M.A. Thesis:

Ownership concentration ٫ Conservatism and Earnings persistence

Abstract: Accounting conservatism is an important feature in the high quality of financial reporting and can be converted as a mechanism to balance the interests of managers and shareholders of the company and reduce the asymmetry of information between these two groups. Earning Sustainability, one of the quality criteria Profit and profit from higher quality will provide more information about the company's financial performance and provide a fair indication of the future profitability process. Since ownership of companies in Asia, such as Iran, has a high degree of focus. Therefore, in this research, we studies the effect of ownership concentration on conservative accounting and Earning Sustainability For this purpose, the information for the period 2011 to 2016 was collected for 112 companies listed in Tehran Stock Exchange and the hypotheses have been tested by multivariate linear regression analysis using the data panel method. The calculation of conservatism was carried out by fitting the Basu model 1997 with the regression method (mild transmission regression). We used the data of companies listed in Tehran Stock Exchange during the period of 2007 to 2017 to increase the accuracy in calculating conservatism and to calculate the stability Profit from the Sloan model of 1996 was used. The research hypotheses were tested by multivariate linear regression analysis using the data panel method. For this purpose, financial information of 112 companies during the period of 5 years from 2011 to 2016 was prepared and collected. Ownership concentration in this Research, shareholders have been defined above 5% The results of this paper show that there is a negative relationship between ownership concentration and conservatism, and there is a positive relationship between ownership concentration and Earning Sustainability. The existence of a negative relationship between ownership concentration and conservatism shows that ownership concentration can negatively affect the efficiency of conservatism in the analysis of securities portfolios and this can be confirmed by the hypothesis of opportunistic behavior. On the other hand, there is a positive relationship between ownership concentration and profitability stability shows that high-end companies have more profit-oriented sustainability because major shareholders, with their active supervision, direct managers towards high-quality returns, and this is the hypothesis of demand for quality-based reporting. .

Keywords: Ownership concentration, Conservatism , Earnings persistence