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This study investigates management ability, product market competition, and corporate behavior. Research evidence are consists of all the companies listed on the Tehran Stock Exchange during 2013 to 2021. To collect the research data, Rahvard Novin and Tadabipardaz database were used. This research is a descriptive-analytical research. The multiple regressions based on static panel were tested in Eveiws software to examine the research hypotheses. The findings indicate managerial ability has a significant effect on market share growth, and product market competition has a significant impact on market share growth. Also, managerial ability has a moderating effect on the relationship between product market competition and market share growth.
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