Studying the Effects of Product Market Competition on Agency Costs of Companies Listed on Tehran Stock Exchange Hooshmand Abdolhamida,*, Paidar Gholam Abbasb, Hosseinirad Seyed Davoudc, Barzegar Elahehd aAssistant Prof., Department of accounting, Management and economic college, Shiraz Branch, Islamic Azad University, Shiraz, Iran bDepartment of accounting, management and economic college, Shiraz Branch, Islamic Azad University, Shiraz, Iran cDepartment of Accounting, College of human science, Kohgiloyeh and Boyerahmad branch, Islamic azad university, Kohgiloyeh and Boyerahmad, Iran dAssistant Prof., Department of accounting, management and economic college, Shiraz Branch, Islamic Azad University, Shiraz, Iran *Corresponding author: hamidaban@gmail.com
Online published on 15 September, 2015. Abstract The present study mainly aims to examine the effects of product market competition on agency costs of companies listed on Tehran Stock Exchange. Thus, this study is going to find an answer to the question whether there is a significant relationship between product market competition and agency costs of listed companies on Tehran Stock Exchange. The population of this research is the companies listed on Tehran Stock Exchange, which 67 of them have been examined, as the statistical sample, in a period from 2004 to 2011. The results of this research indicates that there is a significant inverse relationship between market competition and agency costs scales. Top Keywords Product Market Competition, Agency Costs, Herfindahl-Hirschman Index. Top |