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.

The purpose of this paper is to examine how the Solow residual relates to innovation at the firm level. We estimate two kinds of relationships. The first relationship explains innovation output from innovation inputs. The second relationship relates TFP growth to innovation output.

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...

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 studies the link between productivity, innovation and research and development investments at the firm level. We introduce three new features: (i) A structural model that explains productivity by innovation output, and innovation output by research and development investments; (ii)...

The main objective of this paper is to analyze the links between product market competition, innovation and growth. We capture the idea that firms innovate in order to try to escape - albeit temporarily - from the pressure of competition exerted on them by their rivals. At each date, an industry...

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 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...

Deux faits stylises majeurs ont ete mis en evidence en Economie geographique. D'une part, la croissance economique s'accompagne d'une augmentation des inegalites regionales au sein d'un pays. D'autre part, les externalites technologiques restent localisees dans l'espace. Cet article s'attache,...