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Strategic Formulary Design in Medicare Part D Plans

Author

Listed:
  • Kurt Lavetti
  • Kosali Simon

Abstract

The design of Medicare Part D causes most beneficiaries to receive fragmented health insurance, with drug and medical coverage separated. Fragmentation is potentially inefficient since separate insurers optimize over only one component of healthcare spending, despite complementarities and substitutabilities between healthcare types. Fragmentation of only some plans can also lead to market distortions due to differential adverse selection, as integrated plans may use drug formularies to induce enrollment by patients that are profitable in the medical insurance market. We study the design of insurance plans in Medicare Part D and find that formularies reflect these two differences in incentives.

Suggested Citation

  • Kurt Lavetti & Kosali Simon, 2018. "Strategic Formulary Design in Medicare Part D Plans," American Economic Journal: Economic Policy, American Economic Association, vol. 10(3), pages 154-192, August.
    • Handle: RePEc:aea:aejpol:v:10:y:2018:i:3:p:154-92
    Note: DOI: 10.1257/pol.20160248
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    More about this item

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G22 - Financial Economics - - Financial Institutions and Services - - - Insurance; Insurance Companies; Actuarial Studies
    • H51 - Public Economics - - National Government Expenditures and Related Policies - - - Government Expenditures and Health
    • I13 - Health, Education, and Welfare - - Health - - - Health Insurance, Public and Private
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health
    • L65 - Industrial Organization - - Industry Studies: Manufacturing - - - Chemicals; Rubber; Drugs; Biotechnology; Plastics

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