[1] Bocconi Univ, Dept Management & Technol, Via Roentgen 1, I-20136 Milan, Italy
[2] Bocconi Univ, CBIOS, Via Roentgen 1, I-20136 Milan, Italy
[3] IESEG Sch Management, LEM CNRS 9221, Management Dept, Socle Grande Arche, 1 Parvis La Def, F-92044 Paris, La Defense, France