Valuation Effects of Norway's Board Gender-Quota Law Revisited

• 成果类型: Article
• 署名作者: Eckbo, B. Espen; Nygaard, Knut; Thorburn, Karin S.
• 署名单位: Dartmouth College; Norwegian School of Economics (NHH); European Corporate Governance Institute; Oslo Metropolitan University (OsloMet); Centre for Economic Policy Research - UK
• 刊物名称: MANAGEMENT SCIENCE
• ISSN/ISSBN: 0025-1909
• DOI: 10.1287/mnsc.2021.4031
• 发表日期: 2022
• 页码: 4112-4134
• 关键词: Keywords; gender quota; BOARD DIVERSITY; valuation effect; return correlation; long-run performance

摘要

We highlight the complexities in estimating the valuation effects of board gender quotas by critically revisiting studies of Norway???s pioneering board gender-quota law. We use the short-run event study of Ahern and Dittmar [Ahern KR, Dittmar A (2012) The changing of the boards: The impact on firm valuation of mandated female board representation. Quart. J. Econom. 127(1):137???197] to illustrate (1) the difficulties in attributing quota-related news to specific dates, (2) the need to account for contemporaneous crosscorrelation of stock returns when judging the statistical significance of event-related abnormal stock returns, and (3) the fundamental difficulty of separating quota-induced valuation effects from the influences of firm characteristics and macroeconomic events such as the financial crisis. We provide new evidence suggesting that the valuation effect of Norway???s quota law was statistically insignificant. Overall, our evidence suggests that, at the time of the Norwegian quota, the supply of qualified female director candidates was high enough to avoid the negative consequences of the quota highlighted previously in the literature.