Nathalie Moureau is a senior lecturer at the University of Montpellier-III and a member of Lameta, University of Montpellier-I. She is the author of Analyse économique de la valeur des biens d’art (Economica, 2000). Dominique Sagot-Duvauroux is a lecturer at the University of Angers and head of the GEAPE, UPRES EA n° 3146. In the «Repères» series Nathalie Moureau is the author, with Dorothée Rivaud-Danset of L’Incertitude dans les théories économiques (2004), and Dominique Sagot-Duvauroux, of L’Économie des fusions et acquisitions (2003) in coll. with Nathalie Coutinet.