Dans cet article, l’analyse des processus d’innovation, considérés comme des processus de création de technologie et caractérisés par l’existence de processus de production verticalement intégrés séparables, permet de reconsidérer la stratégie technologique des entreprises et...

This paper reconsiders the determination of asset returns in a model with Kreps-Porteus generalized isoelastic preferences where returns appear governed on the basis of Euler equations, by a combination of the two most common measures of risk -- covariance with the market return and covariance...

This paper analyses the efficiency and the equity motives that can justify regional policies. The market failure induced by localized technological spillovers entails too little agglomeration. However, coordination failures and the fact that firms do not take into account the welfare of immobile...

The paper endorses the thesis that current macro imbalances are partly due to an excess of household savings in China, whose origin is to be found among other things in household uncertainty about the provision of public services like health care, pensions and education. Focusing on health...

Les décisions du 17 août dernier ont marqué une rupture dans l'histoire de la transition russe. D'une part, l'abandon de la politique de "corridor", qui encadrait l'évolution du change depuis plusieurs années, signait la fin de la relative stabilité des prix obtenue depuis trois ans. De...

It is widely agreed that the natural unemployment rate recovered strongly in several OECD economies in the 1990s while not yet in the others. This paper draws on models by the authors endogenizing the path of the natural rate in order to trace the causes and apportion the credit. The results...

European policy makers may have asked too much from regional policies: to decrease inequalities between regions, to increase efficiency at the national and European levels and to decrease inequalities between countries. This paper argues that these policies face a trade-off between equity and...

Les années vingt constituent un laboratoire pour l'analyse des phénomènes monétaires. Sargent [1982] insiste sur le rôle de la crédibilité dans le succès de la politique économique. Dans un modèle centré sur le financement monétaire du déficit, la thèse selon laquelle les années...

Endogenous labor supply decisions are introduced in an equilibrium model of limited insurance against idiosyncratic shocks. Unlike in the standard case with exogenous labor (e.g. [Aiyagari, S.R., 1994. Uninsured idiosyncratic risk and aggregate saving. Quarterly Journal of Economics 109, 659–684;...

This paper examines how aversion to risk and aversion to intertemporal substitution determine the strength of the precautionary saving motive in a two-period model with Selden/Kreps-Porteus preferences. For small risks, we derive a measure of the strength of the precautionary saving motive which...