2011 apparent audit failures and vaue revance of earnings and book value.pdf
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Apparent audit failuresand value relevance of
earnings and book valueLi Dang
Orfalea College of Business, California Polytechnic State University,San Luis Obispo, California, USA
Kevin F. BrownDepartment of Accountancy, Raj Soin College of Business,
Wright State University, Dayton, Ohio, USA, and
B.D. McCullough
Department of Decision Sciences, LeBow College of Business,Drexel University, Philadelphia, Pennsylvania, USA
Abstract
Purpose The purpose of this paper is to examine the value relevance of accounting information incases of apparent audit failures.
Design/methodology/approach The authors adopt the bootstrapping technique and compare thevalue relevance of key accounting information across samples of firms experiencing apparent auditfailures with matched non-audit failure firms.
Findings Accounting information is found to be less value relevant for firms experiencing apparentaudit failures, regardless of auditor reputation.
Research limitations/implications This study has limitations due to the ex ante research
approach adopted. Future research could address this issue by possibly incorporating an interveningfactor into the model to indicate how the market can differentiate audit failure firms from other firms.
Originality/value The paper gives support to the assertion that the market appears to rely less onaccounting numbers when audit failures occur, even though formal allegations of audit failure may notappear until years after their occurrence. In addition to contributing to value-relevance research byproviding empirical evidence for the market phenomenon around the time of material misstatements,the paper demonstrates an innovative application of bootstrapping to test for differences in R2.
Keywords Auditing, Accounting information, Earnings
Paper type Research paper
I. IntroductionDeAngelo (1981, p. 186) defines audit quality as the market-assessed joint probability
that a given auditor will both (a) discover a breach in the clients accounting system,and (b) report the breach. However, assessment of quality for particular auditengagements remains somewhat murky, due to the nature of the audit process,the reporting of audit outcomes, and users response to the auditors reputation (i.e. a Bigvs non-Big dichotomous audit quality measurement). Previous studies have examinedthe association between audit quality and earnings response coefficients (Teoh andWong, 1993). The empirical results appear to support that the market respondspositively to reputable auditors.
The current issue and full text archive of this journal is available at
www.emeraldinsight.com/1475-7702.htm
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Review of Accounting and Finance
Vol. 10 No. 2, 2011
pp. 134-154
q Emerald Group Publishing Limited
1475-7702
DOI 10.1108/14757701111129616
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However, whether auditor reputation could serve as a reliable proxy for auditquality may be unknown due to the high-profile audit failures which occurred during thedownturn in the financial markets a decade ago. Many notorious firms, for instance,Enron, WorldCom, and Tyco, were audited by Big five auditors with reputations similar
or even superior to those of the non-Big five. Thus, one might conclude that an auditorsreputation may actually hinder the markets ability to assess the reliability of accountinginformation.
The purpose of this paper is to explore whether auditor reputation affects the valuerelevance of accounting information in cases of apparent audit failures. For the purposeof this study, apparent audit failures are defined as instances that an auditor issuesan unqualified opinion on materially misstated financial statements. Since apparentaudit failures indicate poor audit quality, they offer an opportunity to explore theassociation between stock prices and accounting information given low audit quality.Therefore, this study compares ex ante value relevance of accounting information ofpublicly held US firms experiencing apparent audit failures with a matched groupof firms not experiencing such failures.Ex ante value relevance refers to value relevanceof accounting information prior to the discovery of audit failures. Matching auditfailure firms with non-audit failure firms allows audit quality to be evaluated on aservice-by-service basis, consistent with the suggestion of Lam and Chang (1994).
This study differs from previous studies on market reactions to news of auditfailures, accounting scandals, or earnings restatements (Chaney and Philipich, 2002;Dechow etal., 1996; Feroz et al., 1991). Instead of examining stock market reactions to thenews of audit failures, we focus on examining value relevance of accounting informationin the alleged periods of misstatement. Those alleged periods are the reporting periodswhen audited financial statements contain material misstatements. We comparefirms experiencing apparent audit failures with matched firms without audit failures inthe same periods in order to find whether there is a difference in value relevance of
accounting information prior to audit failures becoming public. Therefore, this is anexploratory study that aims to examine market reactions around the time when financialstatements contain misstatements. In addition, we divided our sample into sub-samplesclassified by auditor types (i.e. Big 8/6/5/4 auditors vs non-Big 8/6/5/4 auditors) andconduct the same comparisons to investigate whether such a difference is conditioned onauditor reputation.
Several sources are used to identify apparent audit failures (in these cases, an auditorissues an unqualified opinion on materially misstated financial statements). Thesesources include the US Securities and Exchange Commissions (SECs) Accounting andAuditing Enforcement Releases (AAERs), financial statements restatements because ofpast misstatements, and litigation against auditors due to audit failures.
Consistent with prior research (Collins et al., 1997, 1999; Rees, 1999; Rajgopal et al.,
2002), value relevance is measured by the explanatory power of contemporaneousearnings and book values for stock prices (i.e. the regression of stock price on earningsand book values). We apply a bootstrappinganalysis to test data collected. The results ofthis analysis indicate that the accounting information of firms experiencing apparentaudit failures is generally less value relevant than that of a matched group of firms notexperiencing such failures. Results of sub-sample comparisons further indicate that theaudit reputation may not be essential because the market appears to discount lessreliable accounting information. The remainder of this paper is organized as follows.
