1. Decision Aid Research Group, School of Commerce and Administration, Faculty of Management; Laurentian University; Sudbury; Ontario; P3E 2C6; Canada
2. Rouen Business School; 1 rue du Maréchal Juin - BP 215, F-76825 Mont Saint Aignan Cedex; France
3. Department of Economics, Management and Quantitative Methods; University of Milan; Milan; 20122; Italy