The impact of industrial diversification on performance in companies listed in Tehran Stock Exchange

Diversification form of corporate strategy for the company that some managers had to use it to improve Efficiency. Diversification increased profitability through greater sales volume through new products and new markets is obtained. The most Diversification risk strategy of four kinds of ansov in the matrix offered strategy and carefully invested in this strategy is very necessary. Entering a market unfamiliar with the proposed products of unknown means lack of experience in skills and new techniques is required. So a big step in the company's uncertainty. In this study, the impact on Efficiency of diversification reviews. Course was a five-year period based on a financial year basis of 1393 to1398 up statistical society and the companies accepted in the Tehran stock exchange. The statistical methods used panel data analysis. The results obtained confirm the tale of long-term and short-term relationship between independent variables and variable productivity and long-term research in the short-term and in the form and pattern of OLS and the VAR confirmed.