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Section II describes prior research pertaining to market perceptions of audit quality.Section III contains the development of the research hypothesis. Section IV discussesdata collection and the research methodology. Section V presents statistical analysis andempirical results. Section VI provides concluding remarks.
II. Prior researchPrevious studies of audit failures have focused on market reactions to theannouncements of earnings restatements, fraud class actions, and SEC enforcementactions (Liu et al., 2009; Akhigbe et al., 2005; Chaney and Philipich, 2002; Dechow et al.,1996; Bhagat et al., 1994; Francis et al., 1994; Kellogg, 1984). Overall, these studieshave documented a negative market reaction to such announcements. For example,Francis et al. (1994) find a negative market response to the corrective disclosure of firmsexperiencing class action litigation. Feroz et al. (1991) document a 10 percent decline instock prices at announcements of accounting violations. Akhigbe et al. (2005) find that
earnings restatements lead to a negative market response and that the negative responseis conditioned on the content of earnings management. Liu et al. (2009) find thatshareholders are more likely to vote against the ratification of the auditor following anaudit failure. In spite of these findings, none of these studies examine market reactionsbefore accounting violations or audit failures became public knowledge.
Chaney and Philipich (2002) examine the reputation effect of the Enron audit failure.Specifically, they investigate the impact of auditor reputation on the market prices ofArthur Andersens clients around the Enron bankruptcy. After Andersens reputationwas damaged, its clients experienced a significant drop in their stock prices. The resultof Chaney and Philipich (2002) appears to indicate that market perception of reliability ofaccounting information is conditioned on market perception of auditor reputation.
Recently, Griffin et al. (2004) investigate the impact of class action litigation of audit
failures on stock returns and earnings-returns relation in the alleged periods. They findthat the market responds positively to releases of misleading accounting information. AsGriffin et al. point out, the primary reason for this result is that the market initially acceptsthe misstated information. Furthermore, the ex postnegative reaction to class action lawsuitannouncement is conditioned on the returns-earnings relation in the alleged periods.
In summary, except for Griffin et al (2004), most previous studies have focused onmarket reactions around news releases of audit failures instead of examining the marketreaction to misstated earnings in the alleged periods. To yield additional insightsfor the literature, the purpose of this study is to explore value relevance of accountinginformation when financial statements contain material misstatements. Specifically, weexamine the contemporaneous association between stock prices and misstatedaccounting information in the periods with alleged misstatement. This study differsfrom other audit failure studies in the following aspects:
. Instead of focusing on ex post market reactions to audit failures, this studyexamines the market perception of the information quality ex ante.
. Instead of using an event study approach, this study examines the associationbetween stock prices and accounting information in a longer window.
. This study also provides evidence on whether market perception of informationquality in the alleged periods is conditioned on auditor reputation.
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III. Development of hypothesisBecause apparent audit failures are less ambiguous, they provide a unique way oftesting the markets perception of accounting information quality ex ante driven by pooraudit quality. Using firms not experiencing apparent audit failures as benchmarks, this
study examines whether the value relevance of accounting information is different forfirms experiencing apparent audit failures from those of benchmarked firms. In thisstudy, value relevance indicates the extent to which accounting information explains thevariation of market prices. When financial statement users perceive higher informationquality, therefore more reliable financial statements, accounting information such asearnings and book values should explain more of the variation in stock prices.
The Ohlson (1995) model is used to test the value relevance of accountinginformation (Amir, 1996; Amir and Lev, 1996; Collins et al., 1997, 1999; Rees,1999; Rajgopal et al., 2002). The Ohlson model relates a firms market value to itscontemporaneous accounting information. Specifically, this model provides a structure tostudy the relationship between equity values and earnings, as well as its relationship withbook values (Stober, 1999). The degree of value relevance is measured by the R2 of the
Ohlson model (Collins et al., 1997; Rees, 1999; Rajgopal et al., 2002). The R2 measuresthe degree of the variation in the dependent variable explained by independent variables.If the perceived information quality (i.e. audit quality) is low, theassociation between stockprice and accounting information, hence the R2 of the Ohlson model, should be weakbecause accounting information will be viewed as less reliable.
Owing to the exploratory nature of this study, we state our hypothesis in its nullform:
H0. There is no difference between the explanatory power of earnings and bookvalues for stock prices of firms experiencing apparent audit failures and firmsnot experiencing apparent audit failures.
IV. Data collection and methodologyCases of apparent audit failures and the matched control groupFirms included in this study are selected from the SECs AAERs and restatementsof financial statements found in the Wall Street Journal Index and Lexis-NexisNews Library for fiscal years ending between 1980 and 2000. The initial sample isthe combination of these two data sources. AAERs indicate firms whose financialstatements containing misstatements documented in the SEC sanctions against firms ortheir auditors. We exclude AAER cases where quarterly misstatements are the focus ofthe sanction because quarterly statements are only reviewed, but not audited,by auditors. Restatements consist of firms that restated prior years financial statementsbecause of significant misstatements. These represent apparent audit failures becauseauditors did not detect and/or report those material misstatements initially. We searched
keywords with the root restat- in Wall Street Journal Index and Lexis-Nexis NewsLibrary. Quarterly restatements are also excluded from our sample. To ensure that thesearch of the above two sources did not omit any audit failures; we also searched, as asecondary source, news accounts of auditor litigation including the auditor litigationdatabase compiled by Palmrose (1999). Cases of litigation against auditors containallegations that auditors failed to detect and report material misstatements. Such casesare included in this analysis due to possible lags in SEC scrutiny which would ordinarilyresult in enforcement activity and/or restatements of prior financial statements.
