The Impact of Institutional Investors, Investment Horizons on ManagementEfficiency and Investment Decisions of the Companies

 Institutional investors play a crucial role in monitoring and reducing asymmetric information. Institutional investors reduce asymmetric information by demanding high quality in corporate governance practices and information disclosure that leads to informed decisions on investment choices. In the present study, the impact of institutional investors, investment horizons on management efficiency and investment decisions of the companies is investigated. In thes study, the data of 138 companies listed in tehrak stock Exchange during 2018-2011 were investigated. In order to test the hypothesis, Regression models with panel data method and fixed effects approach areused. The results of the testing of research hypotheses indicated that the short-term investment horizon of institutional investors has a negative and significant impact on management efficiency. also, The research findings indicated that the long–term investment horizon of institutional investors has a negative impact on the investment decisions and expenditures of companies with high operating cash flows, by the method based on Bushee(1998)and these investors(with lng-term investment horizon) reduce theinvestment decisions and expenditures of companies with limited funding. This finding could be due to the fact that the majority of institutional investors withlong–term investment horizon in companies with limited fundinghave absolute control and exacerbate the company's problems in order to extract private benefits.