0.97
5.73*
0.71
-0.02
0.03
-0.02
-0.24
0.56
-0.19
0.18


1.08
1.55
1.14
1.56
-1.49
0.26
1.38
0.83
5.96*
0.59
-0.44
0.05
-0.18
-0.58
0.50
-0.40
0.98


-0.03
-0.91
0.84
0.01
-0.59
-1.16
0.45
0.26
2.03*
1.07
-0.54
0.16
0.62
-0.48
0.33
0.92
-0.91


-0.09
-1.31
1.05
0.25
-0.21
-0.78
0.13
0.56
1.64*
0.89
-0.79
0.39
0.40
-0.23
0.18
0.84
-0.75


0.41
-0.21
1.20
1.57
-0.08
-0.36
0.92
2.13
0.11
1.39
-1.34
1.27
-0.70
-0.69
0.12
0.16
S1.22


0.45
0.28
0.93
1.60
-0.30
-0.25
0.53
1.88
0.30
1.58
-1.64
1.31
-1.05
-0.44
0.33
-0.42
1.54


* Significant at the 0.05 level


i





- 82 -


Table 4-8

Total Positive Trimmed
Mean Values for Zv
t


Week Experimental Matched Control Random Control


0.40
0.71
0.09
0.00
-1.14
-0.11
1.21
0.92
5.71*
0.41
-0.78
-0.46
0.34
-0.03
-0.17
-0.57
0.74


0.09
1.17
0.72
0.54
0.34
-0.57
0.22
0.75
1.18
0.20
-1.06
0.31
0.17
0.33
0.43
0.82
-0.38


-0.25
0.17
0.56
1.47
-0.77
-0.27
0.00
0.43
-0.25
1.38
1.20
0.93
1.36
0.49
0.65
0.62
1.11


* Significant at the 0.05 level


_ .1 _







- 83 -


Results of the two-way analysis of variance test are reported

in Table 4-9. These results confirm the finding of the prediction

errors tests. The null hypothesis of no difference among the means of

the three portfolios could not be rejected at the 0.05 level. The

null hypothesis of no difference among the eleven information treat-

ment effects was rejected at the 0.0005 level. The largest positive

overall weekly mean return was observed during the forecast announce-

ments week. The null hypothesis of no interaction effect could not be

rejected at a statistically significant level. The Duncan's Multiple

Range Test rejected the null hypothesis that the thirty-three weekly

mean returns are equal at the 0.011 level. The largest positive

weekly mean return was associated with the experimental portfolio

during the forecast announcements week.

In sum, findings of all tests suggest that:

1 management forecasts of earnings which exceed market expec-

tations cause a statistically significant upward stock

price revision for forecasting firms but not for non-

forecasting firms in the same, or similar, industry.

2 the observed effect for the experimental portfolio

represents the general pattern of the samples and is not

influenced by a small number of large outliers.

3 the size of the cumulative prediction errors for the three

portfolios prior to the forecast announcements week

indicates that the management earnings forecasts are not

motivated by industry-wide or economy-wide factors.





- 84 -


Table 4-9

Total Positive Portfolios
Analysis of Variance


Test F-value PR>F


Type of portfolio effect 0.71 0.49



Information treatment effect 3.15 0.0005



Interaction effect 1.01 0.445



Comparison of all means 1.66 0.011






- 85 -


B The Negative Portfolio

Table 4-10 reports the Z statistic for the standardized

prediction errors and the cumulative prediction errors. Figure 4-3

portrays the behavior of cumulative average standardized prediction

errors for the three portfolios. Results for the experimental

portfolio suggest that:

1 the null hypothesis of no information content was rejected

at the 0.05 level for the forecast announcements week and

for four other weeks in the test period. Three of these

four weeks preceded the forecast announcements week.

2 the largest negative weekly mean prediction errors occurred

during the forecast announcements week.

3 with the exception of t-8 and t-1, all weeks preceding the

forecast announcements week exhibited negative prediction

errors. As a consequence, the cumulative prediction error

was negative beginning at t-7 and continuing throughout the

test period.

