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Insurance in a Market for Credence Goods

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  • Kai Sülzle
  • Achim Wambach

Abstract

We study the impact of insurance on the amount of fraud in a physician-patient relationship. In a market for credence goods, where prices are regulated by an authority, physicians act as experts. Due to their informational advantage, physicians have an incentive to cheat by inducing inappropriate treatment levels. It is shown that a higher coinsurance rate may lead to either less fraud in the market and a lower probability of patients searching for second opinions or more fraud and more searches. We also show that a higher coinsurance rate corresponds with a higher level of physicians specialising.

Suggested Citation

  • Kai Sülzle & Achim Wambach, 2002. "Insurance in a Market for Credence Goods," CESifo Working Paper Series 677, CESifo Group Munich.
  • Handle: RePEc:ces:ceswps:_677
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    File URL: http://www.cesifo-group.de/DocDL/cesifo_wp677.pdf
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    References listed on IDEAS

    as
    1. Lacker, Jeffrey M & Weinberg, John A, 1989. "Optimal Contracts under Costly State Falsification," Journal of Political Economy, University of Chicago Press, vol. 97(6), pages 1345-1363, December.
    2. Marie-Cécile Fagart & Pierre Picard, 1999. "Optimal Insurance Under Random Auditing," The Geneva Risk and Insurance Review, Palgrave Macmillan;International Association for the Study of Insurance Economics (The Geneva Association), vol. 24(1), pages 29-54, June.
    3. Keith J. Crocker & John Morgan, 1998. "Is Honesty the Best Policy? Curtailing Insurance Fraud through Optimal Incentive Contracts," Journal of Political Economy, University of Chicago Press, vol. 106(2), pages 355-375, April.
    4. Dilip Mookherjee & Ivan Png, 1989. "Optimal Auditing, Insurance, and Redistribution," The Quarterly Journal of Economics, Oxford University Press, vol. 104(2), pages 399-415.
    5. Asher Wolinsky, 1993. "Competition in a Market for Informed Experts' Services," RAND Journal of Economics, The RAND Corporation, vol. 24(3), pages 380-398, Autumn.
    6. Emons, Winand, 2001. "Credence goods monopolists," International Journal of Industrial Organization, Elsevier, vol. 19(3-4), pages 375-389, March.
    7. Townsend, Robert M., 1979. "Optimal contracts and competitive markets with costly state verification," Journal of Economic Theory, Elsevier, vol. 21(2), pages 265-293, October.
    Full references (including those not matched with items on IDEAS)

    Citations

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    Cited by:

    1. Georges Dionne, 2012. "The Empirical Measure of Information Problems with Emphasis on Insurance Fraud and Dynamic Data," Cahiers de recherche 1233, CIRPEE.
    2. Winand Emons, 2013. "Incentive-Compatible Reimbursement Schemes for Physicians," Journal of Institutional and Theoretical Economics (JITE), Mohr Siebeck, Tübingen, vol. 169(4), pages 605-620, December.
    3. 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.
    4. Fong, Yuk-fai & Liu, Ting & Wright, Donald J., 2014. "On the role of verifiability and commitment in credence goods markets," International Journal of Industrial Organization, Elsevier, vol. 37(C), pages 118-129.
    5. 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.
    6. Loukas Balafoutas & Rudolf Kerschbamer & Matthias Sutter, 2017. "Second‐Degree Moral Hazard In A Real‐World Credence Goods Market," Economic Journal, Royal Economic Society, vol. 127(599), pages 1-18, February.
    7. Hyndman, Kyle & Ozerturk, Saltuk, 2011. "Consumer information in a market for expert services," Journal of Economic Behavior & Organization, Elsevier, vol. 80(3), pages 628-640.
    8. Ouyang, Yaofu, 2016. "Credence Goods, Risk Averse, and Optimal Insurance," MPRA Paper 70392, University Library of Munich, Germany.
    9. Bonroy, Olivier & Lemarié, Stéphane & Tropéano, Jean-Philippe, 2013. "Credence goods, experts and risk aversion," Economics Letters, Elsevier, vol. 120(3), pages 464-467.
    10. Dulleck, Uwe & Kerschbamer, Rudolf, 2009. "Experts vs. discounters: Consumer free-riding and experts withholding advice in markets for credence goods," International Journal of Industrial Organization, Elsevier, vol. 27(1), pages 15-23, January.
    11. Jennifer Brown & Dylan B. Minor, 2012. "Misconduct in Credence Good Markets," NBER Working Papers 18608, National Bureau of Economic Research, Inc.
    12. Jennifer Brown & Dylan Minor, 2015. "Misconduct in Financial Services: Differences across Organizations," Harvard Business School Working Papers 16-022, Harvard Business School.
    13. Dominik Erharter, 2012. "Credence goods markets, distributional preferences and the role of institutions," Working Papers 2012-11, Faculty of Economics and Statistics, University of Innsbruck.
    14. Vincze, János, 2010. "Miért és mitől védjük a fogyasztókat?. Aszimmetrikus információ és/vagy korlátozott racionalitás
      [Asymmetric information and/or bounded rationality: why are consumers protected and from what?]
      ," Közgazdasági Szemle (Economic Review - monthly of the Hungarian Academy of Sciences), Közgazdasági Szemle Alapítvány (Economic Review Foundation), vol. 0(9), pages 725-752.
    15. Alexander Rasch & Christian Waibel, 2013. "What drives fraud in a credence goods market? Evidence from a field study," CER-ETH Economics working paper series 13/179, CER-ETH - Center of Economic Research (CER-ETH) at ETH Zurich.
    16. repec:cgr:cgsser:03-07 is not listed on IDEAS
    17. Nell, Martin & Schiller, Jörg, 2002. "Erklärungsansätze für vertragswidriges Verhalten von Versicherungsnehmern aus Sicht der ökonomischen Theorie," Working Papers on Risk and Insurance 7, University of Hamburg, Institute for Risk and Insurance.
    18. Dulleck, Uwe & Kerschbamer, Rudolf, 2005. "Experts vs Discounters: Competition and Market Unravelling When Consumers Do Not Know What they Need," CEPR Discussion Papers 5242, C.E.P.R. Discussion Papers.

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