IDEAS home Printed from https://ideas.repec.org/p/doj/eagpap/200905.html
   My bibliography  Save this paper

Does Competition Among Medicare Advantage Plans Matter?: An Empirical Analysis of the Effects of Local Competition in a Regulated Environment

Author

Listed:
  • Abe Dunn

    () (Economist, Antitrust Division, U.S. Department of Justice, Washington, DC 20530)

Abstract

The regulatory oversight of the private Medicare Advantage (MA) program makes the role of competition in this market unclear. This paper empirically examines the impact of competition by measuring the effects of changes in market structure on enrollment. The study examines competition in local geographic markets using county-level enrollment data from 2001-07. I find that an increase in the number of competitors results in an increase in the number of enrollees served ­ consistent with competition motivating firms to provide more generous benefits. Competition also results in an increase in product proliferation, which highlights a dimension of competition not previously examined. Overall, the results are similar to what one might expect in an unregulated environment, suggesting that there are benefits from competition that are not realized by regulation alone.

Suggested Citation

  • Abe Dunn, 2009. "Does Competition Among Medicare Advantage Plans Matter?: An Empirical Analysis of the Effects of Local Competition in a Regulated Environment," EAG Discussions Papers 200905, Department of Justice, Antitrust Division.
  • Handle: RePEc:doj:eagpap:200905
    as

    Download full text from publisher

    File URL: https://www.justice.gov/atr/public/eag/248399.pdf
    Download Restriction: no

    References listed on IDEAS

    as
    1. Dunn, Abe, 2010. "The value of coverage in the medicare advantage insurance market," Journal of Health Economics, Elsevier, vol. 29(6), pages 839-855, December.
    2. Strombom, Bruce A. & Buchmueller, Thomas C. & Feldstein, Paul J., 2002. "Switching costs, price sensitivity and health plan choice," Journal of Health Economics, Elsevier, vol. 21(1), pages 89-116, January.
    3. Wholey, Douglas & Feldman, Roger & Christianson, Jon B., 1995. "The effect of market structure on HMO premiums," Journal of Health Economics, Elsevier, vol. 14(1), pages 81-105, May.
    4. Shiko Maruyama, 2006. "Welfare Analysis Incorporating a Structural Entry-Exit Model: A Case Study of Medicare HMOs," Hi-Stat Discussion Paper Series d06-166, Institute of Economic Research, Hitotsubashi University.
    5. Jean Marie Abraham & Martin Gaynor & William B Vogt, 2003. "Entry and Competition in Local Hospital Markets," The Centre for Market and Public Organisation 03/088, Department of Economics, University of Bristol, UK.
    6. Leemore Dafny & David Dranove, 2008. "Do report cards tell consumers anything they don't already know? The case of Medicare HMOs," RAND Journal of Economics, RAND Corporation, vol. 39(3), pages 790-821.
    7. Evans, William N & Froeb, Luke M & Werden, Gregory J, 1993. "Endogeneity in the Concentration-Price Relationship: Causes, Consequences, and Cures," Journal of Industrial Economics, Wiley Blackwell, vol. 41(4), pages 431-438, December.
    8. David Dranove & Anne Gron & Michael J. Mazzeo, 2003. "Differentiation and Competition in HMO Markets," Journal of Industrial Economics, Wiley Blackwell, vol. 51(4), pages 433-454, December.
    9. Davis, Peter, 2005. "The Effect of Local Competition on Admission Prices in the U.S. Motion Picture Exhibition Market," Journal of Law and Economics, University of Chicago Press, vol. 48(2), pages 677-708, October.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ken Heyer & Nicholas Hill, 2008. "The Year in Review: Economics at the Antitrust Division, 2007–2008," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 33(3), pages 247-262, November.

    More about this item

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:doj:eagpap:200905. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Tung Vu). General contact details of provider: http://edirc.repec.org/data/atrgvus.html .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.