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Prix du risque et rationalité

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  • Bertrand Munier

Abstract

[eng] Price of risk and rationality . The price of risk is a notion which people often perceive as a vague one. Yet, the relevant concept is a very precise one, which the theory of rational decision making has developed for a quarter of a century, as this survey article recalls. Economic theory as well as financial theory suggest evaluating techniques of risky projects which are consistent between themselves and are consistent too with the price of risk concept. Opposite opinions emerge now and then, but contain errors, as the article argues and explains in the light of recent results of specialized research. Nevertheless, practical as well as theoretical considerations have lead to generalizations of those concepts based on experimental research on rationality under risk and on the development of markets, in particular of financial markets. The aim of this article is to present such generalizations without rejecting the bulk of theoretical achievements in this domain. [fre] Le prix du risque est une notion parfois perçue comme vague. Pourtant, il s'agit d'un concept très précis, développé depuis un quart de siècle par la théorie de la décision rationnelle, comme le rappelle cet article de synthèse. La théorie économique de la valeur comme la théorie financière proposent des techniques d'évaluation de projets risqués qui sont cohérentes entre elles et cohérentes avec la notion de prix du risque. Les opinions développées çà et là en sens contraire contiennent des erreurs que l'article relève et explique, à la lumière de résultats récents de la recherche spécialisée. En revanche, des considérations aussi bien pratiques que théoriques ont conduit à une généralisation de ces concepts à partir des résultats expérimentaux en matière de rationalité face au risque et du développement des marchés, notamment des marchés financiers. Le but de l'article est d'exposer ces généralisations sans pour autant rejeter l'essentiel des acquis théoriques dans le domaine.

Suggested Citation

  • Bertrand Munier, 1996. "Prix du risque et rationalité," Revue d'Économie Financière, Programme National Persée, vol. 37(2), pages 31-58.
  • Handle: RePEc:prs:recofi:ecofi_0987-3368_1996_num_37_2_2265
    DOI: 10.3406/ecofi.1996.2265
    Note: DOI:10.3406/ecofi.1996.2265
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