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Aversion au risque et prudence : le cas d'un risque de taux d'intérêt

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  • Éric Langlais

Abstract

[fre] Cet article analyse le motif d'épargne de précaution en présence d'un risque de taux d'intérêt, de façon à compléter les résultats de Kimball [1990] dans le cas du risque de revenu. En statique comparative, la condition sur la courbure de l'utilité marginale de la consommation n'est même plus suffisante pour déterminer le sens de l'ajustement de l'épargne avec le risque de taux d'intérêt, alors qu'elle est nécessaire et suffisante pour un risque de revenu. Nous proposons alors une généralisation du concept de prudence de Kimball, et définissons la prime de pru­dence pour risque de taux d'intérêt. [eng] This paper deals with the precautionary saving motive in the face of interest rate uncer­tainty, in order to complete the results exhibited by Kimball [1990] for income risk. In comparative statics, the condition on the curvature of marginal utility is a no more/suffi­cient condition to give the adjustment of saving with interest rate uncertainty, although! it is a necessary and sufficient condition for a risky income. We propose a general defini­tion for the concept of prudence introduced by Kimball, and define a precautionary pre­mium for risky interest rate.

Suggested Citation

  • Éric Langlais, 1995. "Aversion au risque et prudence : le cas d'un risque de taux d'intérêt," Revue Économique, Programme National Persée, vol. 46(4), pages 1099-1119.
  • Handle: RePEc:prs:reveco:reco_0035-2764_1995_num_46_4_409724
    DOI: 10.3406/reco.1995.409724
    Note: DOI:10.3406/reco.1995.409724
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