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Accordingly, litigation cases that provide substantial evidence of audit failure areincluded as apparent audit failures. While lawsuits seeking damages from an auditor arenot always indicative of the auditors failure to adhere to professional standards, suchsuits may reveal audit failures before subsequent issuanceof an AAER. A careful review
of the litigation news accounts helped to ensure that only apparent audit failures arecaptured in the sample.
In order to perform hypothesis testing, all accounting data for the years of the allegedaudit failures that are necessary for testing the proposed relation are extracted from theCOMPUSTAT database. All stock price information is obtained from the Center forResearch in Security Prices (CRSP). The matched control group is selected based onestablished matching criteria. These criteria include the year of financial statements,auditor size (Big 8/6/5/4 vs non-Big 8/6/5/4), client industry, and client size. The requiredaccounting data and price information are compiled for the matched control group fromCOMPUSTAT and CRSP, respectively.
Model specification
The model used to test the hypothesis is Ohlsons (1995) valuation model (Amir, 1996;Amir and Lev, 1996; Collins et al., 1997, 1999). The Ohlson model is expressed as follows:
Pit a1EPSit a2BVPSit 1it 1
where:
Pit closing stock price of firm is equity three months after fiscal yearend t[1];
EPSit firm is reported earnings per share before extraordinary items forperiod t;
BVPSit firm is book value of equity per share at time t;
1it random error term with mean 0 and variance 1; anda1 and a2 the regression coefficients.
Testing of hypothesisTo test the hypothesis, comparisons are made between the apparent audit failure group offirms and the matched control group of firms not experiencing audit failures. For eachcomparison, two OLS regressions of the Ohlson model are performed: one regression forthe audit failure group, and the other for the matched control group. If theR2 for the auditfailure group is statistically significantly lower than theR2 for the matched control group,it suggests that value relevance of accounting information is lower in the alleged periodand that the market appears to rely less on accounting information in the allegedperiod when there are material misstatements. If theR2 for the audit failure group is equalto or higher than the R2 for the matched control group, it suggests that the market maybe fooled in the alleged period. Moreover, we examine whether value relevance ofaccounting information in the alleged period is conditioned on auditor reputation.For example, there might be a greater difference in value relevance of accountinginformation for firms audited by Big 8/6/5/4 auditors than those audited by non-Big8/6/5/4 auditors. Comparisons we use to test the hypothesis are summarized in Table I.
Comparison 1 tests whether there is a difference in value relevance of accountinginformation between the audit failure group and the matched group, in general.
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Comparisons 2 and 3 test whether value relevance differs within Big 8/6/5/4 andnon-Big 8/6/5/4 groups. Comparisons 4 and 5 directly test whether the difference in valuerelevance of accounting information between the audit failure group and the matchedgroup is conditioned on auditor size.
V. Analysis and resultsSample selection and characteristicsWe searched both the SECs online archives and the Lexis-Nexis News Library forAAERs. Between 1982 and 2000, AAERs No. 1 through No. 1357 were released. Thereare 559 unique firms identified from those AAERs[2]. Of these 559 firms, 383 uniquefirms are selected and the remaining 176 firms are deleted because the AAERs:
(1) do not indicate the years misstated;
(2) indicate the misstatement years are before 1980;
(3) pertain to quarterly financial statements; or
(4) indicate that the auditors are not responsible for the misstated financialstatements.
Our search for financial restatements in the Wall Street Journal Index and theLexis-Nexis News Library yields 462 unique firms with restatements. Of those 462 firms,273 unique firms meet the requirements for our analysis. The other 189 firms are deletedfor reasons discussed in (1) through (4) above. We then combine the 383 firms sanctionedin the AAERs with the 273 firms disclosing subsequent restatements and find that42 firms exist in both data sources. Therefore, we identify 614 firms that experiencedapparent audit failures from these two data sources.
Since our analysis requires accounting data from COMPUSTAT, we first searchedfor the ticker identification numbers for those 614 firms by their firm names
in COMPUSTAT. A total of 154 firms were deleted because they do not haveticker identification numbers[3], leaving 460 firms remaining for further analysis.An additional 297 firms that meet our data requirements are found in the auditorlitigation database compiled by Palmrose (1999)[4]. Since 74 of these firms are alreadyincluded in our 460-firm sample, our overall sample increased to 683 unique firms.All these firms have materially misstated annual financial statements within the periodfrom 1980 to 2000, and their COMPUSTAT ticker identification numbers are available.
As this study defines apparent audit failures as cases in which auditors provideunqualified opinions on financial statements that contain material misstatements,a search of the COMPUSTAT database[5] for those firms receiving unqualified opinionswas performed. Of the 683 firms, 442 firms (848 firm/years) have audit opinion
Comparison Failure group (AF) auditors Non-failure group (NAF) auditors
1 Both Big 8/6/5/4 and non-Big 8/6/5/4 auditors
Both Big 8/6/5/4 and non-Big 8/6/5/4 auditors
2 Big 8/6/5/4 auditors Big 8/6/5/4 auditors3 Non-Big 8/6/5/4 auditors Non-Big 8/6/5/4 auditors4 Big 8/6/5/4 auditors Non-Big 8/6/5/4 auditors5 Non-Big 8/6/5/4 auditors Big 8/6/5/4 auditors
Table I.Comparisons used to test
the hypothesis
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information available for the specified financial statement years. An additional 26 firms(69 firm/years) were deleted because auditors issued qualified opinions to those firms.Therefore, 416 firms (779 firm/years) are eligible for inclusion as apparent audit failures.
