This paper seeks to gain insights on the relationship between growth and unemployment when considering heterogeneous agents in terms of skills. We allow for the possibility of train- ing for unskilled employed workers and for the possibility of human capital depreciation for skilled unemployed...

This paper extends on French data the previous findings on US data: employment and wage growth have been more important in the lower and upper tail of the job quality distribution. The originality of the paper is to argue that the diffusion of ICT cannot explain alone the polarization at the...

The introduction of information and communication technologies over the past decades has fostered a process of internal workplace reorganization of firms who have tried to maximize their performance. Using a two stage optimal control technique, this paper provides analytical solutions to the...

This paper proposes a model in the spirit of Aghion and al. (2005) that relates the magnitude of the impact of competition on R&D to the cost of innovation. The effect of competition on R&D is an inverted U-shape. However, the shape is flatter and competition policy is therefore less relevant...

This paper exploits a unique panel of 59,000 French firms over 1990-2004 to investigate the interactions between R&D, advertising and the competitive environment.The empirical findings confirm the predictions of a dynamic model that complements results known in static frameworks. First, more...

Ce travail présente un panorama de la qualité de l'emploi peu qualifié en France aujourd'hui. Nous nous intéressons en particulier aux conditions de travail, d'emploi et de rémunérations des salariés les moins qualifiés et les moins rémunérés. Nous mettons tout d'abord en évidence...

We use a French firm-level data set containing 13,000 firms over the period 1993-2004 to analyze the relationship between credit constraints and firms' R&D behavior over the business cycle. Our main results can be summarized as follows: (i) the share of R&D investment over total investment is...

Ce travail présente un panorama de la qualité de l'emploi peu qualifié en France aujourd'hui. Nous nous intéressons en particulier aux conditions de travail, d'emploi et de rémunérations des salariés les moins qualifiés et les moins rémunérés. Nous mettons tout d'abord en évidence...