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Spillover between Medicare and Medicaid: Evidence from decreasing physician reimbursements

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  • Kole Reddig

Abstract

This paper studies the effect of large changes in Medicaid reimbursement rates on the quantity of care supplied to Medicare beneficiaries. In 2015, the payment parity provision of the Affordable Care Act ended, causing widespread decreases in reimbursements to primary care providers for Medicaid services. Difference‐in‐differences and triple‐differences model estimates show that decreasing physician payments for Medicaid caused a small increase in the number of services provided to Medicare beneficiaries. I explore the mechanisms driving this result, giving context and insight into some current puzzles regarding the effects of the ACA's Medicaid expansion.

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  • Kole Reddig, 2024. "Spillover between Medicare and Medicaid: Evidence from decreasing physician reimbursements," Contemporary Economic Policy, Western Economic Association International, vol. 42(2), pages 223-236, April.
    • Handle: RePEc:bla:coecpo:v:42:y:2024:i:2:p:223-236
    DOI: 10.1111/coep.12639
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    References listed on IDEAS

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    1. Sarah Miller & Norman Johnson & Laura R Wherry, 2021. "Medicaid and Mortality: New Evidence From Linked Survey and Administrative Data," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 136(3), pages 1783-1829.
    2. David Card, 1992. "Using Regional Variation in Wages to Measure the Effects of the Federal Minimum Wage," ILR Review, Cornell University, ILR School, vol. 46(1), pages 22-37, October.
    3. Cutler, David M & Gruber, Jonathan, 1996. "The Effect of Medicaid Expansions on Public Insurance, Private Insurance, and Redistribution," American Economic Review, American Economic Association, vol. 86(2), pages 378-383, May.
    4. Neprash, Hannah T. & Zink, Anna & Sheridan, Bethany & Hempstead, Katherine, 2021. "The effect of Medicaid expansion on Medicaid participation, payer mix, and labor supply in primary care," Journal of Health Economics, Elsevier, vol. 80(C).
    5. Colleen M. Carey & Sarah Miller & Laura R. Wherry, 2020. "The Impact of Insurance Expansions on the Already Insured: The Affordable Care Act and Medicare," American Economic Journal: Applied Economics, American Economic Association, vol. 12(4), pages 288-318, October.
    6. David Card, 1992. "Using Regional Variation in Wages to Measure the Effects of the Federal Minimum Wage," Working Papers 680, Princeton University, Department of Economics, Industrial Relations Section..
    7. Melissa McInerney & Jennifer M. Mellor & Lindsay M. Sabik, 2017. "The Effects of State Medicaid Expansions for Working-Age Adults on Senior Medicare Beneficiaries," American Economic Journal: Economic Policy, American Economic Association, vol. 9(3), pages 408-438, August.
    8. Callaway, Brantly & Sant’Anna, Pedro H.C., 2021. "Difference-in-Differences with multiple time periods," Journal of Econometrics, Elsevier, vol. 225(2), pages 200-230.
    9. Joshua D. Gottlieb & Maria Polyakova & Kevin Rinz & Hugh Shiplett & Victoria Udalova, 2023. "Who Values Human Capitalists' Human Capital? The Earnings and Labor Supply of U.S. Physicians," NBER Working Papers 31469, National Bureau of Economic Research, Inc.
    10. Andreas Olden & Jarle Møen, 2022. "The triple difference estimator [Semiparametric difference-in-differences estimators]," The Econometrics Journal, Royal Economic Society, vol. 25(3), pages 531-553.
    11. Weber, Caroline E., 2014. "Toward obtaining a consistent estimate of the elasticity of taxable income using difference-in-differences," Journal of Public Economics, Elsevier, vol. 117(C), pages 90-103.
    12. Johanna Catherine Maclean & Chandler McClellan & Michael F. Pesko & Daniel Polsky, 2023. "Medicaid reimbursement rates for primary care services and behavioral health outcomes," Health Economics, John Wiley & Sons, Ltd., vol. 32(4), pages 873-909, April.
    13. Frank Sloan & Janet Mitchell & Jerry Cromwell, 1978. "Physician Participation in State Medicaid Programs," NBER Chapters, in: The Economics of Physician and Patient Behavior, pages 211-245, National Bureau of Economic Research, Inc.
    14. Craig L. Garthwaite, 2012. "The Doctor Might See You Now: The Supply Side Effects of Public Health Insurance Expansions," American Economic Journal: Economic Policy, American Economic Association, vol. 4(3), pages 190-215, August.
    15. Amy Finkelstein, 2007. "The Aggregate Effects of Health Insurance: Evidence from the Introduction of Medicare," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 122(1), pages 1-37.
    16. Glied, Sherry & Hong, Kai, 2018. "Health care in a multi-payer system: Spillovers of health care service demand among adults under 65 on utilization and outcomes in medicare," Journal of Health Economics, Elsevier, vol. 60(C), pages 165-176.
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