This paper presents a discrete time version of the Romer 1986 model of endogenous growth. The purpose of this work is to propose detailed and simple proofs of existence of optimal solutions and of a competitive equilibrium. The framework implemented here reduces the complexity of the proofs...

We study the differentiability of order k greater than or equal to 1 of optimal trajectories of dynamic economic models with respect various parameters like initial stock, discount rate, ... We use the framework of Babach spaces of sequences and we use Differential Calculus on operators between...

In this paper we propose a unifying approach to study optimal growth models with bounded or unbounded returns. We prove existence of optimal solutions. We prove also, without using contraction method, that the value function is the unique solution to the Bellman equation in some classes of...

It is argued that the large debate which had organised in the recent period about the nature of returns to scale and the associated area of local indeterminacies within competitive economies was misplaced as soon as the environment encompassed more than one good. This is established through the...

L'interdependance des economies est etudiee dans un modele de croissance a deux pays avec horizon infini et prevision parfaite. La dynamique du modele en particulier la repartition de la consommation entre les pays et l'evolution de la dette exterieure explicitees.

This paper develops a two-sector overlapping generations model in which one sector produces an externality on the environmental quality and the other has no effect. We assume that environmental quality degradation results from production activity of one sector. Then, we characterize the...

La critique d'ad hocite est courante en economie, mais elle reste confuse, reposant aussi bien sur des arguments d'ordre heuristique (fondements microéconomiques), que sur des arguments d'ordre empirique (ajustement d'une theorie aux faits). Si l'epistemologie d'inspiration popperienne fournit...

This contribution raises the importance of factors substitutability in multi-sectoral economies. The argument is developed within a basic environment with two goods and two inputs and is based upon a close articulation between the features of the frontier of the production possibility set and...

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...

Cet article se propose d'examiner de maniere detaillee les productivites du travail au niveau sectoriel et agrege pour les regions francaises sur la decennie 80. Empruntant aux travaux inities par Baumol, suivis par Barro et Sala-i-Martin notamment, elle enrichit ces derniers en mettant l'accent...