Affiliation: | (1) GERAD/Faculty of Management, McGill University, 1001, Sherbrooke West, Montreal, Que., H3A 1G5, Canada (e-mail: ma56@musica.mcgill.ca), CA;(2) LOGILAB/Management Studies, University of Geneva, 102, Bd Carl-Vogt, CH-1211 Genève 4, Switzerland (e-mail: jpvial@uni2a.unige.ch), CH |