4 the size of the negative cumulative prediction errors for

the experimental portfolio was considerably larger than

those reported for the two control portfolios.

Results for the two control portfolios suggest that:

1 the null hypothesis of no information content was rejected

for the matched control portfolio during the forecast

announcements week and during t-7. The same null





- 86 -


Table 4-10

Total Negative Values
for Zvt and ZWL
vt WL


Experimental Matched Control Random Control
Week

Zvt ZWL Zvt ZWL vt ZWL


0.56
-1.25
-2.14 *
-2.99 *
-0.33
-0.18
-1.79
0.26
-5.20*
-0.54
-1.04
-0.22
-0.06
-1.90*
1.80
0.41
0.05


0.56
-0.48
-1.63
-2.91*
-2.75*
-2.58*
-3.07*
-2.78*
-4.35*
-4.30*
-4.42*
-4.29*
-4.14*
-4.50*
-3.87*
-3.64*
-3.52*


-0.85
-2.09*
1.07
-0.89
1.12
-0.13
2.79
1.75
-2.82*
-1.59
1.50
-1.20
2.25
2.05
-0.15
-0.38
-0.61


-0.85
-2.16*
-1.15
-1.44
-0.80
-0.78
0.33
0.93
-0.07
-0.57
-0.09
-0.43
0.29
0.83
0.77
0.61
0.48


0.60
0.89
-0.12
0.04
0.47
-0.95
0.60
1.17
-0.12
-0.41
-0.50
-0.01
-0.32
0.43
2.15
0.82
1.24


0.60
1.48
0.79
0.70
0.84
0.42
0.12
0.53
0.43
0.27
0.11
0.11
0.01
0.13
0.68
0.86
0.52


* Significant at the 0.05 level





- 87 -


1.00

0.80

0.60

0.40

0.20

0

-0.20

-0.40

-0.60

-0.80

-1.00

-1.20

-1.40

-1.60

-1.80

-2.00

-2.20

-2.40


Figure 4-3
Negative Group
Cumulative Average Standardized Prediction Errors (2V7 \)
H1I


experimental -
iMach Control -
Random Control ** **






- 88 -


hypothesis could not be rejected during the test period for

the random control portfolio.

2 the largest negative weekly mean prediction errors occurred

for the matched control portfolio during the forecast

announcements week.

The above findings are fully supported by the results of the

distribution tests. Table 4-11 reports the Z statistic for et and vt

during the test period. The trimmed standardized prediction errors

test provides additional support for these findings and suggests that

the observed results are a general pattern of the data and not due to

the influence of a few large outliers. Table 4-12 reports essentially

the same results following the removal of outliers.

With respect to the industry-wide effect, all three tests

reported a significant abnormal return for the industry-matched

control portfolio during the forecast announcements week. These

results suggest that the management earnings forecasts contain infor-

mation relevant to establishing equilibrium prices of non-forecasting

firms in the same, or similar, industry. More importantly, however,

is the observed behaviour of abnormal returns associated with the

three portfolios prior to the forecast announcements week. The

cumulative abnormal returns for the eight weeks preceding the forecast

announcements week were positive for the industry-matched and the

random control portfolios. This suggests that neither industry-wide

factors nor economy-wide factors induced the negative management





- 89 -


Table 4-11

Total Negative Values
for Z eand Zv
et vt


Experimental Matched Control Random Control
Week -I.
Zet Zvt Zet Zvt Zet Zvt


-0.03
-1.19
-2.42*
-3.40*
- .76
0.35
-1.97*
0.08
-3.46*
-0.34
-2.43*
-0.80
-0.10
-1.38
1.55
0.84
-0.29


0.56
-1.38
-2.55*
-3.37*
-0.76
0.29
-2.26*
0.21
-3.71*
-0.19
-2.34*
-0.80
-0.02
- .74
1.34
0.64
-0.16


-1.25
-1.77*
1.68
-1.21
1.12
-0.8
2.21
1.14
-2.55*
-1.99*
0.56
-1.09
2.24
1.72
-0.78
-0.66
-1.40


