标题：Studying the relationship between the institutional investors, influence, the price gap and market efficiency in the companies listed in Tehran stock exchange
摘要：The purpose of this research is to study the effect of institutional investors, influence on the price gap and the market efficiency of companies. This research is a library and analytic-casual study and it is according to the panel data analysis. In this research, the financial information of 102 companies listed on Tehran stock exchange has been studied during the time period of 2010-2015 (612 companies-year). In order to analyze the obtained results of the research, Spss 20, Eviews 7 and Minintab 16 have been used. The research results in relation with confirming the first hypothesis indicated that there is meaningful and direct relationship between the institutional investors, influence and price gap of companies. Also the research results in relation with rejecting the second hypothesis indicated that there is not meaningful relationship between the institutional investors, influence and market efficiency
关键词：Institutional investors; influence; price gap; market efficiency and data panel
