1. Marketing and Market Research Department, Melilla Campus, Universidad of Granada, 52005 Melilla, Spain
2. Department of Economics and Social Sciences, Universitat Politècnica de València, 46022 Valencia, Spain
3. Department of Management, University of Bielsko-Biala, 43-309 Bielsko-Biala, Poland
4. EDEM: Centro Universitario Escuela de Empresarios, 46024 Valencia, Spain