We consider a general equilibrium model with a production sector. The consumption sets, the preferences of the consumers and the production possibilities are represented by set-valued mappings to take into account the possibility of external effects. There are no convexity assumptions on the...

The purpose of this note is to build an ethical inequality index which explicitely takes into account the social attitude towards inequlaity, through the actual tax scheme. We give a rough empirical application of this subjective inequality index to the evolution of wage inequality in France...

The aim of this paper is to study the relationship between advertising and sales of French manufacturing firms. First, we use a simple theoretical model compatible with past econometric studies of sales and advertising, and extend it to dynamics. We show that the models that do not account for...

We establish, in infinite dimensional Banach space, a nonconvex separation property for general closed sets that is an extension of Hahn-Banach separation theorem. We provide some consequences in optimization, in particular the existence of singular multipliers and show the relation of our...