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What if compulsory insurance triggered self-insurance? An experimental evidence

Author

Listed:
  • François Pannequin

    (CREST - Centre de Recherche en Économie et Statistique - ENSAI - Ecole Nationale de la Statistique et de l'Analyse de l'Information [Bruz] - GENES - Groupe des Écoles Nationales d'Économie et Statistique - X - École polytechnique - IP Paris - Institut Polytechnique de Paris - ENSAE Paris - École Nationale de la Statistique et de l'Administration Économique - GENES - Groupe des Écoles Nationales d'Économie et Statistique - IP Paris - Institut Polytechnique de Paris - CNRS - Centre National de la Recherche Scientifique)

  • Anne Corcos

    (LEFMI - Laboratoire d’Économie, Finance, Management et Innovation - UR UPJV 4286 - UPJV - Université de Picardie Jules Verne)

  • Claude Montmarquette

    (CIRANO - Centre interuniversitaire de recherche en analyse des organisations [Montréal, Canada] = Center for Interuniversity Research and Analysis on Organizations [Montréal, Canada])

Abstract

Although compulsory insurance mitigates the negative externalities caused by uninsured individuals, it raises the issue of insurance crowding out prevention. However, at the theoretical level, compulsory insurance and self-insurance (preventive investments dedicated to loss reduction) are know to be substitutes for risk averters but complements for risk lovers. This paper aims to empirically test these opposite predictions through a laboratory experiment using a model-based design. Our experimental results confirm the theoretical predictions: compulsory insurance and self-insurance are complements for risk lovers and substitutes for risk averters. This study strongly supports public policies advocating mandatory insurance implementation as they enhance risk lovers' self-insurance investments. Therefore, a risk management scheme combining voluntary top-up and compulsory partial insurance guarantees an optimal risk allocation for risk-averters and increases the investments in self-insurance for risk-lovers.

Suggested Citation

  • François Pannequin & Anne Corcos & Claude Montmarquette, 2025. "What if compulsory insurance triggered self-insurance? An experimental evidence," Post-Print hal-05311310, HAL.
    • Handle: RePEc:hal:journl:hal-05311310
    DOI: 10.1017/esa.2025.10022
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    References listed on IDEAS

    as
    1. Mol, Jantsje M. & Botzen, W. J. Wouter & Blasch, Julia E., 2020. "Risk reduction in compulsory disaster insurance: Experimental evidence on moral hazard and financial incentives," Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), Elsevier, vol. 84(C).
    2. W. J. Wouter Botzen & Howard Kunreuther & Erwann Michel-Kerjan, 2019. "Protecting against disaster risks: Why insurance and prevention may be complements," Journal of Risk and Uncertainty, Springer, vol. 59(2), pages 151-169, October.
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