The sample for this study was reduced further because of the absence of other data
required to test the hypothesis. To test the hypothesis, earnings per share, book value ofstockholders equity, and stock price data must be available from the COMPUSTAT andCRSP databases. Given these considerations, the resulting sample of apparent auditfailures is 346 firms (616 firm/years). Table II reports the sample size and the industrydistribution information of sample firms. Given the matched-pairs design used in thisstudy, each audit failure firm in the sample is matched with a control firm based on year ofmisstated financial statements, industry (SICcode), company size (total assets), and auditortype (Big 8/6/5/4 vs non-Big 8/6/5/4)[6]. To get the matched pairs, we searched for similarsize firms (with total assets within 10 percent) in the same industry (two- to four-digit SICcode) in the alleged years[7]. If there is more than one similar size firm available, we selectthe one with the closest SIC code. If there is no firm of similar size available in the same
industry, we select the firm with the closest total assets. In case there is no matched pairavailable according to our matching criteria, we drop the audit failure observation.
Hypothesis testingPrior accounting research has used a modelsR2 statistic to measure the value relevance ofaccounting information (Lang et al., 2003; Sami and Zhou, 2004; Francis and Schipper, 1999;Nwaeze, 1998; Collins et al., 1997; Amir and Lev, 1996; Harris et al., 1994). These studieshave measured value relevance as theR2 resulting from the regressions of stock prices onper share values of earnings and book values of equity. These studies compare valuerelevance measured by R2 either over different time periods or across different samples.In this study,R-squares are compared across audit failure and non-audit failure groups to
investigate whether there is a difference in value relevance between the group of firmsexperiencing apparent audit failures and a matched group of firms that do not experience
Panel A: sample determination for apparent audit failure casesNumber of firms Number of firm/years
Audit failure cases 416 779Less: observations without price data 70 163Sample for testing 346 616Panel B: industry distribution for apparent audit failure cases
Industry SIC code Number of observations PercentageAgriculture, forestry, fishing 01-09 1 0.29Mining 10-14 15 4.34
Construction 15-17 7 2.02Manufacturing 20-39 127 36.71Transportation and public utilities 40-49 31 8.96Wholesale trade 50-51 12 3.47Retail trade 52-59 38 10.98Finance, insurance, real estate 60-67 28 8.09Services 70-89 82 23.70Public administration 90-99 5 1.45Total 346 100.00
Table II.Sample determinationand industry distribution
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apparent audit failures. Except in Harris et al. (1994), Lang et al. (2003) and Sami and Zhou(2004), value-relevance studies have not included a formal test for the difference of R2.
Harris et al. (1994), Lang et al. (2003) and Sami and Zhou (2004) use the proceduredemonstrated in Cramer (1987) to obtain the mean and the variance of R2. Then, they
conduct a z-test to compare the means of two R2
. A major problem in using the Cramermethod in this context of a z-test is that it depends on the assumption of the normaldistribution ofR2. However, the distribution of R2 is not normal, even asymptotically(Anderson, 2003, p. 155). As an example, Figure 1 shows anR2 distribution given anR2
of 0.9 for a regression model with ten independent variables (sample size 100). Visualinspection of this figure reveals that the distribution ofR2 is not normal. An additionalcomplication is that calculation of the moments of R2, which is required to applyCramers method, is prone to computational difficulties that may produce incorrectresults, even when the requisite formulae seem to be programmed correctly.
Because of the difficulty and possible unreliability of using the Cramer procedure, thisstudy uses the bootstrap method to create tests for the difference inR2. Bootstrapping isa resampling method that requires fewer assumptions than traditional methods.
In general, it also provides more accurate results. For example, the bootstrap methoddoes not require normality of the distribution of the R2 and it can provide a fasterconvergence to the expected value of the parameter of interest.
Since the models cannot be nested to formally testH0:R2a R
2b againstHa:R
2a R
2b,
we employ the usual approach of comparing the confidence interval for R2a and theconfidence interval for R2b. Barr (1969) illustrates that the length of the confidenceintervals for the two-interval test must be constructed with the multiplier:
z0
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffin1 n2
pffiffiffiffiffin1
p
ffiffiffiffiffin2
p z0:975
if the significance level of 0.05 is desired. When the sample sizes of the two samples are
the same, i.e. both have n observations, the multiplier becomes:
z0
ffiffiffiffiffi2n
p
2ffiffiffin
p z0:975 ffiffiffi2
p
2z0:975:
As a result, the percentage of the confidence intervals is 83.4 percent. Therefore,comparing two 95 percent intervals is incorrect ifa 0.05 is required[8].
Figure 1.An example of an
R2 distribution
20
15
10
5
0.86 0.88 0.92 0.94
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Descriptive statistics
Thesample selectionprocedureyields616firm/year observationsof apparent audit failures,
which are matched with a control group in order to test the hypothesis. In the audit failure
group, 502 (114) firm/years were audited by Big 8/6/5/4 auditors (non-Big 8/6/5/4 auditors).
Table III illustrates the observations included in each comparison[9].
