This paper is an empirical study of the effectiveness of patents against imitators based on French survey data. We use a multinomial ordered logit and regress patent effectiveness on qualitative and quantitative variables. We find that patent costs are not a significant limitation on patent...

We study a system of interacting renewal processes which is a model for neuronal activity. We show that the system prossesses an exponentially large number (with respect to the number of neurons in the network) of limiting configurations of the "firing neurons". These we call patterns....

On peut considerer que l'instance actuellement mise sur l'idee controversee d'employabilite s'inscrit dans un contexte ou les responsables politiques valorisent et souhaitent developper l'initiative des chomeurs, leurs efforts de formation et de recherche d'emploi. L'interrogation que fait...

In this paper we propose two exact algorithms for solving both two-staged and three-staged unconstrained (un) weighted cutting problems. The two-staged problem is solved by applying a dynamic programming procedure originally developed by Gilmore and Gomory [10]. The three-staged problem is...

Ce papier systimatise l'etude de l'existence d'un sentier de croissance optimale durable dans une economie dont les activites productives sont responsables d'emissions polluantes qui s'accumulent dans la nature et degradent le bien-etre des individus. Nous cherchons donc a identifier les...