Relationship between Income Quality and Cost of Equity: the Role of Voluntary Disclosure of Non-Financial Information and Sustainability Performance

Relationship between Income Quality and Cost of Equity: the Role of Voluntary Disclosure of Non-Financial Information and Sustainability PerformanceThe purpose of this study is to investigate the relationship between income quality (IQ) and cost of equity (CEC) through the role of voluntary disclosure of non-financial information and sustainability performance (SP). SP indicators (60 indicators) are used in three economic, social and environmental dimensions to measure the voluntary disclosure of non-financial information at both retrospective and prospective levels and SP, and the data of 120 firms in the period of 2015-2021 have been used to calculate research variables. The results of data analysis using multiple regression and panel data method indicate that the IQ does not have a significant effect on the CEC, which is observed by entering the adjusting variables (voluntary disclosure and SP). Voluntary retrospective and prospective non-financial information and SP have a significant impact on the relationship between the IQ and CEC.