The effect of risk control on the relationship between firm value and benefit components using the model Easton and Pae in companies listed on the Tehran Stock Exchange

In this research has been investigated the impact of controlling for risk on explanatory power of relevance between earnings and returns Using the model Easton and Pae. Observations have been sorted based on varios risk proxies. For test of impact controlling for risk on explanatory power of the regressions. In this research, risk proxies are including beta, firm size, earnings / price ratio, two implied cost of equity capital proxies, the combinution of beta and firm size and book-market ratio. Also, earnings-returns regressions has been estimated into risk portfolios. 128 firms select across of the listed firms in the Tehran stock exchange as simple for the period 2009-2014 years. Thise research is application view point aim. Research method is correlation view point content. The model has been estimated using multiple regression model. In the all of  hypotheses, research's finding indicate growth in adjusted R2s between earnings and returns, in presence risk proxies, except hypothese 2.   Generally, explanatory power of the earnings-returns regressions increase with the impact of controlling cross- sectional variation in risk.