Table IV presents descriptive statistics, including the mean, median, and standard
deviation for total assets (TA), stock prices (P), earnings per share (EPS), and book value
of equity per share (BVPS) for both groups in each comparison. Table IV also includes a
comparison of the means of these variables. Since the distributions of these variables
might not be normal, both a two-sample t-test and a nonparametric Wilcoxon test are
conducted. In general, the audit failure group and the matched control group are not
significantly different in total assets, which reflects a successful control for company
size. Because of the matching requirements, the audit failure and non-audit failure
groups exhibit different characteristics in firm size, as shown in comparison 4. As stated
earlier, in cases where there are no companies available in the same industries with
the similar firm sizes as audit failure observations, we select matched pairs with the
closest total assets. Consistent with the tendency of larger firms to have Big 8/6/5/4
auditors, comparison 4 shows that the average company size of the audit failure
group is significantly larger than that of the matched control group. In comparison 5,
the Wilcoxon test results show a significant difference in company size, while the
two-sample t-test does notindicatea significant difference. The control firms also appear
to earn more than the audit failure firms. With the exception of comparison 3, the
matched control groups have a higher EPS than the audit failure group.
Audit failure group Matched control group
Comparison 1Number of observations 616 616Big 8/6/5/4 502 502Non-Big 8/6/5/4 114 114Comparison 2Number of observations 502 502Big 8/6/5/4 502 502Non-Big 8/6/5/4 0 0Comparison 3Number of observations 114 114Big 8/6/5/4 0 0
Non-Big 8/6/5/4 114 114Comparison 4Number of observations 463 463Big 8/6/5/4 463 0Non-Big 8/6/5/4 0 463Comparison 5Number of observations 114 114Big 8/6/5/4 0 114Non-Big 8/6/5/4 114 0
Table III.Number of firm/yearobservations in eachcomparison
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Hypothesis testing using bootstrap confidence intervalsFor the purpose of the current study, 1,000 bootstrap resamples were created by
sampling with replacement from each of the original samples. Each bootstrap resample
is the same size as the original sample[10]. For each bootstrap resample, there is oneR2
generated from the bootstrap regression, which is called R2 *. Therefore, the 1,000
bootstrap resamples generated 1,000 R2 *s[11].To test whetherR2 of the audit failure group andthe matched control group differ, we
compare the 83.4 percent bootstrap percentile confidence intervals of R2. Figures 2-6
show the histograms about the distribution of R2
based on bootstrap resamples. Thehistograms ofR2 *s sometimes indicate approximate normality, but other times show anapproximately normal central region with non-normality in the tail region. More
importantly, there are three cases where even the central region is obviously non-normal.
Of these three, two cases are the distributions ofR2 for the audit failure groups auditedby non-Big 8/6/5/4 auditors in comparisons 3 and 5, which exhibit an asymmetric
pattern because most R2 from the bootstrap resamples are very close to zero. The thirdcase appears in comparison 5, where R2 for the matched control group audited by Big
Auditor failure group Matched control group Compare meansa
Mean Median SD Mean Median SD t-test Wilcoxon test
Comparison 1
TA 2,421.1010 135.5100 8,309.7470 1,860.2880 114.5100 6,508.7950 0.1875 0.332P 17.4288 12.2500 17.7024 18.3725 12.0630 22.4992 0.4135 0.9602EPS 20.0065 0.3450 7.0179 0.7458 0.5000 5.7049 0.0392 0.0022BVPS 7.6564 12.2500 9.7234 8.6550 5.7230 16.2675 0.1913 0.2421Comparison 2TA 2,958.4940 224.6000 9,121.2050 2,243.6640 182.2900 7,122.9120 0.1667 0.2256P 19.4984 14.7500 17.9248 21.2554 15.2500 23.8012 0.1867 0.5052EPS 0.01631 0.4900 7.7616 0.9306 0.7850 6.2850 0.0405 0.0007BVPS 8.7918 6.2610 10.2356 9.9054 6.9360 17.6025 0.2208 0.3822Comparison 3TA 54.6836 16.7150 138.4634 172.0858 15.0150 1,447.4700 0.3904 0.9080P 8.3157 4.0000 13.3492 5.6772 3.4380 6.6272 0.0605 0.2113EPS 20.1072 20.0100 0.9703 20.0679 0.0200 1.0853 0.7734 0.8574
BVPS 3.1489 1.1916 4.3721 2.6570 1.7497 5.3825 0.4496 0.0890Comparison 4TA 3,008.3940 211.5500 9,391.1080 1,393.2470 64.5000 9,913.3340 0.0111 0.0000P 19.6246 14.5000 18.3666 15.1947 8.8750 22.0622 0.0009 0.0000EPS 20.0472 0.4700 8.0709 0.5576 0.3700 1.6394 0.1147 0.9536BVPS 8.5995 6.1680 10.4589 7.8357 4.9530 13.6130 0.3386 0.0002Comparison 5TA 54.6836 16.7150 138.4634 46.9001 23.3100 70.6154 0.5932 0.0426P 8.3157 4.0000 13.3492 10.3906 6.7500 14.9525 0.2691 0.0038EPS 20.1072 20.0100 0.9703 0.1656 0.0900 1.3441 0.0796 0.0309BVPS 3.1489 1.1916 4.3721 4.7300 3.3794 5.4881 0.0018 0.0000
Notes: Allp-values less than or equalto 0.05 are shown in italics; abothp-values of the two-sample t-testandthe nonparametric two-sample Wilcoxon test are given; TA, total asset at the end of the fiscal year t;
P, stock price, three month after the end of the fiscal year t; EPS, earnings per share excludingextraordinary items for fiscal year t; BVPS, book value of equity per share at the end of the fiscal year t
Table IV.Descriptive statistics for
observations included inhypothesis testing
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8/6/5/4 auditors appear to have a bimodal distribution, a probability distribution
characterized by two humps rather than the more common single hump thatcharacterizes the normal distribution. One hump is near 0.15 and the other is near 0.46.Since we run bootstrap regressions by resampling the residuals from the originalregression, the bimodal distribution of R2 appears to be driven by an outlier in theresiduals. Examining the regression output, we find one residual with an extreme value.The bimodality exists when a highly influential point is included in some bootstrapresamples but not in others. When we delete this outlier, the bimodal distribution ofR2
disappears. The histogram ofR2 after removing the outlier is shown in Figure 6.
