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Making their own weather? Estimating employer labour-market power and its wage effects

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  • Martins, Pedro S.
  • Melo, António

Abstract

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 implications 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.

Suggested Citation

  • Martins, Pedro S. & Melo, António, 2024. "Making their own weather? Estimating employer labour-market power and its wage effects," Journal of Urban Economics, Elsevier, vol. 139(C).
    • Handle: RePEc:eee:juecon:v:139:y:2024:i:c:s0094119023000840
    DOI: 10.1016/j.jue.2023.103614
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    Cited by:

    1. Marinescu, Ioana & Ouss, Ivan & Pape, Louis-Daniel, 2021. "Wages, hires, and labor market concentration," Journal of Economic Behavior & Organization, Elsevier, vol. 184(C), pages 506-605.
    2. Wenjing Duan & Pedro S. Martins, 2022. "Rent sharing in China: Magnitude, heterogeneity and drivers," British Journal of Industrial Relations, London School of Economics, vol. 60(1), pages 176-219, March.
    3. Bassanini, Andrea & Batut, Cyprien & Caroli, Eve, 2023. "Labor Market Concentration and Wages: Incumbents versus New Hires," Labour Economics, Elsevier, vol. 81(C).
    4. Pedro S. Martins, 2021. "30,000 Minimum Wages: The Economic Effects of Collective Bargaining Extensions," British Journal of Industrial Relations, London School of Economics, vol. 59(2), pages 335-369, June.
    5. Martins, Pedro S., 2020. "What Do Employers' Associations Do?," IZA Discussion Papers 13705, Institute of Labor Economics (IZA).
    6. Boeri, Tito & Garnero, Andrea & Luisetto, Lorenzo Giovanni, 2023. "Non-compete Agreements in a Rigid Labour Market: The Case of Italy," IZA Discussion Papers 16021, Institute of Labor Economics (IZA).
    7. Bassanini, Andrea & Batut, Cyprien & Caroli, Eve, 2021. "Labor Market Concentration and Stayers' Wages: Evidence from France," IZA Discussion Papers 14912, Institute of Labor Economics (IZA).
    8. Martins, Pedro S. & Dai, Li & Duan, Wenjing, 2024. "Local labour concentration moderates the disemployment effects of minimum wages in China," GLO Discussion Paper Series 1504, Global Labor Organization (GLO).
    9. Vitor Costa, 2023. "Local Labor Market Effects of Mergers and Acquisitions in Developing Countries: Evidence from Brazil," Papers 2306.08797, arXiv.org.
    10. Martins, Pedro S. & Melo, António, 2024. "Making their own weather? Estimating employer labour-market power and its wage effects," Journal of Urban Economics, Elsevier, vol. 139(C).
    11. Popp, Martin, 2024. "Minimum Wages in Concentrated Labor Markets," IZA Discussion Papers 17357, Institute of Labor Economics (IZA).

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    More about this item

    Keywords

    Oligopsony; Wages; Regional labour markets; Worker mobility; Portugal;
    All these keywords.

    JEL classification:

    • J42 - Labor and Demographic Economics - - Particular Labor Markets - - - Monopsony; Segmented Labor Markets
    • J31 - Labor and Demographic Economics - - Wages, Compensation, and Labor Costs - - - Wage Level and Structure; Wage Differentials
    • J63 - Labor and Demographic Economics - - Mobility, Unemployment, Vacancies, and Immigrant Workers - - - Turnover; Vacancies; Layoffs

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