The aim of this paper is to set the foundation of an approach of the diffusion-adoption problem of an innovation or a technological standard, based on the building of influence matrixes. This means that agents are to be considered as participating in social networks that provide the support and...

Apres avoir empiriquement mis en evidence l'instabilite des procedures CART de classification par arbre, nous presentons des methodes d'agregation de classificateurs obtenues a l'aide d'un reechantillonage de type bootstrap. Enfin, nous mettons en oeuvre ces procedures sur un probleme de...

Les strategies d'attractivite mises en oeuvre par les territoires pour attirer des investissements productifs en quete de localisation induisent une distinction entre deux types d'investissements selon leur origine, endogene ou non. Toute firme etant nee dans un contexte territorial donne,...

L'analyse des durees d'emploi conduit a s'interroger sur l'ajustment entre employeur et employe. Dans ce processus de selection dans l'emplopi se pose le probleme de l'existence d'une heterogeneite individuelle dont la non prise en compte est susceptible d'induire des biais d'estimation. Aussi,...

Bootstrap tests are tests for which the significance level is calculated by some sort of bootstrap procedure, which may be parametric or nonparametric. We provide a theoretical framework in which to study the size distorsions of bootstrap P values. We show that, in many circumstances, the size...

In this paper, new noncausality tests built on a general nonlinear framework are proposed and their performance studied by a Monte Carlo experiment and a variety of nonlinear artificial series. Two of these test are based on a Taylor expansion of the nonlinear model around a given point in a...

This note constructs a neoclassical growth model of endogenous intergenerational altruism along the lines of Mulligan (1997). It is shown that individuals accumulate altruism in the long run whenever the rate at which concern is accumulated is sufficiently high, and that the endogenous formation...

This paper constructs an overlapping generations model of pollution externality wherein individuals are altruistically linked to their offspring as in Barro (1974). It is shown that steady state consumption may be a decreasing function of the intergenerational degree of altruism. Despite...