Affiliation: | DIRO and CRT, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal (Québec), Canada H3C 3J7; MAGI and GERAD, École Polytechnique-Montréal, C.P. 6079, Succursale Centre-ville, Montréal (Québec), Canada H3C 3A7; Department of Management Science, Fudan University, 220 Handan Road, Shanghai 20433, China |