فصلنامه بررسی های حسابداری و حسابرسی
پیاپی 69 (پاییز 1391)

In this paper، the effects of disclosure quality on the current and future performance are investigated. In this regard، the effects of firm size and financial leverage are controlled. For measuring the disclosure quality، the scores that assigned to each firms by Securities and Exchange Organization is used. Also، for measuring performance، accounting measures (return on assets and return on equity ratio) and market measures (market value to book value and Tobin''s Q ratio)، are used. The findings of investigating 110 firms in the 1383 to 1388 show that there is a direct and significant relationship between disclosure quality with current and future performance of the Companies Listed in Tehran Stock Exchange. Furthermore، in all hypotheses، the relationship between size and financial leverage as control variables with performance measures was significant

The aim of this study is to investigate the effect of Agency costs and Financial Reporting Quality on the investment risk in companies listed on the Stock Exchange of Tehran. In this study data from 120 firms in Tehran Stock Exchange for the period between the years 1383 to 1389 were examined. Regression model that used in this research is panel data method with fixed effects approach. The results showed that agency costs have significant positive effect on investment risk and Financial Reporting Quality has significant negative effect on the investment risk of firm.

This study Assessment of the quantitative and nature of social and environmental Information disclosure for the Listed Companies in the Tehran Security exchange. To measure and compare the quantity on the nature of corporate social and environmental disclosure (SED)، content analysis was employed. This study measures the level of SED With numbers of sentence. Our study sample included 66 listed Companies in the Tehran Security exchange (TSE) during 1385 to 1389. for analysis of research findings، both descriptive and inferential statistics have been used. The results of the study shows that firms in Iran prefer to disclosure social and environmental information in directors reports in from of narrative information. The dominant area of SED is human resources and the next area is products and service contribution. we also find that firms to be more inclined to disclosure neutral news that good news rather than bad news.

Under the assumption that audit quality is directly related to financial reporting quality، this study examines how audit firm tenure affects audit quality and by its implication، it is associated with the predictability of accounting earnings using management earnings forecasts. Using a sample of firms listed on the Tehran Stock Exchange، our results show that in the early years of audit firm tenure، the accuracy (errors) of earnings forecasts are high (low) and low (high) in the later years of tenure. These results are consistent with the “auditor expertise” hypothesis which predicts higher audit quality in the early years of auditor tenure and the “auditor independence” hypothesis predicting lower quality audits with extended tenure. Overall، our results provide some support for the policy of audit firm rotation.

Random Walk Hypothesis and Stock market efficiency have been examined by researchers for years and different methods have been used to test these hypotheses but little attention has been paid to the variance ratio tests. Accordingly، in this study، the hypothesis is tested with the single Lo & Mackinlay variance ratio test (LOMAC)، the multiple variance ratio test of Chow and Denning (CD)، Richardson-Smith، Belaire-Franch & Contreras and Bootstrapping Kim. We employed four indices including TEPIX، Financial، Industry and TEDPIX for the period of 2007 to 2011 and the results indicated that the random walk hypothesis is rejected. Furthermore، there exists mean reversion in TEDPIX index.

This paper investigates the role of financial reporting conservatism in reducing stock price crash risk using a sample of Iranian firms over the period of 2005-2010. We used khun and watts (2009) CSCORE to measure accounting conservatism، and Kim and Zhang (2010) CRASAH criterion to measure stock price crashes. The result of testing the first hypothesis implies that conservatism reduces stock price crash risk. However، no significant difference was observed for firms with higher information asymetries. The results are consistent with prior researches on the first hypothesis and inconsistent with the second hypothesis.

In this study the results of traditional versus Activity Based Costing (ABC) systems are investigated in electronic services of Iranian Agriculture Bank. To achieve the objectives، several methods and techniques are implemented. To calculate the cost per transaction based on the traditional method، archival studies are employed. To calculate the cost per transaction using ABC time and work studies is done، specifically to allocate the labor costs (as the major cost in the bank). Data Envelopment Analysis (DEA) is implemented to allocate overhead and supporting costs. Several statistical methods are also used to test the research hypotheses. To compare the result of the traditional versus ABC Compare Mean t statistics. To evaluate the usefulness of the two methods based on the information collected from the bank managers (including 88 managers) using the questionnaire، ANOVA technique and factor analysis is implemented. The results showed that there is a significant difference between the two traditional and ABC systems. The findings observed that the mangers prefer the ABC information comparison with the traditional information. These results are examined in three key managerial decision making levels (budgeting، financial decision making and the strategic decision making) and similar results were found.