Marie-Laure Allain, Department of Economics, Ecole polytechique, CNRS, CREST-LEI, Claire Chambolle, INRA and Laboratoire d’Econométrie de l’Ecole Polytechnique, Thibaud Vergé, ENSAE, CREST-LEI.

Presentation at the conference organized by the Innovation & Regulation in Digital Services Chair, Paris, February 2 , 2009, on « Producers and distributors: can regulation of retail help for better regulation of the Internet ».