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Substituabilité entre assurance et auto-assurance : une propriété robuste à l’asymétrie d’information et à l’ambiguïté

Author

Listed:
  • Marielle Brunette

    (BETA - Bureau d'Économie Théorique et Appliquée - AgroParisTech - UNISTRA - Université de Strasbourg - Université de Haute-Alsace (UHA) - Université de Haute-Alsace (UHA) Mulhouse - Colmar - UL - Université de Lorraine - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CEC - Chaire Economie du Climat - Université Paris Dauphine-PSL - PSL - Université Paris Sciences et Lettres)

  • Anne Corcos

    (CURAPP-ESS - Centre universitaire de recherches sur l'action publique et le politique. Epistémologie et Sciences sociales - UMR CNRS UPJV 7319 - UPJV - Université de Picardie Jules Verne - CNRS - Centre National de la Recherche Scientifique)

  • Stéphane Couture

    (MIAT INRAE - Unité de Mathématiques et Informatique Appliquées de Toulouse - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

  • François Pannequin

    (CREST - Centre de Recherche en Économie et Statistique - ENSAI - Ecole Nationale de la Statistique et de l'Analyse de l'Information [Bruz] - X - École polytechnique - IP Paris - Institut Polytechnique de Paris - ENSAE Paris - École Nationale de la Statistique et de l'Administration Économique - CNRS - Centre National de la Recherche Scientifique, ENS Paris Saclay - Ecole Normale Supérieure Paris-Saclay)

Abstract

We study the effect of asymmetric information about self-insurance effort on the substitution property between insurance and self-insurance. We first examine the effect of the insurer's ability to observe the policyholder's self-insurance effort in a risk context. We then extend the analysis to a unilateral ambiguous context where only the policyholder has an ambiguous knowledge of his risk exposure. We find that information on the level of effort has a strategic dimension neither in the risk context nor in the ambiguous one: policyholders choose identical levels of effort, be the effort observable or not. As a result, the substitutability property between insurance and self-insurance is robust to both asymmetric information and ambiguity. The implications for government and insurers are discussed.

Suggested Citation

  • Marielle Brunette & Anne Corcos & Stéphane Couture & François Pannequin, 2020. "Substituabilité entre assurance et auto-assurance : une propriété robuste à l’asymétrie d’information et à l’ambiguïté," Post-Print hal-04174315, HAL.
    • Handle: RePEc:hal:journl:hal-04174315
    DOI: 10.3917/redp.304.0111
    as

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