Figure 2.Histograms forcomparison 1
15
10
5
0
0.10 0.15 0.20 0.25
R2 star
R2 star
Notes:R2 *: audit failure group both Big 8/6/5/4 and non-
Big 8/6/5/4; R2 *: matched control group both Big 8/6/5/4
and non-Big 8/6/5/4
Density
15
10
5
0
Density
0.20 0.25 0.30 0.35 0.40 0.45 0.50
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As stated earlier, one advantage of bootstrap methods is that they do not requiredistributions to be normal. Hence, the above descriptions of a non-normal pattern are nottroublesome. To create 83.4 percent bootstrap percentileconfidence intervals,the 1,000R2*sfrom bootstrap regressions were sorted in an ascending order. The lower value of the
confidence interval is the 83rd (0.083*1,000) R2 * and the upper value is the 917th(0.917*1,000)R
2 *. The results of the bootstrap percentile confidence intervals are shown inTable V. Comparisons of bootstrap percentile confidence intervals indicate that there aresignificant differences inR2 for theaudit failure groupsand the matched control groups[12].
Hypothesis testing using the Cramer procedureTo be consistent with prior literature (Harris et al., 1994; Lang et al., 2003; Sami and Zhou,2004), we perform the test using the Cramer procedure. Cramer (1987)providesa procedure
Figure 3.Histograms comparison 2
15
10
5
0
0.10 0.15 0.20 0.25 0.30
R2 star
Density
15
10
5
0
Density
0.25 0.30 0.35 0.40 0.45 0.50 0.55
R2 star
Notes:R2 *: audit failure group Big 8/6/5/4; R2 *: matched
control failure group Big 8/6/5/4
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to calculate the first moment and second moment of R
2
. Once we have the mean andvariance ofR2, we can calculate thez-statistic as in Harrisetal. (1994) and Lang etal. (2003)and compare means ofR2 across two samples. The expression of az-test can be modifiedas follows since the number of observations of R2 is only one for each sample:
z E R21
2E R22
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiV R21
V R22
r
Figure 4.Histograms comparison 3
30
25
20
15
15
10
5
0
0.1 0.2 0.3 0.4 0.5 0.6
10
5
0
0.0 0.1 0.2 0.3 0.4
Density
D
ensity
R2 star
R2 star
Notes:R2 *: audit failure group non-Big 8/6/5/4; R2 *: matched
control group non-Big 8/6/5/4
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The results using the Cramer procedure andz-test are presentedin Table VI. These resultsare similar to those reported by employing the bootstrap method. Therefore, our resultsare robust[13]. As discussed in McCullough and Vinod (1993), caution should be givenwhen using the Cramer procedure to calculate the mean and standard deviation of theR2.For instance, we encountered computer operation overflows, resulting in incorrectoutputs, before we modified our programming to resolve such problems.
Figure 5.Histograms comparison 4
15
10
5
0
0.10
0.2 0.3 0.4 0.5 0.6
0.15 0.20 0.25 0.30
Density
15
10
5
0
D
ensity
R2 star
R2 star
Notes:R2 *: audit failure group Big 8/6/5/4; R2 *: matched
control group non-Big 8/6/5/4
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Sensitivity analysisTo ensure that our analyses are not affected by potentially confounding factors suchas negative earnings or financial distress, we perform several additional analyses.First, as shown in the descriptive statistics, the audit failure group on average exhibits alower EPS compared with the matched control group. The frequency of losses in theaudit failure group is higher compared with the matched control group. Prior literature(Collins et al., 1999; Burgstahler and Dichev, 1997; Hayn, 1995) has suggested that lossesare less informative for prices than profits. Therefore, the relation between stock
price and earnings and book values of firms in financial distress may be fundamentallydifferent from non-distressed firms. To ensure that our results are not driven bythe relatively higher frequency of losses or a greater degree of financial distress amongthe firms in the audit failure group, we carry out two additional analyses. First,we performed a second matching of non-audit failure firms to the audit failure group,adding two additional matching criteria, return on assets (ROA) and leverage, to controlfor the influence of financial distress. We also analyze the data after removing all theseobservations with negative EPS and their pairs in the matched control group.
