We study efficiency properties of allocations and equilibria in dynamic stochastic economies with finitely lived agents. Efficiency is assessed to the concept of interim optimality which considers the agents' welfare at their birth date in every possible circumstance which may occur at that...

This paper studies optimality in dynamic stochastic economies with finitely lived agents. In this set up, an agent's utility level depends on the date at which it is evaluated, and on the available information at that date. A family of Pareto optimality concepts may be defined accordingly, with...

Un large debat s'est ouvert dans les pays occidentaux pour modifier les systemes de retraite bases sur la repartition. Gravement touches par l'evolution demographique, certains leur imputent aussi des effets distortionnaires sur l'offre de travail et une desincitation a l'epargne des menages...

We consider a Society which as to make a finite dimensional collective decision, and study the "stability" of the public arrangements made in the Society when considering the threats that potential coalitions may generate. We refer for that to the standard cooperative approach based on the...