نشریه نظریه های نوین حسابداری
سال پنجم شماره 1 (پیاپی 15، بهار 1394)

The aim of the present research is to study the effect of ethical behavior of the board of the directors on audit performance quality. The studies indicate that the ethical behavior of the board of the directors will have a positive effect on improving the audit performance quality. Two measures of audit quality are to select a big audit firm and market share of auditor. The present research is an applied research and from aim point of view; is a descriptive study. The statistical population of the present research includes all the firms listed on Tehran Stock Exchange in the time period of 2010 - 2012 and the sample size has been determined with the use of filtering method which is obtained to be equal to 105 firms after the elimination of irrelevant observations.
The findings obtained from data analysis at 95% confidence level indicate that there is a direct and significant relationship between ethical values of the board of the directors and the selection of the Audit Organization as the audit firm in Tehran Stock Exchange. However, the results indicate no significant relationship between ethical values of the board of the directors and the market share of the auditor.

The purpose of this study is investigate the relation between Information asymmetry and level of cash holding of listed companies in Tehran Stock Exchange. To do so, the financial information of 74 companies listed in Tehran Stock Exchange from 1388 to 1392 was investigated. Multiple regression with panel data with fixed effects was used to analyze the relation between Information asymmetry and level of cash holding. The results show that there is no significant relationship between Information asymmetry and level of cash holding. Other results indicate that, Sales growth, firm size, cash flow and Taxes has positive effect on level of cash holding and net working capital has negative effect on level of cash holding.

This study is an attempt to investigate the effect of intellectual capital on firm value and also aims to examine the influence of corporate governance mechanisms including ratio of outside directors, ratio of institutional shareholders, board size and manager concurrently director on value creation resulting from intellectual capital. Value added intellectual capital coefficient model has been used as the top model for measuring intellectual capital. In fact, the purpose of study is to investigate the effect of corporate governance mechanisms on the relationship between intellectual capital and firm value 129 companies have been studied from 2006 to 2013 and multi-regression using panel data was applied to examine the hypotheses. Results indicate that intellectual capital has a significant effect on firm value, but neither of the mechanisms of corporate governance has a significant effect on the value creation resulting from intellectual capital.

The main objective of the present study is to investigate the relationship between working capital management and company profitability and the impact of business cycles (downturns and booms) on the relationship between these two variables.in order to measure the working capital management, the four criteria of cash conversion cycle, payable period, receivables collection period and inventory turnover period, and in order to measure the profitability, the two criteria of return on assets and return on financial element assets have been used. To test the hypotheses, 107 companies were selected from the listed companies in Tehran Securities Exchange by systematic method during the years of 1385 to 1392 and the research variables were analyzed using Excel and Eviews software and Panel data model. The results of obtained from investigating the hypotheses confirm the negative relationship between cash cycle and receivables collection period with profitability. Inventories relationship was significant and positive with profitability and was different from the expected result (Significant positive) which led to the rejection of the hypothesis. There was no significant relationship between payable periods and profitability. To investigate the effect of business cycles on the relationship between these variables, the study period, according to market returns, divided into two periods downturns and boombs, the results show the impact of downturns on the relationship between these variables.

Organizations are entering a knowledge-based economy, an economy in which knowledge and intangible assets recognized as the most important competitive advantage. One of the components of intellectual capital is an intangible asset that has a significant impact on performance and strategic implementation of the identification, measurement and management of intellectual property is of particular importance and led to the observation of real value to organizations. To measure the various classifications of intellectual capital provided that one of these categories by Pulic name (value-added intellectual capital) raised the performance of the three components of human capital, structural capital efficiency and capital efficiency has been used up. The aim of study was to investigate the relationship between intellectual capital efficiency during the years 1383 to 1392 was assets. To test the hypothesis of audited financial data for eligible manufacturing companies in the software used Vrdnvyn period. EXCEL and software to test the hypothesis wide Azsfhh the SPSS20, correlation and regression analysis. The hypothesis, that the value-added components of intellectual capital, human capital efficiency, capital efficiency and return on assets employed Shrkthaartbat meaningful and positive. And structural capital efficiency and return on assets is a significant relationship.

No doubt the company's financial performance and the return on equity is among the most important factors in the decision-making users. With regard to the issue of the pillars of leading managers and company spent part of the campaign, expected to increase the efficiency of your company, through the promotion of brand reputation, followed by the customers and the volume of sales. In this regard, the present study is that the impact of the cost of advertising and brand value of the company's rate of return on assets and return on stocks was analyzed. So to achieve the main objective of this four hypothesis is designed to test the hypothesis of panel data of 110 companies in the Tehran Stock Exchange during 1388 to 1392 (550 years - the company) and the cumulative regression analysis was used. The results suggest four hypotheses are confirmed, meaning that the rate of return on assets and return on advertising spending and there is a significant positive relationship. The results showed a significant positive correlation between the rate of return on assets and return on equity company stock is trading.

In this study, the impact of voluntary disclosure of intellectual capital components on stock returns of companies listed in Tehran Stock Exchange's has been studied. In order to measure of voluntary disclosure of intellectual capital components, a checklist developed by Li (2007) and Ibekonel et al (2013), to gather information related to the disclosure of human capital, structural and relational capital by reports of the board of directors examined companies, has been used. Research data through multiple linear regression by using panel data and fixed effects were analyzed. In the course of this study, 137 companies through systematically sampling removed, the 5-year period 2011- 2014 statistical tests should be performed on them. The results show that this voluntary disclosure of intellectual capital components of stock returns is positive and significant effect. In other words, the components of intellectual capital, the greater the level of information disclosure, investor concerns and as a result, their investment risk will be reduced. In this case, their confidence level increase expected returns, to improve and to follow the trend of stock prices spiral upwards and eventually they will increase stock returns results in conformity with the findings of Li (2007).