This paper presents novel empirical evidence for the prediction from Becker’s (1957) famous theory, that competition will drive discrimination out of the market. We use a comprehensive firm entry deregulation reform in Portugal as a quasi-natural experiment to study the effect of increased product market competition on gender discrimination. We use employer-employee data for the universe of private sector firms and workers, and exploit the staggered implementation of the reform across municipalities for identification. Increased competition following the deregulation reduces the gender pay gap for medium- and high-skill workers but not for the low-skilled. The gender pay gap is also reduced for workers in managerial positions, except for the CEO. We also find that the share of females in managerial positions increased in affected municipalities. Existing evidence has shown that gender discrimination reduces output; our findings suggest that deregulation can contribute to reduce inefficiencies arising from gender discrimination.

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