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Physician Behavior under Prospective Payment Schemes—Evidence from Artefactual Field and Lab Experiments

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  • Simon Reif

    (Department of Economics, University of Erlangen-Nuremberg, Findelgasse 7, 90402 Nürnberg, Germany
    RWI—Leibniz Institute for Economic Research, Hohenzollernstr. 1-3, 45128 Essen, Germany)

  • Lucas Hafner

    (Department of Economics, University of Erlangen-Nuremberg, Findelgasse 7, 90402 Nürnberg, Germany)

  • Michael Seebauer

    (Department of Economics, University of Erlangen-Nuremberg, Findelgasse 7, 90402 Nürnberg, Germany)

Abstract

Recent experimental studies analyze the behavior of physicians towards patients and find that physicians care for their own profit as well as patient benefit. In this paper, we extend the experimental analysis of the physician decision problem by adding a third party which represents the health insurance that finances medical service provision under a prospective payment scheme. Our results show that physicians take into account the payoffs of the third party, which can lead to underprovision of medical care. We conduct a laboratory experiment in neutral as well as in medical framing using students and medical doctors as subjects. Subjects in the medically framed experiments behave weakly and are more patient orientated in contrast to neutral framing. A sample of medical doctors exhibits comparable behavior to students with medical framing.

Suggested Citation

  • Simon Reif & Lucas Hafner & Michael Seebauer, 2020. "Physician Behavior under Prospective Payment Schemes—Evidence from Artefactual Field and Lab Experiments," IJERPH, MDPI, vol. 17(15), pages 1-37, July.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:15:p:5540-:d:392562
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    1. Brosig-Koch, Jeannette & Hennig-Schmidt, Heike & Kairies-Schwarz, Nadja & Wiesen, Daniel, 2016. "Using artefactual field and lab experiments to investigate how fee-for-service and capitation affect medical service provision," Journal of Economic Behavior & Organization, Elsevier, vol. 131(PB), pages 17-23.
    2. Charness, Gary & Rabin, Matthew, 2001. "Understanding Social Preferences with Simple Tests," Department of Economics, Working Paper Series qt4qz9k8vg, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
    3. Kesternich, Iris & Schumacher, Heiner & Winter, Joachim, 2015. "Professional norms and physician behavior: Homo oeconomicus or homo hippocraticus?," Journal of Public Economics, Elsevier, vol. 131(C), pages 1-11.
    4. Jordi Brandts & Gary Charness, 2011. "The strategy versus the direct-response method: a first survey of experimental comparisons," Experimental Economics, Springer;Economic Science Association, vol. 14(3), pages 375-398, September.
    5. Hennig-Schmidt, Heike & Selten, Reinhard & Wiesen, Daniel, 2011. "How payment systems affect physicians' provision behaviour--An experimental investigation," Journal of Health Economics, Elsevier, vol. 30(4), pages 637-646, July.
    6. repec:zbw:rwirep:0413 is not listed on IDEAS
    7. Amitabh Chandra & Jonathan Skinner, 2012. "Technology Growth and Expenditure Growth in Health Care," Journal of Economic Literature, American Economic Association, vol. 50(3), pages 645-680, September.
    8. repec:zbw:rwirep:0414 is not listed on IDEAS
    9. Jeannette Brosig‐Koch & Heike Hennig‐Schmidt & Nadja Kairies‐Schwarz & Daniel Wiesen, 2017. "The Effects of Introducing Mixed Payment Systems for Physicians: Experimental Evidence," Health Economics, John Wiley & Sons, Ltd., vol. 26(2), pages 243-262, February.
    10. Erik O. Kimbrough & Alexander Vostroknutov, 2016. "Norms Make Preferences Social," Journal of the European Economic Association, European Economic Association, vol. 14(3), pages 608-638, June.
    11. Peter Martinsson & Emil Persson, 2019. "Physician behavior and conditional altruism: the effects of payment system and uncertain health benefit," Theory and Decision, Springer, vol. 87(3), pages 365-387, October.
