ED EPSInternational audienceThe aim of this paper is two-fold: first, to emphasize that the seminal result of Dow and Werlang (1992) remains valid under weaker conditions, and this even if non-positive prices are considered, or equally that the no-trade interval result is robust when considering assets which can yield non-positive outcomes. Second, to make precise the weak uncertainty aversion behavior characteristic of the existence of such an interval
Schmeidler [1986], [1989] a utilisé son célèbre modèle de probabilité non additive pour décrire l’aversion ou l’attraction d’un décideur pour l’incertain. Cette note montre comment les probabilités non additives peuvent aussi permettre d’obtenir une caractérisation simple du critère de Hurwicz, lorsque le décideur a une attitude intermédiaire vis-à-vis de l’incertitude, entre aversion et attraction totales.
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