Bayes' statistical rule remains the status quo for modeling belief updating in both normative and descriptive models of behavior under uncertainty. Recent research has questioned the use of Bayes' rule in descriptive models of behavior, presenting evidence that people overweight 'good news'...

We consider social decisions under uncertainty. We show that the ex ante social preference order satisfies a Pareto axiom with respect to ex ante individual preferences, along with an axiom of Statewise Dominance, if and only if all agents admit subjective expected utility (SEU) representations,...

The problem of how to rationally aggregate probability measures occurs in particular (i) when a group of agents, each holding probabilistic beliefs, needs to rationalise a collective decision on the basis of a single 'aggregate belief system' and (ii) when an individual whose belief system is...

We consider collective decisions under uncertainty, when agents have "generalized Hurwicz" preferences, a broad class allowing many different ambiguity attitudes, including subjective expected utility preferences. We consider sequences of acts that are “almost-objectively uncertain” in the...

Optimal voting rules have to be tailored to the underlying distribution of preferences. This paper shows that the introduction of a stage at which agents may themselves choose voting rules according to which they decide in a second stage may increase the sum of individuals' payoffs if players...

How should we aggregate the ex ante preferences of Bayesian agents with heterogeneous beliefs? Suppose the state of the world is described by a random process that unfolds over time. Different agents have different beliefs about the probabilistic laws governing this process. As new information...

The paper explores the Nash’ equilibrium point and the “Non Cooperative Games Theory” for extension of bargaining solution analyses, applied in the local development field. Social trust and social cohesion conditions (sensitization process) within the Community develop the necessity of...