In several papers, Negishi revisted the foundations of competitition. Sensitive to the Edgeworthian views of exchange but strongly influenced by the law of indifference of Jevons, he tried to reconcile both approaches. The main result of this synthesis is the equivalence between the walrasian...

This note analyzes some properties of optional two-part pricing in a two-type economy. First, the optimal contracts along the Paretian frontier are described. Then, the duality relation between the Rawlsian program and the discriminating monopoly is demonstrated. Last, this property is used to...

In a partial equilibrium framework, SHARKEY and SIBLEY [1993] show paradoxally that all redistributive optimal two-part pricings are sustainable. They also suggest the extension of their main result to non-linear pricing. In this paper, it is shown that in fact their result doesn't extend...

Les économies des pays en développement sont à la fois caractérisée par une faiblesse de l’infrastructure financière, notamment du cadre légal, et un développement important de la finance informelle. L’imperfection du cadre légal limite considérablement l'efficacité des...

Developing countries economies are well-known for both the inadequacy of the institutional framework (this is particularly relevant for the legal system) and the presence of informal nancing. The former characteristic signi cantly reduces the e¢ ciency of con- tractual mechanisms. As a result,...

The age structure of the French population has been experiencing dramatic changes over the past decades and is likely to do so in a near future. The increasing proportion of elder people may modify the saving behaviour of French households. The level of saving, as well as its composition, may be...

Notre communication se propose d’expliciter les comportements de détention de produits d’assurance vie selon l’âge, à partir d’une exploitation économétrique de l’enquête Patrimoine 1998 de l’Insee. Plus précisément, nous cherchons à identifier les déterminants...

This paper studies a very thorough e-trading data base, including all of the bid/ask orders and daily portfolio values of more than 600 on-line amateur traders in the Paris Stock market focusing on the stormy period covering 2007-2009. Traders also participate in a monthly contest and can win...