*M.A. Student of
**M.A. of Auditing,
The main purpose of this study is investigating the relationship between capital structure and investment efficiency. The sample of this study, includes 87 companies listed in the Tehran Stock Exchange during the period 2009 to 2013 and for processing and testing hypothesis, Estimated Generalized Least Squares (EGLS) method is used. Study results show that capital structure (leverage) has a negative and significant impact on the investment efficiency.
Capital Structure, Leverage, Overinvestment, Underinvestment, Investment Efficiency