Figure 6.Histograms comparison 5
30
25
20
15
10
5
0
0.0 0.1 0.2 0.3 0.4
Density
R2 star
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0
Density
0.0 0.1 0.2 0.3 0.4 0.5 0.6
R2 star
15
10
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0
Density
0.1 0.2 0.3 0.4 0.5 0.6
R2 starNotes:R2 *: audit failure group non-Big 8/6/5/4; R2 *: matched control group Big 8/6/5/4; R2 *:
matched control group Big 8/6/5/4; after removing the outlier
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Also, in our original analyses, we include material misstatements that received both
unqualified opinion and unqualified opinion with explanatory language as audit
failure cases. Some of the explanatory language cases refer to an auditors substantial
doubts about a firms ability to continue as a going concern. Although the going
concern opinions are included in the audit failure group, insofar as the auditors opinion
on the fairness of the firms financial statements is not qualified, it is possible that
firms that receive going concern opinions are fundamentally different from the rest of
the firms in the sample. While we already control for financial distress factor by adding
ROA and financial leverage as two additional matching criteria, we perform additional
analyses after removingall firms with going concern opinions and their matched pairs in
the control group, in order to exclude the possibility that our results are driven by some
other confounding factor associated with the going concern opinion.
Additionally, we find that a few audit failure firms changed their auditors during the
period their financial statements were misstated. It is possible that these firms might be
different from other firms because they might be priced differently due to the change in
auditors. Previous research (Teoh, 1992) has documented that auditor changes might
affect stock prices and therefore the association between stock prices and accountinginformation. Schwartz and Menon (1985) examine the motivations for auditor switching
and consider financial distress as a factor that affects auditor switching. Also, there are
other factors, such as audit opinion qualification (Chow and Rice, 1982) that might
trigger auditor switching. Therefore, in addition to controlling for financial distress, we
also analyze the data without those firms that changed auditors during their
misstatement years. The results of all these additional analyses are consistent with our
original analyses, which support our hypothesis[14].
Comparison Failure group Non-failure group
1 Auditor Both Big and non-Big 8/6/5/4
Both Big and non-Big 8/6/5/4
83 percent bootstrap percentileCI
(0.1344, 0.2234) (0.3555, 0.4825)
2 Auditor Big 8/6/5/4 Big 8/6/5/483 percent bootstrap percentileCI
(0.1175, 0.2072) (0.3520, 0.4877)
3 Auditor Non-Big 8/6/5/4 Non-Big 8/6/5/483 percent bootstrap percentileCI
(0.0068, 0.1161) (0.2640, 0.5030)
4 Auditor Big 8/6/5/4 Non-Big 8/6/5/483 percent bootstrap percentileCI
(0.1229, 0.2207) (0.3965, 0.6054)
5 Auditor Non-Big 8/6/5/4 Big 8/6/5/483 percent bootstrap percentile
CI
(0.0068, 0.1161) (0.2045, 0.3894)
Notes: All p-values less than or equal to 0.05 are shown in italics; regression model: Pit a1EPSita2BVPSit
Table V.
Comparisons of bootstrappercentile confidence
intervals for R2
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VI. Limitations and conclusionsLimitationsThis study has limitations due to theex ante research approach adopted. Because of thisexante approach, our matching criteria have to rely on the noisy accounting measure, totalassets, in the alleged years. Therefore, the matching might not be effective in controllingfor size. Although our primary objective is to explore the market phenomenon aroundthe time of material misstatements, exploring why the market discounted accountinginformation reported by audit failure firms even the news of these misstatements is also
Comparison Failure group Non-failure group
1 Auditor Both Big and non-Big 8/6/5/4 Both Big and non-Big 8/6/5/4n 616 616
R2 0.1714 0.4179Mean (R2) 0.1735 0.4190SD (R2) 0.0264 0.0270
z-statistic 6.49772a
Auditor Big 8/6/5/4 Big 8/6/5/4n 502 502
R2 0.1555 0.4129Mean (R2) 0.1582 0.4142SD (R2) 0.0286 0.0210
z-statistic 6.18263b Auditor Non-Big 8/6/5/4 Non-Big 8/6/5/4
n 114 114R2 0.0266 0.3555
Mean (R
2
) 0.0353 0.3624SD (R2) 0.0369 0.0651z-statistic 4.3668
4a
Auditor Big 8/6/5/4 Non-Big 8/6/5/4n 463 463
R2 0.1628 0.4827Mean (R2) 0.1656 0.4839SD (R2) 0.0301 0.0291
z-statistic 7.60155b Auditor Non-Big 8/6/5/4 Big 8/6/5/4
n 113c 113c
R2 0.0284 0.2862Mean (R2) 0.0381 0.2946SD (R2) 0.0369 0.0663
z-statistic 3.3805
Notes: All p-values less than or equal to 0.05 shown in italics; regression model:Pit a1EPSit a2BVPSit;
ain comparisons 2 and 4, audit failure group is the same group except
the number of observations differs; failure group in both comparisons represents firms audited by Bigauditors; in comparison 4, we dropped some failure group firms since we cannot find the matched pairsaudited by non-Big auditors;
bin comparisons 3 and 5, audit failure group is the same group since it
represents audit failure firms audited by non-Big auditors;cthe number of observations is due to
deleting an outlier existing in the matched control group and its pair in the audit failure group; similarto the bootstrap testing results, z-statistic is not significant before deleting the outlier because the largemagnitude of the variance of the R2 for the matched control group, 0.1939
Table VI.Comparison ofR2
using a z-test basedon the Cramer procedure
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an important question. Future research could address this issue by possibly incorporatingan intervening factor into the model to indicate how the market can differentiate auditfailure firms from other firms. Finally, our analysis is based on the pre-Sarbanes-OxleyAct (SOX) period and therefore caution must be exercised when generalizing the findings
of this study to the post-SOX period.