    12. Jürges, Hendrik & Köberlein, Juliane, 2015. "What explains DRG upcoding in neonatology? The roles of financial incentives and infant health," Journal of Health Economics, Elsevier, vol. 43(C), pages 13-26.
    13. Heike Hennig‐Schmidt & Hendrik Jürges & Daniel Wiesen, 2019. "Dishonesty in health care practice: A behavioral experiment on upcoding in neonatology," Health Economics, John Wiley & Sons, Ltd., vol. 28(3), pages 319-338, March.
    14. Ben Greiner, 2015. "Subject pool recruitment procedures: organizing experiments with ORSEE," Journal of the Economic Science Association, Springer;Economic Science Association, vol. 1(1), pages 114-125, July.
    15. Uri Gneezy & Stephan Meier & Pedro Rey-Biel, 2011. "When and Why Incentives (Don't) Work to Modify Behavior," Journal of Economic Perspectives, American Economic Association, vol. 25(4), pages 191-210, Fall.
    16. Glenn W. Harrison & John A. List, 2004. "Field Experiments," Journal of Economic Literature, American Economic Association, vol. 42(4), pages 1009-1055, December.
    17. Godager, Geir & Wiesen, Daniel, 2013. "Profit or patients’ health benefit? Exploring the heterogeneity in physician altruism," Journal of Health Economics, Elsevier, vol. 32(6), pages 1105-1116.
    18. 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.
    19. Lagarde, Mylène & Blaauw, Duane, 2017. "Physicians’ responses to financial and social incentives: A medically framed real effort experiment," Social Science & Medicine, Elsevier, vol. 179(C), pages 147-159.
    20. Glenn W. Harrison & Morten I. Lau & E. Elisabet Rutström, 2007. "Estimating Risk Attitudes in Denmark: A Field Experiment," Scandinavian Journal of Economics, Wiley Blackwell, vol. 109(2), pages 341-368, June.
    21. Brekke, Kurt R. & Holmås, Tor Helge & Monstad, Karin & Straume, Odd Rune, 2017. "Do treatment decisions depend on physicians' financial incentives?," Journal of Public Economics, Elsevier, vol. 155(C), pages 74-92.
    22. Klaus Abbink & Heike Hennig-Schmidt, 2006. "Neutral versus loaded instructions in a bribery experiment," Experimental Economics, Springer;Economic Science Association, vol. 9(2), pages 103-121, June.
    23. Andreoni, James, 2007. "Giving gifts to groups: How altruism depends on the number of recipients," Journal of Public Economics, Elsevier, vol. 91(9), pages 1731-1749, September.
    24. Moreno-Serra, Rodrigo & Wagstaff, Adam, 2010. "System-wide impacts of hospital payment reforms: Evidence from Central and Eastern Europe and Central Asia," Journal of Health Economics, Elsevier, vol. 29(4), pages 585-602, July.
    25. Leemore S. Dafny, 2005. "How Do Hospitals Respond to Price Changes?," American Economic Review, American Economic Association, vol. 95(5), pages 1525-1547, December.
    26. Marlies Ahlert & Stefan Felder & Bodo Vogt, 2012. "Which patients do I treat? An experimental study with economists and physicians," Health Economics Review, Springer, vol. 2(1), pages 1-11, December.
    27. Brosig-Koch, Jeannette & Hennig-Schmidt, Heike & Kairies, Nadja & Wiesen, Daniel, 2013. "How Effective are Pay-for-Performance Incentives for Physicians? – A Laboratory Experiment," Ruhr Economic Papers 413, RWI - Leibniz-Institut für Wirtschaftsforschung, Ruhr-University Bochum, TU Dortmund University, University of Duisburg-Essen.
    28. Wang, Jian & Iversen , Tor & Hennig-Schmidt , Heike & Godager , Geir, 2019. "Are patient-regarding preferences stable?," HERO Online Working Paper Series 2020:2, University of Oslo, Health Economics Research Programme, revised 02 Mar 2020.
    29. Reif, Simon & Wichert, Sebastian & Wuppermann, Amelie, 2018. "Is it good to be too light? Birth weight thresholds in hospital reimbursement systems," Journal of Health Economics, Elsevier, vol. 59(C), pages 1-25.
    30. Sibilla Di Guida & Dorte Gyrd‐Hansen & Anne Sophie Oxholm, 2019. "Testing the myth of fee‐for‐service and overprovision in health care," Health Economics, John Wiley & Sons, Ltd., vol. 28(5), pages 717-722, May.