-0.86
-1.72*
1.29
-1.00
1.19
-0.43
2.64
.94
-2.49*
-1.61
0.76
0.14
1.90
1.69
-0.47
-0.49
-1.46


0.48
0.55
0.44
-0.35
0.32
-1.06
-0.90
1.27
- .22
-0.66
-0.20
-0.27
0.09
0.48
2.77
1.06
0.22


0.42
0.78
0.27
-0.03
0.49
-1.03
-0.80
0.98
0.05
-0.75
-0.43
-0.40
0.01
0.29
2.37
1.03
-0.56


4 4


* Significant at the 0.05 level




- 90 -


Table 4-12

Total Negative
Trimmed Mean
Values for Zvt


Week Experimental Matched Control Random Control


0.66
-1.18
-2.06*
-2.62*
-0.65
0
1.26
0.51
-4.45*
-0.43
-0.78
-0.18
-0.35
-1.30
1.32
0.18
0.30


-0.16
-1.98*
1.00
-1.13
0.83
0.29
1.83
0.66
-2.99*
-1.02
-0.37
-1.19
1.42
0.49
-0.05
-0.05
-0.53


0.63
0.57
1.20
-0.46
0.28
0.97
-0.85
0.53
-0.22
0.43
0.47
-0.04
0.25
0.37
1.51
0.69
1.58


* Significant at the 0.05 level







- 91 -


earnings forecasts. Rather, the disclosure of these forecasts

resulted in a downward revaluation of other firms in the same, or

similar, industry.

The two-way analysis of variance test provides additional

evidence consistent with the results of prediction errors tests.

Results for the analysis of variance test are summarized in Table

4-13. The null hypothesis of no difference among the three portfolios

was rejected at the 0.01 level. The null hypothesis of no difference

among the eleven information treatment effects was rejected at the

0.0002 level. The largest negative weekly mean returns were observed

during the forecast announcements week. The null hypothesis of no

interaction effect could not rejected at a statistically significant

level. The Duncan's Multiple Range Test rejected the null hypothesis

that all thirty-three weakly mean returns are equal at the 0.0002

level. The two largest negative weekly mean returns occurred during

the forecast announcements week for the experimental and the industry

matched control portfolio respectively.

In sum, the positive (negative) news forecasts were accompanied

by significant upward (downward) stock price revisions during the

forecast announcements week. The behavior of the cumulative

prediction error indicated proper anticipation of the earnings fore-

casts content prior to the announcements week. Both classifications

of forecasts induced an industry-wide effect, although the observed

effect for the negative news forecasts was more profound than was the

observed effect for the positive news forecasts.




- 92 -


Table 4-13

Total Negative Portfolios
Analysis of Variance


Test F-Value PR > F


Type of portfolio effect 4.57 0.010


Information treatment effect 2.73 0.002


Interaction effect 1.19 0.254


Comparison of all means 1.88 0.002







- 93 -


The Effect of Imputed Accuracy of Management Earnings Forecasts

The two high-level newness forecasts are classified as either

positive or negative forecasts. Each of these two classifications was

subdivided into two unequal portfolios according to the degree of

imputed accuracy ascribed to these forecasts. The result is four

portfolios; with high and low imputed accuracy for both the positive

and the negative classification. Testing the effect of imputed

accuracy of management earnings forecasts is accomplished by an

individual examination of each of the four portfolios and by a

comparison of the high-level and low-level imputed accuracy portfolios

for each forecast classification. Separate examination of each port-

folio will indicatewhether the information content of management

earnings forecasts is a function of newness alone or the combination

of newness and imputed accuracy of these forecasts. The comparison

between the high and the low level imputed accuracy portfolios for

each classification of forecasts will indicate the extent to which the

information content is dependent upon the level of imputed accuracy

ascribed to forecasts.

Results are reported below for the two positive portfolios

followed by results for the two negative portfolios.



Positive Forecasts-High Imputed Accuracy

Table 4-14 reports the Z statistic for standardized prediction

errors and cumulative prediction errors. Figure 4-4 portrays the




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