Bubble solutions of rational expectations models are identified by extra components that arise in addition to market fundamentals. In general there still exist many equilibrium paths relying on a minimal set of state variables, i.e., along which the number of lags that influence the current...

Nous etudions le probleme de l'allocation optimale de protefeuille en presence d'une contrainte de garantie, lorsque l'investisseur n'a pas la possibilite de changer la constitution de son portefeuille entre la data initiale et la date terminale. Nous montrons comment les actifs derives doivent...

The aim of the article is to link the formation of influence networks with the long run coexistence of technologies. In the spirit of Plouraboue et al. (1998), we postulate that potential adopters of a technology are situated in a social network. In our model, initial relations are partly...

We consider an overlapping generations model to study the effect of the educational system on growth and on the optimal educational policies when individuals are altruistic. The teaching efficiency depends on the teacher to pupil ratio; given a number of teachers, the number of students has a...

This paper questions the link between the establishment of a common currency among several countries and the necessity of political coordination. It begins by discussing why conducting a single monetary policy is thought to be easier within a single political unit. It then proceeds to enquire...

Comparative statics in an Arrow-Radner incomplete market equilibrium model shows that some insights on agents' risk perception can be inferred from market prices. We call "precautionary savings" those savings which are invested in some riskless asset. The results are: precautionary savings...