Investigating the impact of moderating the CEO duality and institutional shareholders on the relationship between managerial ability and lack of transparency of company information

The main purpose of this study is to investigate the impact of corporate governance on the relationship between managerial ability and lack of information transparency in listed companies in Tehran Stock Exchange. Research hypotheses based on the 106 companies during a 9-year period from 2010 to 2018 were tested using multivariate regression models. Demerjian & et al. (2012) model was used to measure management ability and to calculate the corporate opacity, the criteria of the index rate of lack of transparency in company information and discretionary accrual items were used. The results show that there is a negative significant relationship between managerial ability and lack of transparency of company information. Also, the CEO duality has a negative impact on the relationship between managerial ability and lack of transparency of company information (in particular, discretionary accrual items). Finally, institutional shareholders have a negative effect on the relationship between managerial ability and lack of transparency of company information (the index rate of lack of transparency in company information and discretionary accrual items).