Exploring Gender Diversity, Board Heterogeneity, and Corporate Risk Outcomes: Evidence from STOXX600 Firms

This study examines the evolving role of board heterogeneity, including gender diversity, board attributes, and governance practices, in shaping corporate risk outcomes. In mature governance settings, corporate risk management emerges from the interaction between board structure, independence, leadership arrangements, and boardroom composition, such that gender diversity in isolation may no longer fully capture board effectiveness. We argue that while gender diversity remains relevant, its explanatory power operates in conjunction with other board characteristics that condition the quality of decision-making in already well-functioning boards. Using multiple regression estimations on a sample of STOXX600 firms, our main outcomes show that in mature European boards gender diversity (1) improves the operational efficiency, conditional by model specification, (2) increase debts level to finance growth, thereby enabling more rapid expansion than would otherwise be possible, without pushing to extensive borrowing, while reduce leverage starting 33% (3) prevents corporate failure starting 40% women on board (4) gender-diverse boards increase liquidity when critical mass is met (33%). Overall, the findings suggest that gender-diverse boards contribute to a reconfiguration of firms’ risk exposure across operational, financial, liquidity, and failure dimensions, rather than a uniform reduction in risk.