Paul Belleflamme, Universite catholique de Louvain, CORE and Louvain School of Management, Belgium, Thomas Lambert, Universite catholique de Louvain, Louvain School of Management, Belgium, Armin Schwienbacher, Universite Lille Nord de France , SKEMA Business School (Universite Lille 2, Faculté de Finance)

Presentation at the conference of the  Innovation & Regulation in Digital Services Chair, Oct. 2012, in on « Economics of ICTs».