1. a Instituto de Impresa, Department of Operations and Technology Management , María de Molina 12-5, 28006 Madrid, Spain
2. b Arizona State University, W. P. Carey School of Business, Department of Supply Chain Management , Tempe, AZ 85287, USA
3. c Università di Modena e Reggio Emilia, Dipartimento di Ingegneria Meccanica e Civile , Via Vignolese, 9005/a, 91100 Modena, Italy