voluntary disclosure of non-financial information

Some companies voluntarily disclose additional information in addition to disclosing minimum information in accordance with relevant standards and other laws and regulations. Voluntary disclosure or ethical disclosure is the disclosure that companies make in addition to the mandatory disclosure requirements. Information disclosure is always one of the most important factors in reducing agency problems and information asymmetry. In addition, adopting policies based on transparency and information disclosure is one of the most important factors in the process of optimal and desirable corporate governance. One of the most important benchmarks of corporate transparency in the present era is attention to social issues, sustainable development and sustainability. In this regard, the present study examined the relationship between dimensions of corporate power in voluntary disclosure of non-financial information and corporate sustainability performance. The statistical population of this study included all companies listed in Tehran Stock Exchange from 2008 to 1986 and the sample was selected through systematic elimination from the statistical population. According to the specified conditions, 112 companies were selected as the statistical sample of this study. It is worth noting that the hypotheses were tested by designing multivariate regression models. The results showed that firm strength as a moderating variable enhances firm performance.