The impact of managers' ability on competition in the product market and company behavior

The purpose of this study is to investigate the effect of managers' ability on competition in the product market and company behavior. The Herfindel-Hirschman index was used to measure product market competition, the three factors of firm value, firm market share growth and investment activities were used to measure firm behavior, and the Demerjian et al. (2012) index was used to measure managers' ability. In this study, the data of 114 companies listed on the Tehran Stock Exchange during the period 2013- 2019 were analyzed using multiple regression analysis based on composite data. The results showed that the ability of managers has a significant effect on product market competition, company value and investment activities. In addition, the effect of managers' ability on the growth of the company's market share was not statistically confirmed.