In Support of Slow Science: Robust, Open, and Multidisciplinary

Does a greater representation of women in top management teams (TMTs) contribute to higher firm performance? Although several studies have investigated this question, they have failed to sufficiently account for endogeneity. We address the endogeneity problem by using an instrumental variable (IV) design to estimate the causal effect of women's representation in TMTs on firm performance. We use a shift-share or Bartik-type instrument, which is well-established in economics but has received little attention in management and leadership research. We analyze the effect of TMT gender diversity on four types of firm performance: profitability, market-based performance, liquidity, and growth. Our sample is based on firms in the S&P 1,500, which we observe over 24 years (1997–2020). Our findings indicate that TMT gender diversity positively affects the profitability, liquidity, and growth of firms but does not impact market-based performance. We also analyze whether the effect of TMT gender diversity was stronger during two economic crises, namely the 2008/2009 financial crisis and the COVID-19 pandemic, but our instrumental variable analysis provides no evidence for such an interaction effect. Our results are robust to multiple alternative specifications. This study contributes to research on strategic leadership, specifically regarding the effect of women leaders, as well as the crisis leadership literature.