Corporate governance and sustainability reporting quality: evidence from Nigeria

Purpose: This study aims to examine the association between corporate governance and sustainability reporting quality of listed firms in Nigeria. Design/methodology/approach: The authors measure corporate governance using board governance variables (board size, board independence, board gender diversity and board expertise) and audit committee attributes (audit committee size, audit expertise and audit meeting). The authors measured sustainability reporting quality using a scoring system, which ranges between 0 and 4. The highest score is achieved when sustainability reporting is independently assured by an audit firm. The lowest score refers to the absence of sustainability reporting. The study emphasizes 120 listed firms on Nigeria Stock Exchange using the ordered logistic regression technique. Findings: The results indicate that board governance variables (board size, board gender diversity and board expertise) and audit committee attributes (audit committee size, audit expertise and audit meeting) are significantly associated with sustainability reporting quality. Additional analysis reveals that external assurance contributes to the quality of sustainability reporting through corporate governance characteristics. Research limitations/implications: This study is restricted to a single country. Future studies should consider a cross-country study, which may help to establish a comparative analysis. Likewise, the future study could consider other regression techniques using a continuous measurement of the global reporting initiative in measuring sustainability reporting quality. Practical implications: This study’s findings have important implications for policymakers and practitioners, especially the corporate executives and top management. Companies are encouraged to restructure their board to enhance better monitoring and support towards better sustainability reporting. Social implications: Disclosure on sustainability reporting helps corporate organizations advance the issues of sustainability both nationally and globally. Originality/value: This current study adds to accounting literature by examining how corporate governance contributes to sustainability reporting practices within the Nigerian context. Drawing from the result, the study provides strong interconnectivity between the corporate board and audit committee in driving sustainability reporting quality within an organizational context.