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Imperfect Competition in Selection Markets

Author

Listed:
  • Neale Mahoney

    (University of Chicago Booth School of Business and NBER)

  • E. Glen Weyl

    (Microsoft Research and Yale University)

Abstract

Policies to correct market power and selection can be misguided when these forces coexist. We build a model of symmetric imperfect competition in selection markets that parameterizes the degree of market power and selection. We use graphical price-theoretic reasoning to characterize the interaction between these forces. Using a calibrated model of health insurance, we show that the risk adjustment commonly used to offset adverse selection can reduce coverage and social surplus. Conversely, in a calibrated model of subprime auto lending, realistic levels of competition can generate an oversupply of credit, implying that greater market power is desirable.

Suggested Citation

  • Neale Mahoney & E. Glen Weyl, 2017. "Imperfect Competition in Selection Markets," The Review of Economics and Statistics, MIT Press, vol. 99(4), pages 637-651, July.
  • Handle: RePEc:tpr:restat:v:99:y:2017:i:4:p:637-651
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    References listed on IDEAS

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    2. Mayordomo, Sergio & Pavanini, Nicola & Tarantino, Emanuele, 2020. "The Impact of Alternative Forms of Bank Consolidation on Credit Supply and Financial Stability," CEPR Discussion Papers 15069, C.E.P.R. Discussion Papers.
    3. Benjamin R. Handel & Jonathan T. Kolstad & Johannes Spinnewijn, 2019. "Information Frictions and Adverse Selection: Policy Interventions in Health Insurance Markets," The Review of Economics and Statistics, MIT Press, vol. 101(2), pages 326-340, May.
    4. de Meza, David & Reito, Francesco, 2019. "Too Little Lending: A Problem of Symmetric Information," MPRA Paper 93700, University Library of Munich, Germany.
    5. Annette Hofmann & Casey Rothschild, 2019. "On the efficiency of self-protection with spillovers in risk," The Geneva Risk and Insurance Review, Palgrave Macmillan;International Association for the Study of Insurance Economics (The Geneva Association), vol. 44(2), pages 207-221, September.
    6. Boone, Jan, 2020. "Pricing above Value: Selling to an Adverse Selection Market," Other publications TiSEM eda6a1de-4db6-49a6-87e4-3, Tilburg University, School of Economics and Management.
    7. Dosis, Anastasios, 2019. "Optimal ex post risk adjustment in markets with adverse selection," Journal of Mathematical Economics, Elsevier, vol. 85(C), pages 52-59.
    8. Michele Fioretti & Hongming Wang, 2020. "Performance Pay in Insurance Markets: Evidence from Medicare," Working Papers 2020.03, International Network for Economic Research - INFER.
    9. Geruso, Michael & Layton, Timothy J. & McCormack, Grace & Shepard, Mark, 2019. "The Two Margin Problem in Insurance Markets," Working Paper Series rwp19-035, Harvard University, John F. Kennedy School of Government.
    10. Florian Scheuer & Kent Smetters, 2018. "How Initial Conditions Can Have Permanent Effects: The Case of the Affordable Care Act," American Economic Journal: Economic Policy, American Economic Association, vol. 10(4), pages 302-343, November.
    11. Boone, Jan, 2020. "Pricing above Value: Selling to an Adverse Selection Market," Discussion Paper 2020-023, Tilburg University, Center for Economic Research.
    12. Boone, Jan, 2020. "Pricing above Value: Selling to an Adverse Selection Market," Other publications TiSEM 700b2f3e-d1c8-4422-9b54-f, Tilburg University, School of Economics and Management.

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