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On Bundling in Insurance Markets

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Abstract

This paper analyzes the welfare consequences of bundling different risks in one insurance contract in markets where adverse selection is important. This question is addressed in the context of a competitive insurance model a la Rothschild and Stiglitz (1976) with two sources of risk. Accordingly, there are four possible types of individuals and many incentive compatibility constraints to be considered. We show that the effect of bundling on these incentive compatibility constraints is such that bundling always yields a welfare improvement, and this result only holds when all four types have strictly positive shares in the population. Due to the competition between insurance companies, these benefits accrue to consumers who potentially have fewer contracts to choose from, but benefit from the better sorting possibilities due to bundling.

Suggested Citation

  • Maarten C. W. Janssen & Vladimir A. Karamychev, 2008. "On Bundling in Insurance Markets," Vienna Economics Papers vie0809, University of Vienna, Department of Economics.
    • Handle: RePEc:vie:viennp:vie0809
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    References listed on IDEAS

    as
    1. Michael Rothschild & Joseph Stiglitz, 1976. "Equilibrium in Competitive Insurance Markets: An Essay on the Economics of Imperfect Information," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 90(4), pages 629-649.
    2. Whinston, Michael D, 1990. "Tying, Foreclosure, and Exclusion," American Economic Review, American Economic Association, vol. 80(4), pages 837-859, September.
    3. William James Adams & Janet L. Yellen, 1976. "Commodity Bundling and the Burden of Monopoly," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 90(3), pages 475-498.
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    Cited by:

    1. Peng, Sheng-Chang & Li, Chu-Shiu, 2024. "Bundled insurance coverage and asymmetric information: Claim patterns of automobile theft insurance in Taiwan," Pacific-Basin Finance Journal, Elsevier, vol. 84(C).

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    More about this item

    JEL classification:

    • G22 - Financial Economics - - Financial Institutions and Services - - - Insurance; Insurance Companies; Actuarial Studies
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design

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