We give in this paper a formal definition of the concept of weak and strong a-polarization. We give necessary and sufficient conditions for a decision maker who respects the Lorenz order and who behaves in accordance with the expected utility model, with Yaari's dual model or with the...

In a multiperiod economy with incomplete markets and assets that exhibit a payoff depending on price history, we show that one need not perturb back office and settlement feature of assets to get endowment generic existence of an equilibrium. We exhibit a class of assets -transverse assets - and...

La theorie des cycles reels a pris le contre-pied de la macroeconomie keynisienne traditionnelle. Les fluctuations de l'emploi et du salaire reel pourraient etre le resultat d'un ajustement de l'offre de travail grace a une parfaite flexibilite du salaire aux variations de la demande de travail...

Ce document de travail propose une introduction analytique a la lecture des théories du systeme mondial capitaliste. Une premiere partie explique les liaisons existant entre l'oeuvre de Marx et ces theories. Les trois parties suivantes sont consacrees aux apports respectifs de Samir Amin,...

In a first time we draw a rough shape of a general formal framework for polynomial approximation theory which encompasses the existing one by allowing the expression of new types of results. We show how this framework incorporates all the existing approximation results and, moreover, how new...

Cet article a pour but de demontrer la viabilite des politique de taxation du capital dans une economie mondiale a deux pays avec imparfaite substituabilite des capitaux. Les agents sont altruistes et donnent une partie de leur patrimoine a leurs enfants. La presence d'une contrainte sur les...

This article intends to study the potential benefit of moving from a flexible exchange rate regime to a monetary union. To this end, we develop a two countries intertemporal general equilibrium model. We extend the Obstfeld and Rogoff [1995a] specification by introducing both physical capital...

In this survey article, we report results on the existence of pure-strategy Nash equilibria in games with an atomless continuum of players, each with an action set that is not necessarily finite. We also discuss purification and symmetrization of mixed-strategy Nash equilibria, and settings in...