Product diversity is a long-debated issue in economics. We remind that mainly two questions have been given answers : (a) To which extent does the market provide diversity ? (b) Why should this diversity be promoted ? The first one stands out as the core of most articles on product diversity,...

We propose a general model of monopolistic competition and derive a complete characterization of the market equilibrium using the concept of Relative Love for Variety. When the RLV increases with individual consumption, the market generates pro-competitive effects. When it decreases, the market...

This paper analyzes anti¬dumping (AD) policies in a two-country model with heterogeneous firms. One country enforces AD so harshly that firms exporting to the country choose not to dump. In the short run, the country enforcing AD experiences reduced com¬petition to the benefit of local firm...

This paper explores the consequences of introducing a monopolistic competition in an intertemporal two-sector small open economy model which produces traded and non traded goods. It is assumed that the non traded sector is the locus of the imperfectly competition. Our analysis shows that markup...

Our earlier papers had extend to asymmetric information the classical existence theorems of general equilibrium theory, under the standard assumption that agents had perfect foresights, that is, they knew, ex ante, which price would prevail on each spot market. Common observation suggests,...

Our earlier papers had extended to asymmetric information some classical existence theorems of general equilibrium theory, under the standard assumption that agents had perfect foresights, that is, they knew at the outset which price would prevail tomorrow on each spot market. Yet, observation...

Focussing on their analysis of the optimal public goods provision problem, this paper follows the parallel development of equilibrium models and mechanism design after the accommodation of Samuelson's definition of collective goods to the general equilibrium framework. Both paradigms lead to the...

My paper examines how Lange integrated the Walrasian and the Keynesian ingredients in his research. I argue that his works proposed two kinds of macroeconomics. The first kind was IS-LM, but IS-LM interpreted as an aggregate version of Walras' general equilibrium model (Lange, 1938). The second...

Abstract This article studies a new class of models which synthesize the two traditions of general equilibrium with nonclearing markets and imperfect competition on the one hand, and dynamic stochastic general equilibrium (DSGE) models on the other hand. This line of models has become a central...

On démontre la stabilité de l'équilibre dans une économie walrasienne complètement décentralisée dans laquelle les prix sont fixés par les agents économiques et où échange et production ont lieu hors équilibre.