摘要：In many countries, collective bargaining coverage is enhanced by government-issued extensions that widen the reach of collective agreements beyond their signatory parties to all firms and workers in the sector.This paper analyzes the causal impact of extensions using a natural experiment in Portugal that resulted in a sharp and unanticipated decline in the extension probability of agreements.Our results, based on a regression discontinuity design, indicate that extensions had a negative impact on employment growth.This effect is concentrated among nonaffiliated firms, which may reflect the limited representativeness of employer associations.
