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...

The paper shows that, when dealing with social justice, it is necessary but not sufficient to consider the social evaluator as placed behind a veil of ignorance. Then, her judgements are conform to the moral principle of universalisation and thus are impartial. But the way such judgements should...

[fre] Pour rendre compte du comportement rationnel d'ordre éthique, Harsanyi reprend la figure du spectateur impartial de Smith. Or, des différences significatives apparaissent, entre les deux auteurs, concernant le traitement du jugement moral. Chez Harsanyi, il s'agit d'un jugement...

We axiomatize in the Anscombe-Aumann setting a wide class of preferences called rank-dependent additive preferences that includes most known models of decision under uncertainty as well as state dependent versions of these models. We prove that aggregation is possible and necessarily linear if...

This paper presents an axiomatic model of decision making under uncertainty which incorporates objective but imprecise information. Information is assumed to take the form of a probability-possibility set, that is, a set P of probability measures on the state space. The decision maker is told...