Université Paris Ouest Nanterre La Défense and EconomiX – CNRS; postal address: Maison Max Weber, Avenue de la République, F-92001 Nanterre Cedex, France: email@example.com. Université de Reims Champagne Ardenne and EconomiX-Cachan CNRS. Postal address: Université de Reims Champagne Ardenne; Faculté des Sciences Economiques et de Gestion; 57 bis, rue Pierre Taittinger, F-51096 Reims Cedex, France: firstname.lastname@example.org.
A first version of this paper was presented at the ESHET conference (Porto 2006), HES conference (Grinnell 2006), the First Italian–French workshop in Law and Economics (Alessandria 2006), a H2S seminar at the University of Paris X (April 2007), and at the Erfurt European Workshop in Law and Economics (April 2007). We thank the participants for their remarks. We also thank Roger Backhouse, Philippe Fontaine, Carla Marchese, Steve Medema, and Warren Samuels for comments. The article has benefited from discussions with Richard A. Posner. We thank him for his help. We also thank Carol Bauer for her help. The research for this paper was supported by different grants from the French Agence Nationale de la Recherche and from the French Ministry of Foreign Affairs. Alain Marciano also acknowledges the support of the ICER and of the Dipartimiento d'Economia of the Università degli Studi di Torino.