Thesis:

Corporate governance, environmental performance and social responsibility disclosure and its impact on company value.

Corporate governance includes laws, regulations, processes, cultures and systems that achieve the goals of accountability, transparency, justice and respect for the rights of stakeholders. Therefore, the aim of the present study is to determine the effect of the characteristics of the board of directors as a representative of corporate governance and environmental performance on the value of the company with the mediating role of social responsibility disclosure, and also to evaluate the role of the board of directors by considering the mediating effect of social responsibility in protecting the interests of stakeholders through company value. Accordingly, the value of the company is the dependent variable, and the independent variable is corporate governance, which in this study, three criteria of the board of directors were used, including: board size, board independence. This study was conducted for a 6-year period from 1397 to 1402 and in 105 companies listed on the Tehran Stock Exchange. After examining the availability of the data, the sample data of the companies under study were collected, categorized, and analyzed using Excel software. The results of the study showed that there is a significant relationship between both board characteristics examined in this study, including board size and board independence, and company value. There is also a significant relationship between environmental performance and company value. Social responsibility had a positive and significant effect on the relationship between the variables examined in this study. As a result, social responsibility of most companies moderates the relationship between board characteristics and environmental performance with company value.

Keywords: Company value, board size, board independence, corporate governance, social responsibility