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Risk Perception, Risk Attitude and Decision : a Rank-Dependent Approach

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  • Michèle Cohen

    (CES - Centre d'économie de la Sorbonne - UP1 - Université Paris 1 Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique, PSE - Paris School of Economics - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

Abstract

The classical expected utility model of decision under risk (von Neumann-Morgenstern, 1944) has been criticized from an experimental point of view (Allais' paradox) as well as for its restrictive lack of explanatory power. The Rank-Dependent Expected Utility model (RDU) model (Quiggin, 1982) attempts to answer some of these criticisms. The decision maker is characterized by two functions : a utility function on consequences measuring preferences over sure outcomes and a probability weighting function measuring the subjective weighting of probabilities. As we show and illustrate in this paper, this model allows for more diversified types of behavior : it is consistent with the behavior revealed by the Allais paradox ; the decision maker could dislike risk (prefer to any lottery its expectation) without necessarily avoiding any increase in risk ; diminishing marginal utility may coexists with "weak" risk seeking attitudes ; decision makers with the same utility function may differ in their choices between lotteries when they have different probability weighting functions ; furthemore, the same decision maker may have different, context-dependent, subjective beliefs on events.

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  • Michèle Cohen, 2008. "Risk Perception, Risk Attitude and Decision : a Rank-Dependent Approach," Post-Print halshs-00348810, HAL.
    • Handle: RePEc:hal:journl:halshs-00348810
    Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-00348810
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    References listed on IDEAS

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