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Risk Mutualization and Competition in Insurance Market

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  • M.-C. Fagart
  • N. Fombaron
  • M. Jeleva

Abstract

The aim of this paper is to analyze the impact of mutual firms on competition in the insurance market. We distinguish two actors in this market: mutual firms, which belong to their pooled members, and traditional companies, which belong to their shareholders. Our approach differs from the literature by one crucial assumption: the expected utility of the consumers depends on the size of their insurance firm, which generates network externalities in this market. Thus, the choice of a contract results in a trade-off between the premium level and the probability of that premium being ex-post adjusted. The optimal contract offered by a mutual firm involves a systematic ex-post adjustment (negative or positive), while the contracts a company offers imply a fixed premium that is possibly negatively adjusted at the end of the contractual period. In an oligopoly game, we show that three types of configurations are possible at equilibrium: either one mutual firm or insurance company is active, or a mixed structure emerges in which two or more companies share the market with or without a mutual firm. The Geneva Papers on Risk and Insurance Theory (2002) 27, 115–141. doi:10.1023/A:1021948826240
(This abstract was borrowed from another version of this item.)
(This abstract was borrowed from another version of this item.)
(This abstract was borrowed from another version of this item.)

Suggested Citation

  • M.-C. Fagart & N. Fombaron & M. Jeleva, 2001. "Risk Mutualization and Competition in Insurance Market," THEMA Working Papers 2001-25, THEMA (THéorie Economique, Modélisation et Applications), Université de Cergy-Pontoise.
    • Handle: RePEc:ema:worpap:2001-25
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    References listed on IDEAS

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    1. Katz, Michael L & Shapiro, Carl, 1985. "Network Externalities, Competition, and Compatibility," American Economic Review, American Economic Association, vol. 75(3), pages 424-440, June.
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    Cited by:

    1. David Alary & Catherine Bobtcheff & Carole Haritchabalet, 2018. "Insurance pools for new and undiversifiable risk," Post-Print hal-02440928, HAL.
    2. Renaud Bourlès, 2006. "How Can Insurance Companies Compete With MutualInsurers? The Role of Commitment," Working Papers halshs-00410765, HAL.
    3. Dionne, Georges & Harrington, Scott, 2017. "Insurance and Insurance Markets," Working Papers 17-2, HEC Montreal, Canada Research Chair in Risk Management.
    4. Dionne, Georges & Fombaron, Nathalie & Doherty, Neil, 2012. "Adverse selection in insurance contracting," Working Papers 12-8, HEC Montreal, Canada Research Chair in Risk Management.
    5. Nathalie Fombaron & Georges Dionne & Wanda Mimra, 2023. "Adverse Sélection in Insurance," Post-Print hal-04416340, HAL.

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