Medicaid, Earnings, and Heterogeneous Treatment Effects: Evidence from the Oregon Health Insurance Experiment

Tidemann Krieg ()
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Tidemann Krieg: Department of Economics and Finance, Niagara University, NY, USA

The B.E. Journal of Economic Analysis & Policy, 2021, vol. 21, issue 4, 1319-1345

Abstract: The Medicaid and labor supply empirical literature offers competing conclusions of zero effects and significant reductions in earnings. However, zero effects are only theoretically consistent with the earnings distribution’s extremes. Medicaid participants with positive pre-treatment labor supply should unequivocally decrease earnings. This paper clarifies the literature’s ambiguity by combining quantile regression with data from the Oregon Health Insurance Experiment. The distributional impacts imply that zero effects are not universally representative of Medicaid households. The annual earnings impact of Medicaid participation ranges between increases of $1400 to deceases of $3120 for single adults. Pre-existing mental illness or health constraints on work account for counterintuitive positive earnings impacts. By demonstrating that sample compositional differences determine whether Medicaid’s labor supply impact is zero or negative, this paper offers a reconciliation to the range of existing estimates in the empirical literature.

Keywords: Medicaid; Oregon Health Insurance Experiment; labor supply; heterogeneity (search for similar items in EconPapers)
JEL-codes: H75 I18 I38 J22 (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1515/bejeap-2020-0270

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