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

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  • Pedro S. Martins

Abstract

The subdued wage growth observed over the last years in many countries has spurred renewed interest in monopsony views of the labour market. This paper is the first to measure the extent and robustness of employer labour-market power and its wage implications exploiting comprehensive matched employer-employee data. We find average (employment-weighted) Herfindhal indices of 800 to 1,100; and that less than 9% of workers are exposed to concentration levels thought to raise market power concerns. However, these figures can increase significantly with different methodological choices. Finally, when holding worker composition constant and instrumenting concentration, wages are found to be negatively affected by employer concentration, with elasticities of between -1.5% and -3%.

Suggested Citation

  • Pedro S. Martins, 2018. "Making their own weather? Estimating employer labour-market power and its wage effects," Working Papers 95, Queen Mary, University of London, School of Business and Management, Centre for Globalisation Research.
    • Handle: RePEc:cgs:wpaper:95
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    References listed on IDEAS

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    1. David Card & Ana Rute Cardoso & Joerg Heining & Patrick Kline, 2018. "Firms and Labor Market Inequality: Evidence and Some Theory," Journal of Labor Economics, University of Chicago Press, vol. 36(S1), pages 13-70.
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    7. David Autor & David Dorn & Lawrence F Katz & Christina Patterson & John Van Reenen, 2020. "The Fall of the Labor Share and the Rise of Superstar Firms [“Automation and New Tasks: How Technology Displaces and Reinstates Labor”]," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 135(2), pages 645-709.
    8. Pierre Cahuc & Pauline Carry & Franck Malherbet & Pedro S. Martins, 2023. "Spillover effects of employment protection," Nova SBE Working Paper Series wp655, Universidade Nova de Lisboa, Nova School of Business and Economics.
    9. Luís M B Cabral & José Mata, 2003. "On the Evolution of the Firm Size Distribution: Facts and Theory," American Economic Review, American Economic Association, vol. 93(4), pages 1075-1090, September.
    10. Sónia Cabral & Pedro S. Martins & João Pereira dos Santos & Mariana Tavares, 2021. "Collateral Damage? Labour Market Effects of Competing with China—at Home and Abroad," Economica, London School of Economics and Political Science, vol. 88(350), pages 570-600, April.
    11. 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.
    12. Azar, José & Marinescu, Ioana & Steinbaum, Marshall & Taska, Bledi, 2020. "Concentration in US labor markets: Evidence from online vacancy data," Labour Economics, Elsevier, vol. 66(C).
    13. Efraim Benmelech & Nittai K. Bergman & Hyunseob Kim, 2022. "Strong Employers and Weak Employees: How Does Employer Concentration Affect Wages?," Journal of Human Resources, University of Wisconsin Press, vol. 57(S), pages 200-250.
    14. Bassanini, Andrea & Batut, Cyprien & Caroli, Eve, 2023. "Labor Market Concentration and Wages: Incumbents versus New Hires," Labour Economics, Elsevier, vol. 81(C).
    15. Serguey Braguinsky & Lee G. Branstetter & Andre Regateiro, 2011. "The Incredible Shrinking Portuguese Firm," NBER Working Papers 17265, National Bureau of Economic Research, Inc.
    16. Torberg Falch, 2010. "The Elasticity of Labor Supply at the Establishment Level," Journal of Labor Economics, University of Chicago Press, vol. 28(2), pages 237-266, April.
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    Cited by:

    1. 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.
    2. 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).
    3. 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.
    4. Bassanini, Andrea & Batut, Cyprien & Caroli, Eve, 2023. "Labor Market Concentration and Wages: Incumbents versus New Hires," Labour Economics, Elsevier, vol. 81(C).
    5. 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.
    6. Martins, Pedro S., 2020. "What Do Employers' Associations Do?," IZA Discussion Papers 13705, Institute of Labor Economics (IZA).
    7. 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).
    8. Boeri, Tito Michele & Garnero, Andrea & Luisetto, Lorenzo G., 2023. "Non-compete agreements in a rigid labour market: the case of Italy," LSE Research Online Documents on Economics 121338, London School of Economics and Political Science, LSE Library.
    9. Vitor Costa, 2023. "Local Labor Market Effects of Mergers and Acquisitions in Developing Countries: Evidence from Brazil," Papers 2306.08797, arXiv.org.

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    More about this item

    Keywords

    Oligopsony; Wages; 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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