1. Department of Business Economics; Universidad Carlos III; Getafe (Madrid) Spain
2. International Business and Strategy Department; D'Amore-McKim School of Business, Northeastern University; Boston Massachusetts U.S.A
3. Department of Strategy and General Management; ESADE Business School, Ramon Llull University; Barcelona Spain
4. Departament d'Economia de l'Empresa; Universitat de les Illes Balears; Mallorca Spain