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Medical insurance and free choice of physician shape patient overtreatment: A laboratory experiment

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  • Huck, Steffen
  • Lünser, Gabriele
  • Spitzer, Florian
  • Tyran, Jean-Robert

Abstract

In a laboratory experiment designed to capture key aspects of the interaction between physicians and patients, we study the effects of medical insurance and competition in the guise of free choice of physician, including observability of physicians’ market shares. Medical treatment is an example of a credence good: only the physician knows the appropriate treatment, the patient does not. Even after a consultation, the patient is not sure whether he received the right treatment or whether he was perhaps overtreated. We find that with insurance, moral hazard looms on both sides of the market: patients consult more often and physicians overtreat more often than in the baseline condition. Competition decreases overtreatment compared to the baseline and patients therefore consult more often. When the two institutions are combined, competition is found to partially offset the adverse effects of insurance: most patients seek treatment, but overtreatment is moderated.

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  • Huck, Steffen & Lünser, Gabriele & Spitzer, Florian & Tyran, Jean-Robert, 2016. "Medical insurance and free choice of physician shape patient overtreatment: A laboratory experiment," Journal of Economic Behavior & Organization, Elsevier, vol. 131(PB), pages 78-105.
    • Handle: RePEc:eee:jeborg:v:131:y:2016:i:pb:p:78-105
    DOI: 10.1016/j.jebo.2016.06.009
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    Cited by:

    1. Mimra, Wanda & Rasch, Alexander & Waibel, Christian, 2016. "Second opinions in markets for expert services: Experimental evidence," Journal of Economic Behavior & Organization, Elsevier, vol. 131(PB), pages 106-125.
    2. Hafner, Lucas & Reif, Simon & Seebauer, Michael, 2017. "Physician behavior under prospective payment schemes: Evidence from artefactual field and lab experiments," FAU Discussion Papers in Economics 18/2017, Friedrich-Alexander University Erlangen-Nuremberg, Institute for Economics.
    3. Bruno Lanz & Evert Reins, 2019. "Asymmetric information on the market for energy efficiency: Insights from the credence goods literature," IRENE Working Papers 19-03, IRENE Institute of Economic Research.
    4. Brosig-Koch, Jeannette & Hehenkamp, Burkhard & Kokot, Johanna, 2016. "The effects of competition on medical service provision," Annual Conference 2016 (Augsburg): Demographic Change 145589, Verein für Socialpolitik / German Economic Association.
    5. repec:eee:jeborg:v:154:y:2018:i:c:p:362-378 is not listed on IDEAS
    6. Angelova, Vera & Regner, Tobias, 2018. "Can a bonus overcome moral hazard? Experimental evidence from markets for expert services," Journal of Economic Behavior & Organization, Elsevier, vol. 154(C), pages 362-378.

    More about this item

    Keywords

    Credence good; Physician; Overtreatment; Competition; Insurance;

    JEL classification:

    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • I11 - Health, Education, and Welfare - - Health - - - Analysis of Health Care Markets
    • I13 - Health, Education, and Welfare - - Health - - - Health Insurance, Public and Private

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