This paper presents a discrete time version of the Romer 1986 model of endogenous growth. The purpose of this work is to propose detailed and simple proofs of existence of optimal solutions and of a competitive equilibrium. The framework implemented here reduces the complexity of the proofs...

Traditional trade models ignoring the dimension of product quality generally lead to excessively low trade price elasticities. In this paper, we show that higher estimated trade price elasticities, more in conformity with theory, can be obtained by controlling product quality in trade equations....

L'agglomeration spatiale des firmes est un phenomene tres connu de l'economie geographique. Cet article propose une nouvelle explication a ce phenomene : les entreprises mettent en avant la localisation comme le moyen de signaler la qualite de biens nouveaux. Accepter la concurrence en se...

Cet article a pour objet d'analyser les strategies de prix d'une firme en monopole sur son marche domestique et en duopole sur un autre marche europeen. Le produit est vendu par le biais d'un reseau de distribution exclusive dans les deux pays. La firme peut etre concurrencee sur son propre...

This paper follows recent research about the importance, the variety and the development of innovation in the service industries. We study the innovations which have appeared in the fast growing activity of mobile telecommunication services in France.

Information Technologies (IT) induce many innovations in service industries. Innovations in IT highlight the peculiarities of innovation in service industries compared to manufactured-goods industries. Because innovations often affect competitiveness, service-providers attach a high importance...

This paper aims to study whether a simple asymetric adjustment costs model with heterogeneity can account for French aggregate job flows.

L'objectif de cet article est de s'interroger sur les domaine pertinents des notions de confiance et de proximite appliquees aux descriptions des dynamiques de la R&D observees dans l'industrie pharmaceutique.

This paper is an empirical study of the effectiveness of patents against imitators based on French survey data. We use a multinomial ordered logit and regress patent effectiveness on qualitative and quantitative variables. We find that patent costs are not a significant limitation on patent...