This paper studies the development of outsourcing behaviour of industrial French enterprises between 1984 and 2000. The database is the enterprises annual survey which deals with individual data about French enterprises. The «make or buy» behaviour is of great concern in the theoretical...

This arrticle analyzes the determinants of voluntary contribution to environmental quality by introducing the perception of the environmental risk. The environmental quality is assumed uncertain and influenced by current quality and individuals' contributions. We consider individuals who are...

This article study the impact of risk perception on environmental policy. The environmental quality is uncertain and can be improved by voluntary contributions. We introduce then an heterogeneity in individuals' risk perceptions. In this context, the social optimum can be decentralized by tax...

In this paper, we deal with the basic two-period consumption saving problem where the first and second period consumption utility, respectively v is assumed to be concave as usually. Considering the usual assumption of identify of u and v, we show that prudence is fully characterized by the...