1. Department of Business Organization and Marketing, Faculty of Business Studies, University of Pablo de Olavide, Carretera Utrera, Km.1, 41013 Seville, Spain
2. Department of Business Organization, Faculty of Law and Business, University of Córdoba, Puerta Nueva s.n., 14071 Córdoba, Spain
3. Department of Economics, Quantitative Methods and Economic History, University of Pablo de Olavide, Carretera Utrera, Km.1, 41013 Seville, Spain