Board Cultural Diversity and <scp>ESG</scp> Disclosure: Unveiling the Mediating Power of <scp>CSR</scp> Committees in Family Firms

ABSTRACT This study examines the impact of board cultural diversity on ESG disclosure in family firms, exploring the mediating role of the CSR committee. Using a sample of 298 listed European non‐financial family firms (2013–2022) and 2SLS models, we demonstrate that cultural diversity is positively associated with ESG disclosure, and the presence of a CSR committee mediates this relationship. Additionally, family ownership, family presence on the board, and CEO ownership are found to be negatively correlated with ESG disclosure. The results confirm the effectiveness of the CSR committee as a cognitive‐institutional mechanism that channels the board's cognitive resources into more structured sustainability practices. Findings provide policy guidance for enhancing ESG disclosure in family firms via board diversity and CSR committees.