期刊
JOURNAL OF URBAN ECONOMICS
卷 139, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jue.2023.103614
关键词
Oligopsony; Wages; Regional labour markets; Worker mobility; Portugal
This study measures employer power and its wage implications using comprehensive matched employer-employee data. The findings suggest that employer concentration negatively affects wages, but only a small percentage of workers are exposed to this concentration.
The subdued wage growth observed in many countries has spurred interest in monopsony views of regional labour markets. This study measures the extent and robustness of employer power and its wage implica-tions exploiting comprehensive matched employer-employee data. We find average (employment-weighted) Herfindhal indices of 800 to 1,100, stable over the 1986-2019 period covered, and that typically less than 8% of workers are exposed to concentration levels thought to raise market power concerns. When controlling for both worker and firm heterogeneity and instrumenting for concentration, we find that wages are negatively affected by employer concentration, with elasticities of around -1.4%. We also find that several methodological choices can change significantly both the measurement of concentration and its wage effects.
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