More than 100 countries have a gender quota, or an effort to increase gender equality and representation, in their political system. Many opponents of gender quotas argue that women elected via quotas are not always the most qualified candidates; the quotas may displace qualified men; and the quotas are not compatible with meritocratic principles and incentives. However, despite the years of debate, exactly how gender quotas affect the competence of elected officials – whether women or men – has rarely been studied.