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This paper aims to examine the effect of critical mass of women managers on corporate boards on the voluntary disclosure of climate change in a developing country in which the regulations on climate change disclosure is an area of growing research interest.

This study uses logistic panel regression models with a sample of 1,001 firm-years for companies in the Borsa Istanbul 100 Index that were asked to disclose voluntary climate change indicators over the seven-year period from 2014 to 2020 through the Carbon Disclosure Project.

This paper provides evidence from an emerging country that the critical mass of women on the board has no impact on voluntary climate change disclosure. In addition, the presence of independent managers on the board was found to have a significant impact on climate change disclosure. In addition, the results show that larger companies are more likely to report their climate change activities. Large companies are more visible due to their size, are perceived by stakeholders as more polluting and are, therefore, more likely to report on the environment.

The results show that the critical mass of women on the board has no effect on voluntary disclosure of climate change. Empirical tests are still needed to strengthen the overall validity of the critical mass of at least three women on boards in Türkiye.

Despite many valuable insights provided by critical mass theory, very few studies directly address critical mass and voluntary disclosure of climate change. To the best of the authors’ knowledge, this study is the first empirical and comprehensive paper in the Turkish context evaluating critical masses and voluntary corporate climate change giving a comparison between firms listed on financial industry and nonfinancial industry.

This paper investigates whether board gender diversity is associated with the propensity to prioritize environmental issues in the material topic list on Global Reporting Initiative (GRI)-based reports.

Regressions analyses are performed using a sample of 755 firm-year observations from Italy over the 2018–2022 period. The data were obtained from hand-collection on GRI-based reports and Refinitiv Eikon database. Board gender diversity is measured through three proxies: the natural logarithm of the number of women directors, the ratio of female representation on board and the Blau index reflecting the proportion of women/men on board. Additional tests are also developed.

Results show that board gender diversity positively influences the propensity to rank environmental issues at the top of the material topic list on GRI-based reports.

Since the study focuses on the Italian context, results cannot be subjective to an extensive generalization to other countries.

This study highlights the importance of strengthening the female participation on board to prioritize the firm’s impact on environment within the materiality assessment of sustainability reporting.

To the best of the authors’ knowledge, this study is the first to investigate the association between board gender diversity and the highest ranked environmental material topics, thus contributing to better understand the role of women directors on materiality assessment within sustainability reporting.