Purpose: Recently, there has been an increasing interest in corporate governance as well as in sustainability. However, the link between corporate governance and sustainability is still under debate. The current study provides evidence on whether sustainability assurance levels are linked to corporate governance mechanisms. Specifically, we examine the association between corporate governance mechanisms (ownership structure, governance characteristics), characteristics of the company, the type of assurance provider, and sustainability assurance levels in the French context. Methodology: We collected the necessary data about the CAC 40 firms from 2008 to 2018 and opted for an ordinal regression model with panel data. Findings: Results indicate that corporate governance mechanisms play a vital role in providing sustainability assurance levels. Most corporate governance mechanisms, especially the board size, the executive incentive compensation, the sensitivity of sectors, and the type of assurance provider have a significant impact on sustainability assurance levels. The findings of this study show that the board size has a positive association with the level of sustainability assurance, hence favoring the choice of a reasonable assurance level. On the other hand, the executive incentive compensation, the sensitivity of sectors and the type of assurance provider are negatively associated with the assurance level, hence implying the choice of a moderate level.Implications: The paper offers useful insights for firms, stakeholders, and other users of the reports, as they will have a deeper understanding of sustainability assurance practices. The size of the sample might be a limitation of this study.Contribution: This is the first study that empirically tests the association between governance mechanisms and sustainability assurance levels. Furthermore, this study contributes to the existing literature and highlights the impact of governance mechanisms on sustainability assurance levels.
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