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Private Information and Insurance Rejections: A Comment

Author

Listed:
  • Andrea Attar

    (DEF and CEIS, Università di Roma "Tor Vergata" and Toulouse School of Economics)

  • Thomas Mariotti

    (Toulouse School of Economics, CNRS)

  • François Salanié

    (Toulouse School of Economics, INRA)

Abstract
We show that a necessary and sufficient condition for entry to be unprofitable in markets with adverse selection is that that no buyer type be willing to trade at a price above the expected unit cost of serving those types who are weakly more eager to trade than her. We provide two applications of this result. First, we characterize cases in which market breakdown occurs, thereby generalizing the main result of Hendren (2013). Second, we characterize entry-proof tariffs on nonexclusive active markets, thereby generalizing the main result of Glosten (1994). Our analysis paves the way to new tests of adverse selection, notably besides the case of inactive markets studied by Hendren (2013).

Suggested Citation

  • Andrea Attar & Thomas Mariotti & François Salanié, 2017. "Private Information and Insurance Rejections: A Comment," CEIS Research Paper 403, Tor Vergata University, CEIS, revised 03 May 2017.
    • Handle: RePEc:rtv:ceisrp:403
    as

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    References listed on IDEAS

    as
    1. Mailath, George J. & Nöldeke, Georg, 2008. "Does competitive pricing cause market breakdown under extreme adverse selection?," Journal of Economic Theory, Elsevier, vol. 140(1), pages 97-125, May.
    2. Attar, Andrea & Mariotti, Thomas & Salanié, François, 2014. "Multiple Contracting in Insurance Markets," TSE Working Papers 14-532, Toulouse School of Economics (TSE), revised Sep 2016.
    3. Nathaniel Hendren, 2013. "Private Information and Insurance Rejections," Econometrica, Econometric Society, vol. 81(5), pages 1713-1762, September.
    4. Samuelson, William F, 1984. "Bargaining under Asymmetric Information," Econometrica, Econometric Society, vol. 52(4), pages 995-1005, July.
    5. Attar, Andrea & Mariotti, Thomas & Salanié, François, 2019. "On competitive nonlinear pricing," Theoretical Economics, Econometric Society, vol. 14(1), January.
    6. Andrea Attar & Thomas Mariotti & François Salanié, 2011. "Nonexclusive Competition in the Market for Lemons," Econometrica, Econometric Society, vol. 79(6), pages 1869-1918, November.
    7. Hellwig, Martin F., 1988. "A note on the specification of interfirm communication in insurance markets with adverse selection," Journal of Economic Theory, Elsevier, vol. 46(1), pages 154-163, October.
    8. Rochet, J. C., 1985. "The taxation principle and multi-time Hamilton-Jacobi equations," Journal of Mathematical Economics, Elsevier, vol. 14(2), pages 113-128, April.
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    12. Glosten, Lawrence R, 1994. "Is the Electronic Open Limit Order Book Inevitable?," Journal of Finance, American Finance Association, vol. 49(4), pages 1127-1161, September.
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    14. , & , & ,, 2014. "Nonexclusive competition under adverse selection," Theoretical Economics, Econometric Society, vol. 9(1), January.
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    More about this item

    Keywords

    Adverse Selection; Entry Proofness; Market Breakdown; Nonexclusivity6;
    All these keywords.

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • D8 - Microeconomics - - Information, Knowledge, and Uncertainty

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