1. Marketing Department, Audencia Business School, 44300 Nantes, France (e-mail: raffaele.filieri@audencia.com).
2. Department of Industrial Engineering, University of Parma, 43121 Parma, Italy (e-mail: francesco.galati@unipr.it).
3. Department of Management and Production Engineering, Politecnico di Torino, 10129 Turin, Italy (e-mail: elisabetta.raguseo@polito.it).