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Competition among Health Maintenance Organizations

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  • William E. Encinosa
  • David E. M. Sappington

Abstract

We develop a model of competition among health maintenance organizations (HMOs) to analyze the effects of market power, scale economies, and asymmetric knowledge of health risk on market outcomes. We find that competition among HMOs may, but need not, ensure socially preferred outcomes. Market power or scale economies can sometimes admit socially preferred outcomes when they would otherwise not arise. Asymmetric knowledge of health risk may or may not be constraining. When it is constraining, a variety of patterns of incomplete health insurance can arise, along with excessive or insufficient treatment and preventive care for either high-risk or low-risk individuals. Copyright (c) 1997 Massachusetts Institute of Technology.

Suggested Citation

  • William E. Encinosa & David E. M. Sappington, 1997. "Competition among Health Maintenance Organizations," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 6(1), pages 129-150, March.
  • Handle: RePEc:bla:jemstr:v:6:y:1997:i:1:p:129-150
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    Cited by:

    1. Laurence C. Baker & Kenneth S. Corts, 1995. "The Effects of HMOs on Conventional Insurance Premiums: Theory and Evidence," NBER Working Papers 5356, National Bureau of Economic Research, Inc.
    2. Thomas G. McGuire & Jacob Glazer, 2000. "Optimal Risk Adjustment in Markets with Adverse Selection: An Application to Managed Care," American Economic Review, American Economic Association, vol. 90(4), pages 1055-1071, September.
    3. Olivella, Pau & Vera-Hernandez, Marcos, 2007. "Competition among differentiated health plans under adverse selection," Journal of Health Economics, Elsevier, vol. 26(2), pages 233-250, March.
    4. Daniel McFadden & Carlos Noton & Pau Olivella, 2015. "Minimum coverage regulation in insurance markets," SERIEs: Journal of the Spanish Economic Association, Springer;Spanish Economic Association, vol. 6(3), pages 247-278, August.
    5. Belli, Paolo, 2001. "How adverse selection affects the health insurance market," Policy Research Working Paper Series 2574, The World Bank.
    6. Glazer, Jacob & McGuire, Thomas G., 2011. "Gold and Silver health plans: Accommodating demand heterogeneity in managed competition," Journal of Health Economics, Elsevier, vol. 30(5), pages 1011-1019.
    7. Bradley Herring, 2010. "Suboptimal provision of preventive healthcare due to expected enrollee turnover among private insurers," Health Economics, John Wiley & Sons, Ltd., vol. 19(4), pages 438-448.
    8. Pau Olivella & Marcos Vera-Hernandez, 2010. "How complex are the contracts offered by health plans?," SERIEs: Journal of the Spanish Economic Association, Springer;Spanish Economic Association, vol. 1(3), pages 305-323, July.

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