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Demande d'assurance : Faut-il abandonner le critère de l'espérance d'utilité ?

Author

Listed:
  • Karine Darjinoff

    (TEAM - Université Paris 1, CREST)

  • Francois Pannequin

    (GRID, ENS Cachan)

Abstract
This paper presents a reflection on the expected utility model. The aim is to assess this criteria according to this ability to predict insurance behavior, with experiments and real observations. Four main facts are: the predominance of deductible insurance policy on the market, economic development and insurance, the choice between complete insurance and retention, and the perception of risk. We present the predictions of expected utility theory and several results are presented. Thus, some experimental and real results do not respect the predictions. (1) Insurance seem to be a normal good. (2) Subjects have diverse attitudes: subjects who are risk-averse in one situation become risk-seeking in another, and vice-versa (Slovic et al., 1979). (3) They prefer externe insurance policies (Schoemaker and Kunreuther, 1979). (4) Transformation effects in the loos distribution are generally consistent with the theoretical work of Eeckhoudt, Gollier and Schlesinger (1991). However, if there is a mean-preserving transformation (an increase in risk) affecting only portions of the loss distribution above the deductible, then some people change their optimal deductible (Brandao, 1994). (5) Expected utility theory with a concave utility function implies that probabilistic insurance must be preferred to regular insurance, but the majority of subjects reject probabilistic insurance (Kahneman et Tversky, 1979). (6) Subjects are sensitive to the context of decision (distorted in their perceptions of risk and framing effects), subjects overweight low probabilities, and underweight high ones. Furthermore, subjects' pricing decisions are sensitive to ambiguity, and aversion to ambiguity decreases as the probabilities of loss increases, there is a preference for ambiguity for high probabilities (Hogarth and Kunreuther, 1989). We show that belief, perceptions, and judgements must be taken into account in individual-decision making, and further research must determine which theory better explains observed behavior. If experimental studies, stemming from literature, generally call the normative theory into question, they omit to assess the main result of the theory of insurance demand: optimality of deductible insurance contracts. An original test let remove this insufficiency; these experimental results are not completely consistent with the EU model's predictions

Suggested Citation

  • Karine Darjinoff & Francois Pannequin, 2000. "Demande d'assurance : Faut-il abandonner le critère de l'espérance d'utilité ?," Cahiers de la Maison des Sciences Economiques bla00004, Université Panthéon-Sorbonne (Paris 1).
    • Handle: RePEc:mse:wpsorb:bla00004
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    References listed on IDEAS

    as
    1. Kunreuther, Howard & Hogarth, Robin & Meszaros, Jacqueline, 1993. "Insurer Ambiguity and Maarket Failure," Journal of Risk and Uncertainty, Springer, vol. 7(1), pages 71-87, August.
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    More about this item

    Keywords

    Insurance; Risk; Expected Utility; Context effect;
    All these keywords.

    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty

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