    31. Christoph Engel, 2011. "Dictator games: a meta study," Experimental Economics, Springer;Economic Science Association, vol. 14(4), pages 583-610, November.
    32. Cutler, David M, 1995. "The Incidence of Adverse Medical Outcomes under Prospective Payment," Econometrica, Econometric Society, vol. 63(1), pages 29-50, January.
    33. Urs Fischbacher, 2007. "z-Tree: Zurich toolbox for ready-made economic experiments," Experimental Economics, Springer;Economic Science Association, vol. 10(2), pages 171-178, June.
    34. Dirk Engelmann & Martin Strobel, 2004. "Inequality Aversion, Efficiency, and Maximin Preferences in Simple Distribution Experiments," American Economic Review, American Economic Association, vol. 94(4), pages 857-869, September.
    35. Gary Charness & Matthew Rabin, 2002. "Understanding Social Preferences with Simple Tests," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 117(3), pages 817-869.
    36. Vincenzo Atella & Karen Hassell & Ellen Schafheutle & Marjorie C. Weiss & Peter R. Noyce, 2003. "Cost to the Patient or Cost to the Healthcare System? Which one Matters the Most for GP Prescribing Decisions? A UK-Italy Comparison," CEIS Research Paper 1, Tor Vergata University, CEIS.
    37. Green, Ellen P., 2014. "Payment systems in the healthcare industry: An experimental study of physician incentives," Journal of Economic Behavior & Organization, Elsevier, vol. 106(C), pages 367-378.
    38. Dominic Coey, 2015. "Physicians' financial incentives and treatment choices in heart attack management," Quantitative Economics, Econometric Society, vol. 6(3), pages 703-748, November.
    39. Wang, Jian & Iversen, Tor & Hennig-Schmidt, Heike & Godager, Geir, 2020. "Are patient-regarding preferences stable? Evidence from a laboratory experiment with physicians and medical students from different countries," European Economic Review, Elsevier, vol. 125(C).
    40. Line Bjørnskov Pedersen & Julie Riise & Arne Risa Hole & Dorte Gyrd-Hansen, 2014. "GPs' shifting agencies in choice of treatment," Applied Economics, Taylor & Francis Journals, vol. 46(7), pages 750-761, March.
    41. Hanming Fang & Qing Gong, 2017. "Detecting Potential Overbilling in Medicare Reimbursement via Hours Worked," American Economic Review, American Economic Association, vol. 107(2), pages 562-591, February.
    42. Kairies, Nadja & Krieger, Miriam, 2013. "How do Non-Monetary Performance Incentives for Physicians Affect the Quality of Medical Care? – A Laboratory Experiment," Ruhr Economic Papers 414, RWI - Leibniz-Institut für Wirtschaftsforschung, Ruhr-University Bochum, TU Dortmund University, University of Duisburg-Essen.
    43. Brosig-Koch, Jeannette & Hennig-Schmidt, Heike & Kairies-Schwarz, Nadja & Kokot, Johanna & Wiesen, Daniel, 2020. "Physician performance pay: Experimental evidence," HERO Online Working Paper Series 2020:3, University of Oslo, Health Economics Research Programme.
    44. Heiner Schumacher & Iris Kesternich & Michael Kosfeld & Joachim Winter, 2017. "One, Two, Many—Insensitivity to Group Size in Games with Concentrated Benefits and Dispersed Costs," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 84(3), pages 1346-1377.
    45. Silverman, Elaine & Skinner, Jonathan, 2004. "Medicare upcoding and hospital ownership," Journal of Health Economics, Elsevier, vol. 23(2), pages 369-389, March.
    46. Davis, Carolyne K. & Rhodes, Deborah J., 1988. "The impact of DRGs on the cost and quality of health care in the United States," Health Policy, Elsevier, vol. 9(2), pages 117-131, April.
    47. Chalkley, Martin & Listl, Stefan, 2018. "First do no harm – The impact of financial incentives on dental X-rays," Journal of Health Economics, Elsevier, vol. 58(C), pages 1-9.
    48. Ellis, Randall P. & McGuire, Thomas G., 1986. "Provider behavior under prospective reimbursement : Cost sharing and supply," Journal of Health Economics, Elsevier, vol. 5(2), pages 129-151, June.
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    Cited by:

