A theory of incomplete preferences under uncertainty is proposed, according to which a decision maker's preferences are indeterminate if and only if her confidence in the relevant beliefs does not match up to the stakes involved in the decision. We use the model of confidence in beliefs...

One apparent reason for deferring a decision – abstaining from choosing, leaving the decision open to be taken by someone else, one’s later self, or nature – is for lack of sufficient confidence in the relevant beliefs. This paper develops an axiomatic theory of decision in situations...

This paper proposes and characterises a model of uncertainty averse preferences that can simultaneously accommodate three divergences from subjective expected utility: imprecision of beliefs (or ambiguity), imprecision of tastes (or multi utility), and state dependence of utility. Moreover, it...

We provide possibility results on the aggregation of beliefs and tastes for Monotone, Bernoullian and Archimedian preferences of Cerreia-Vioglio, Ghirardato, Maccheroni, Marinacci, and Siniscalchi (2011). We propose a new axiom, Unambiguous Pareto Dominance, which requires that if the...

We study portfolio allocation and characterize contracts issued by firms in the international financial market when investors exhibit ambiguity aversion and perceive ambiguity in assets issued in foreign locations. Increases in the variance of their risky production process cause firms to issue...

Les notions de point de référence et d’aversion aux pertes sont deux éléments essentiels de la prospect theory, qui constitue à ce jour la théorie la plus reconnue concernant la représentation de la prise de décision individuelle dans le risque. L’objectif de cet article est de...

In 2009, France will replace its income maintenance scheme, "revenu minimum d'insertion", by a new one, revenu de solidarité active, which will improve the beneficiaries'incentives to work. While some have claimed that the reform should lower the current age limit to get the benefit, i.e., 25...

The interpretations of the Waterloo campaign are numerous, diverse and constantly reworked, so they are part of history no less than the event itself. This article briefly reviews them before considering more carefully two selected interpreters, i.e., Clausewitz and Stendhal. It likens the...

Among the range of practices that bring personal assistance to people in firms, coaching is getting a growing popularity, even if the need for it and the way it is used remain unclear. In such a context, this study aims at understanding the reasons why associates of a leading consulting firm...