: La Prehistoire: Problemes et Tendances . Centre National de La Recherche Scientifique.

Centre National De La Recherche

ECOLE POLYTECHNIQUE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Tax avoidance and the political appeal of progressivity

Empiriquement, on observe que la majorité des Etats a fait le choix d'un système d'imposition progressif. Pourtant, le fondement théorique de ce choix n'est pas évident. Si l'on interprète le système d'imposition appliquée comme le résultat d'un jeu entre deux partis politiques Downsiens, le fait que la majorité de la population soit relativement pauvre permet de conforter l'observation empiriq...

ECOLE POLYTECHNIQUE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Horizontal differentiation and price competition with sequential entry

We study a class of differentiation games à la Hotelling. Two firms choose a price and a location in the consumers' space. The leader first chooses both variables, and the follower observes them before playing. It is shown that in such games, any equilibrium has the property that the follower always gets a greater profit (in the absence of entry barrier). An equilibrium is shown to always exist...

ECOLE POLYTECHNIQUE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE A Concept of Progress for Normative Economics

The paper discusses the sense in which the changes undergone by normative economics in the 20th century can be said to be progressive. A simple criterion is proposed to decide whether a sequence of normative theories is progressive. This criterion is put to use on the historical transition from the new welfare economics to social choice theory. The paper reconstructs this classic case, and even...

Séro-agglutination rapide et macroscopique pour la recherche d'anticorps de la Fièvre Q. chez les animaux