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Cream Skimming, Dregs Skimming, and Pooling: On the Dynamics of Competitive Screening


  • Lund, Diderik

    (Department of Economics, Copenhagen Business School)

  • Nilssen, Tore

    (Department of Economics, Copenhagen Business School)


We discuss the existence of a pooling equilibrium in a two-period model of an insurance market with asymmetric information. We solve the model numerically. We pay particular attention to the reasons for non-existence in cases where no pooling equilibrium exists. In addition to the phenom- enon of cream skimming emphasized in earlier literature, we here point to the the importance of the opposite: dregs skimming, whereby high-risk consumers are proÞtably detracted from the candidate pooling contract.

Suggested Citation

  • Lund, Diderik & Nilssen, Tore, 2003. "Cream Skimming, Dregs Skimming, and Pooling: On the Dynamics of Competitive Screening," Working Papers 01-2003, Copenhagen Business School, Department of Economics.
  • Handle: RePEc:hhs:cbsnow:2003_001

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    References listed on IDEAS

    1. Dionne, Georges & Doherty, Neil A, 1994. "Adverse Selection, Commitment, and Renegotiation: Extension to and Evidence from Insurance Markets," Journal of Political Economy, University of Chicago Press, vol. 102(2), pages 209-235, April.
    2. Parigi, Bruno M., 1994. "Self selection in a dynamic credit model," European Journal of Political Economy, Elsevier, vol. 10(3), pages 571-590, October.
    3. Szpiro, George G, 1986. "Measuring Risk Aversion: An Alternative Approach," The Review of Economics and Statistics, MIT Press, vol. 68(1), pages 156-159, February.
    4. Asheim, Geir B. & Nilssen, Tore, 1996. "Non-discriminating renegotiation in a competitive insurance market," European Economic Review, Elsevier, vol. 40(9), pages 1717-1736, December.
    5. Nilssen, Tore, 2000. "Consumer lock-in with asymmetric information," International Journal of Industrial Organization, Elsevier, vol. 18(4), pages 641-666, May.
    6. Joseph E. Stiglitz, 1977. "Monopoly, Non-linear Pricing and Imperfect Information: The Insurance Market," Review of Economic Studies, Oxford University Press, vol. 44(3), pages 407-430.
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    Cited by:

    1. Jobst, Andreas A., 2002. "The Pricing puzzle: The default term structure of collateralised loan obligations," CFS Working Paper Series 2002/14, Center for Financial Studies (CFS).
    2. Andreas Jobst, 2002. "Loan Securitisation: Default Term Structure and Asset Pricing Based on Loss Prioritisation," FMG Discussion Papers dp422, Financial Markets Group.

    More about this item


    Insurance; Insurance Companies; Transactional relationships; Reputation;

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G22 - Financial Economics - - Financial Institutions and Services - - - Insurance; Insurance Companies; Actuarial Studies
    • L14 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Transactional Relationships; Contracts and Reputation

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