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Credible Research Designs for Minimum Wage Studies

Author

Listed:
  • Sylvia Allegretto
  • Arindrajit Dube
  • Michael Reich
  • Ben Zipperer

Abstract

The authors assess the critique by Neumark, Salas, and Wascher (2014) of minimum wage studies that found small effects on teen employment. Data from 1979 to 2014 contradict NSW; the authors show that the disemployment suggested by a model assuming parallel trends across U.S. states mostly reflects differential pre-existing trends. A data-driven LASSO procedure that optimally corrects for state trends produces a small employment elasticity (–0.01). Even a highly sparse model rules out substantial disemployment effects, contrary to NSW’s claim that the authors discard too much information. Synthetic controls do place more weight on nearby states—confirming the value of regional controls—and generate an elasticity of −0.04. A similar elasticity (−0.06) obtains from a design comparing contiguous border counties, which the authors show to be good controls. NSW’s preferred matching estimates mix treatment and control units, obtain poor matches, and find the highest employment declines where the relative minimum wage falls. These findings refute NSW’s key claims.

Suggested Citation

  • Sylvia Allegretto & Arindrajit Dube & Michael Reich & Ben Zipperer, 2017. "Credible Research Designs for Minimum Wage Studies," ILR Review, Cornell University, ILR School, vol. 70(3), pages 559-592, May.
    • Handle: RePEc:sae:ilrrev:v:70:y:2017:i:3:p:559-592
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    JEL classification:

    • J08 - Labor and Demographic Economics - - General - - - Labor Economics Policies
    • J23 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Labor Demand
    • J38 - Labor and Demographic Economics - - Wages, Compensation, and Labor Costs - - - Public Policy
    • J42 - Labor and Demographic Economics - - Particular Labor Markets - - - Monopsony; Segmented Labor Markets
    • J63 - Labor and Demographic Economics - - Mobility, Unemployment, Vacancies, and Immigrant Workers - - - Turnover; Vacancies; Layoffs
    • J64 - Labor and Demographic Economics - - Mobility, Unemployment, Vacancies, and Immigrant Workers - - - Unemployment: Models, Duration, Incidence, and Job Search

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