ConclusionsIn this study, we examine whether there is a difference in value relevance of accountinginformation between firms experiencing apparent audit failures and firms that have notexperienced apparent audit failures. The bootstrap method is used to test for differencesinR2 across samples. The results suggest that the value relevance of earnings and bookvalues of equity is lower for firms experiencing apparent audit failures than those forfirms that have not experienced apparent audit failures. Although the market mayexhibit a lower level of confidence in accounting information from firms audited bynon-Big 8/6/5/4 auditors, the results provide evidence that the market generally exhibits
lower confidence in firms experiencing audit failure, regardless of their auditors size.These empirical results show that the explanatory power of accounting informationof firms experiencing apparent auditor failures is lower than that of firms that have notexperienced apparent auditor failures.
In our view, the market appears to rely less on accounting information reported byfirms experiencing apparent audit failures regardless of auditor size, even though anapparent audit failure may not be confirmed by future actions and events until well afterits occurrence. Moreover, in comparison 4, accounting information provided by firmsexperiencing audit failures and audited by Big 8/6/5/4 auditors is less value relevantcompared with firms audited by non-Big 8/6/5/4 auditors that have not experiencedaudit failures. This result suggests the difference in value relevance between theaudit failure group and the matched groups is not conditioned on auditor size. Thus,
as illustrated in comparisons 1 through 5, the results indicate that there is a difference invalue relevance between the audit failure and the matched group ex ante.
In addition to providing evidence suggesting that auditor size does not impact thevalue relevance of accounting information in a dysfunctional manner, this studydemonstrates an innovative application of bootstrapping to test for differences in R2 inthe context of value-relevance research. We believe this method may allow researchersto make more precise conclusions when conducting future value-relevance studies.
Notes
1. According to SEC requirements, before September 2002, Form 10-K had to be filed within90 days after the end of the companys fiscal year.
2. Several AAERs do not identify firm names. Further, some firms received multiple AAERsanctions. There are also some cases where the alleged impropriety involves a governmentalentity.
3. Having ticker identification numbers does not necessarily mean that these firms have allrequired data for specific years in question available in COMPUSTAT.
4. Palmroses (1999) database provides tickers for those companies that have tickeridentification numbers in COMPUSTAT. We exclude those cases of apparent audit failurewhich do not have tickers in the Palmrose (1999) database.
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5. COMPUSTAT data item no. 149 provides both auditor and audit opinion information.However, it does not provide reasons why the qualified audit opinions were issued. Weinclude auditor opinions with a value 1 (unqualified opinion) and 4 (unqualified opinion withexplanatory language).
6. The matched-pairs control group also excludes firms with qualified audit opinions.
7. By selecting matched pairs according to such criteria, we control for confounding factorssuch as size, industry, and time period. Since total assets reported by audit failure firms inthe alleged years could be noisy, control for size might not be very effective. However, we donot expect that any discrepancy in matching would cause significant problems given thatsize is matched within a ^10 percent range.
8. For example, if the sample size for two samples are both 300, the multiplier for the confidenceinterval is:
z0
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi2 300
p
2ffiffiffiffiffiffiffi300
p z0:975 ffiffiffi2
pffiffiffiffiffiffiffi300
p
2ffiffiffiffiffiffiffi300
p z0:975 ffiffiffi2
p
2z0:975 0:834:
9. Note that in comparison 4 in Table II, 39 of the 502 audit failure cases are dropped due toinability to match these firm/years with those of a non-Big 8/6/5/4 control group.
10. For example, for the original sample size of 616 firm/years, the bootstrap resamples also willcontain 616 observations, but will not be identical to the set of observations in the originalsample.
11. See McCullough and Vinod (1993) for details on implementing the bootstrap procedure.
12. In comparison 5, the result is not significant before the outlier is removed. The confidenceinterval (0.0822, 0.5369) is wide when the outlier is included in the sample because of thebimodal distribution of R2.
13. If the results are different using these two methods, the bootstrap method should be morereliable since the z-test requires normality of the R2 and the distribution ofR2 is not exactly
normal.
14. As a result of the more strict matching criteria, the sample size decreased in the secondmatch. We deleted 195, 128, and 61 firm/years with negative EPS, with explanatorylanguage and multiple auditors during the misstatement years, respectively. Results fromthese additional analyses are not tabulated.
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About the authorsLi Dang is an Associated Professor at California Polytechnic State University-San Luis Obispo.Her research interests and publications focus on audit quality, international accounting, andaccounting information systems. She teaches financial accounting and accounting informationsystems courses. Li Dang is thecorresponding authorand can be contacted at: [email protected]
Kevin F. Brown is an Associate Professor in the Department of Accountancy of the Raj SoinCollege of Business at Wright State University in Dayton, Ohio. He has published his research inseveral scholarly and professional journals, including Issues in Accounting Education, Journal of
Accounting Education, and The CPA Journal. He has presented his research at numerous nationalconferences, including Annual Meetings of the American Accounting Association. His primaryarea of research is in auditing and his teaching areas include auditing and financial accounting.
B.D. McCullough is a Professor of Decision Sciences at Drexel University. Before he joined thefaculty at Drexel University, he was an Assistant Professor of Economics at Fordham Universityfrom 1989 to 1994 and a Senior Economist at the Federal Communications Commission from1995 to 2000. He is the Associate Editor for five journals and has authored or co-authored morethan 50 scholarly publications.
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