What is the social value of innovations in Schumpeterian growth models? This issue is tackled by introducing the concept of Lindahl equilibrium in a standard endogenous growth model with vertical innovations which is extended by explicitly considering knowledge diffusion. Assuming that knowledge...

[fre] Boîte d'Edgeworth et théorie de la localisation. . L'introduction de l'espace dans la théorie économique soulève des difficultés particulières qui expliquent la construction de modèles spécifiques : la non-convexité des choix de localisation et la présence d'une infinité de...

[eng] This paper studies the relationship between continuous and discrete models in urban economics. In particular, it discusses the interpretation of the continuous model as well as its « discrete foundations ». [fre] L'objectif de cet article est de faire un tour d'horizon sur les liens qui...

[eng] The monopolistic competition model and banking theory. . We show that the Salop [1979] monopolistic competition model can reveal very useful in banking theory. We first recall several of its recent applications to the modeling of competition between bank branches (Chiappori et ali [1992],...

[eng] Spatial equilibrium and neighbourhood effects :. A generalization of the analysis of the bidimensional case. andré grimaud. Most urban economics rnodels are based on the hypothesis that there exists a Central Business District toward luhicli ail the displacements in the city are made....

This paper examines the implications of an environmental policy for growth performances. We develop a model where growth is driven by human capital accumulation. Firms invest in research to develop new technologies to reduce their pollution emissions and education is treated as product which not...

This paper exploits the formalization of a circular product differentiation model of Salop (1979) to propose an endogenous growth quality ladder model in which the knowledge inherent in a given sector can spread variously across the sectors of the economy, ranging from local to global influence....

We show how the exhaustion constraint of non renewable resources, against which maintaining a minimum level of consumption may collapse in the long run, could be relaxed by an appropriate effort in R?D. However along any optimal trajectory of the economy, this effort has to be made if and only...

In this paper, we combine together elements from the literature on endogenous growth and on funding of innovations developed by authors such as Arrow [1962], Tirole [1988], Scotchmer [1991,1999], Dasgupta et al. [1996], Gallini and Scotchmer [2003]. We shed a new light on several questions often...