نشریه قضاوت و تصمیم گیری در حسابداری
پیاپی 10 (تابستان 1403)

The current research has been done with the aim of modeling the dependence of stock price carsh with emphasis on the conditional Copula-Garch function and its relationship with price bubbles based on the rational stock pricing structure in the Iranian capital market. In order to investigate and analyze the research questions, the data related to 30 companies admitted to the Tehran Stock Exchange for the period of 2010 to 2021 were extracted and used to test the research questions. In this research, first, the variable of price bubbles was estimated and extracted by estimating of the capital assets pricing models.Then, in order to model the correlation structure and stock return fluctuations of the sample companies, the multivariate GARCH model of dynamic conditional correlation approach with copula distribution was used. In the following, using the modeling output, the value at risk was calculated as a criterion for assessing the fall in stock prices. The results of the research showed that there is no significant relationship between stock price falls and bubbles based on the rational stock pricing structure. In other words, in the environmental conditions of our country, the condition of falling stock prices in line with the formed price bubbles is not based on rational stock pricing.

Management forecasts are disclosures made by companies to communicate information about their future performance to shareholders. These disclosures are voluntary and are intended to reduce information asymmetry between management and shareholders. Incorrect forecasts can be very costly for managers and question the credibility of managers and show managerial incompetence. The quality of the internal audit function reduces the likelihood of erroneous, biased, or incomplete information in management reports, which managers use to improve their earnings forecasts. Therefore, in the present study, the effect of internal audit function quality on management earnings forecasts accuracy was experimentally tested. To test the research hypothesis, the financial data of the firms listed in Tehran Stocks Exchange during the time period 2018-2022 was used, so that after applying the restrictions in this research, the final sample consisting of 136 firms was selected. After measuring the research variables, multivariate regression analysis based on panel data estimation was used to test the research hypothesis, and the results of the statistical tests showed that there is a positive and significant relationship between internal audit function quality and management earnings forecasts accuracy.

Working capital management refers to the management of current assets and liabilities and is used to create a balance between them so that shareholders can get the maximum return for investing in assets by effectively managing working capital. The efficient management of the working capital of companies is very important for the continued survival and life of the company and shows how to use short-term capital and is also used to measure the company's liquidity. The purpose of this study is to investigate the effect of sustainability performance on working capital management of companies. The current research is applied and from the methodological point of view, the correlation is causal type (post-event). The statistical population of the research is all the companies admitted to the Tehran Stock Exchange, and using the systematic elimination sampling method, 133 companies were selected as the research sample and were examined in a 10-year period between 2012 and 2021. The results of the research hypothesis test showed that sustainability performance has an adverse effect on the liquidity conversion cycle, the average debt collection periodand the average debt payment period of companies. In factby increasing the company's activity in line withcorporate sustainabilitythe company's liquidity conversion cycle will be shorter and faster, and the company will achieve its initial capital, and on the other hand, the period of collecting claims from those with whom it has worked on credit will be reduced and the period of debt payment will be reduced. It will be reduced to others.

Today, the feelings of investors are recognized as one of the influential factors in the flow of capital as well as the general movement of the stock market; So that the flow of capital to investment funds is mentioned as one of the indicators for assessing market sentiment. In fact, investors with little information are more likely to make new investments or withdraw from previous ones based on emotions. The aim of this study was to provide a causal model to investigate the emotional behavior of investors with respect to the fuzzy Dematel method. This research is descriptive in nature and content. In this research, information about 15 professors and capital market experts is the statistical sample. The results of this study showed that the four main factors of behavioral finance, behavioral personality, mass behavior and culture affect the emotional behavior of investors. Also, Dematel method showed that the mass behavior factor with an average of 18.740, the culture factor with an average of 9.497 and the behavioral financial factor with an average of 8.742 are among the influential factors. On the other hand, the behavioral personality factor with an average of 14.975 is considered as an influential factor.

Accounting information is provided to users in the form of financial reports. Independent auditors provide the basis and necessary conditions for the quality of accounting information and financial reporting on time. Therefore, the delay in providing audit reports can affect the company's performance and even the company's stock price. In this research, the theory related to the matching principle in relation to stock price fluctuations was investigated. The main approach of the mentioned theory is that weak matching acts as a disturbance in the economic relationship between income and cost, and as a result, it increases the volatility in stock prices. The results of this research showed a strong compatibility with the existing theory. This research aims to explain the mediating role of the factors affecting the delay in the auditor's report on the relationship between income-cost matching and additional stock price fluctuations using the combined DEMATEL and ANP methods in the period from 1393 to 1399 in 150 companies admitted to the stock exchange. Bahadar Tehran has been done. In order to identify and rank the factors affecting the delay of the auditor's report, the Delphi-fuzzy method was used, and to determine the intensity of etherability and effectiveness, and finally, the fuzzy Dimetal method and the ANP network analysis method were used. The results of the research showed that the delay in the auditor's report plays a mediating role in the relationship between compliance with the principle of compliance and additional fluctuations in price.

Because the separation between ownership and control creates an agency conflict between owners and managers of the firm, strong corporate governance systems are expected to align the interests of the parties involved, whereby firms are more likely to improve their financial performance. The statistical sample includes 148 companies admitted to the Tehran Stock Exchange during the years 1392 to 1400, this study, it has been explained with two hypotheses that have been tested using the econometric technique of generalized moments (GMM) in Evivse software. The findings of the study showed that the quality of corporate governance has a positive and significant effect on both measures of financial performance, and conflict of representation has a negative and significant effect on both measures of financial performance of companies. It was also found that in companies with a high level of conflict of representation, the quality of corporate governance has a stronger effect on both measures of financial performance of companies. The findings of the study showed that the quality of corporate governance has a positive and significant effect on both measures of financial performance, and conflict of representation has a negative and significant effect on both measures of financial performance of companies. This is evidenced by the fact that firms with high levels of agency conflict and high-quality corporate governance mechanisms outperform other firms. Because the results show that the level of agency conflicts strengthens the relationship between the level of corporate governance mechanisms and financial performance.

Professional judgment and decision-making are key skills in auditing processes, and the auditor's ability to make high-quality decisions and judgments is under their personality traits. Auditor's self-efficacy is a kind of internal recognition of individual capabilities and characteristics that causes a better understanding of the job and improves the auditor's expert opinions. Therefore, the present study proposed and tested the effect of self-efficacy as factor affecting auditors' judgment and decision-making. This research is an applied research in terms of purpose and descriptive-survey in nature. Data collection in this research was done through a questionnaire made by the researcher among the members of the public accountants community of Iran using random sampling and 132 questionnaires were analyzed. Content validity was confirmed using the opinions of experts and university professors, and diagnostic validity was confirmed using the Fornell and Larcker index. After the initial implementation of the reliability test with Cronbach's alpha, the relationships between variables and factors have been investigated and confirmed through confirmatory factor analysis and path analysis. Smart PLS statistical software was used to test the hypotheses. The findings showed that the auditor's self-efficacy has a positive and significant effect on the auditor's judgment and decision-making. Auditors who have more self-efficacy make more effort to judge and make professional decisions. The size of the audit firm does not have a significant moderating role on the relationship between self-efficacy and auditor's judgment and decision-making.