    1. Jeannette Brosig‐Koch & Burkhard Hehenkamp & Johanna Kokot, 2023. "Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics," Health Economics, John Wiley & Sons, Ltd., vol. 32(8), pages 1785-1817, August.
    2. Brosig-Koch, Jeannette & Hennig-Schmidt, Heike & Kairies-Schwarz, Nadja & Kokot, Johanna & Wiesen, Daniel, 2024. "A new look at physicians’ responses to financial incentives: Quality of care, practice characteristics, and motivations," Journal of Health Economics, Elsevier, vol. 94(C).
    3. Bardey, David & Kembou, Samuel & Ventelou, Bruno, 2021. "Physicians’ incentives to adopt personalised medicine: Experimental evidence," Journal of Economic Behavior & Organization, Elsevier, vol. 191(C), pages 686-713.
    4. Wang, Jian & Iversen, Tor & Hennig-Schmidt, Heike & Godager, Geir, 2020. "Are patient-regarding preferences stable? Evidence from a laboratory experiment with physicians and medical students from different countries," European Economic Review, Elsevier, vol. 125(C).
    5. Silvia Angerer & Daniela Glätzle-Rützler & Christian Waibel, 2021. "Trust in health care credence goods: Experimental evidence on framing and subject pool effects," Working Papers 2021-13, Faculty of Economics and Statistics, Universität Innsbruck.
    6. Claudia Keser & Claude Montmarquette & Martin Schmidt & Cornelius Schnitzler, 2020. "Custom-made health-care: an experimental investigation," Health Economics Review, Springer, vol. 10(1), pages 1-12, December.
    7. Massimo Finocchiaro Castro & Calogero Guccio & Domenica Romeo, 2024. "Looking inside the lab: a systematic literature review of economic experiments in health service provision," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 25(7), pages 1177-1204, September.
    8. Finocchiaro Castro, Massimo & Guccio, Calogero & Romeo, Domenica, 2022. "A systematic literature review of 10 years of behavioral research on health services," EconStor Preprints 266248, ZBW - Leibniz Information Centre for Economics.
    9. Johann Han & Nadja Kairies-Schwarz & Markus Vomhof, 2024. "Strategic behaviour and decision making in competitive hospital markets: an experimental investigation," International Journal of Health Economics and Management, Springer, vol. 24(3), pages 333-355, September.
    10. Nadja Kairies-Schwarz & Claudia Souček, 2020. "Performance Pay in Hospitals: An Experiment on Bonus–Malus Incentives," IJERPH, MDPI, vol. 17(22), pages 1-29, November.
    11. Atehortua, S & Rodríguez-Valencia, A, 2021. "Physician s Allocation Preferences under Scarcity and Uncertainty," Documentos de Trabajo 19665, Universidad del Rosario.
    12. Brosig-Koch, Jeannette & Groß, Mona & Hennig-Schmidt, Heike & Kairies-Schwarz, Nadja & Wiesen, Daniel, 2021. "Physicians' incentives, patients' characteristics, and quality of care: A systematic experimental comparison of fee-for-service, capitation, and pay for performance," Ruhr Economic Papers 923, RWI - Leibniz-Institut für Wirtschaftsforschung, Ruhr-University Bochum, TU Dortmund University, University of Duisburg-Essen.
    13. Attema, Arthur E. & Galizzi, Matteo M. & Groß, Mona & Hennig-Schmidt, Heike & Karay, Yassin & L’Haridon, Olivier & Wiesen, Daniel, 2023. "The formation of physician altruism," Journal of Health Economics, Elsevier, vol. 87(C).
    14. Waibel, Christian & Wiesen, Daniel, 2021. "An experiment on referrals in health care," European Economic Review, Elsevier, vol. 131(C).
    15. Byambadalai, Undral & Ma, Ching-to Albert & Wiesen, Daniel, 2023. "Changing preferences: An experiment and estimation of market-incentive effects on altruism," Journal of Health Economics, Elsevier, vol. 92(C).
    16. Franziska Brendel & Lisa Einhaus & Franziska Then, 2021. "Resource scarcity and prioritization decisions in medical care: A lab experiment with heterogeneous patient types," Health Economics, John Wiley & Sons, Ltd., vol. 30(2), pages 470-477, February.
    17. Angerer, Silvia & Glätzle-Rützler, Daniela & Waibel, Christian, 2023. "Framing and subject pool effects in healthcare credence goods," Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), Elsevier, vol. 103(C).

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    More about this item

    Keywords

    health economic experiment; framing; physician behavior; prospective payment schemes;
    All these keywords.

    JEL classification:

    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • C93 - Mathematical and Quantitative Methods - - Design of Experiments - - - Field Experiments
    • I11 - Health, Education, and Welfare - - Health - - - Analysis of Health Care Markets
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health

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