1. Econometrics at the Faculty of Economics and Business, Albacete, Spain
2. Department of Spanish and International Economy, Econometrics and History and Economic Institutions of the University of Castilla-La Mancha, Albacece, Spain
3. Department of Statistics and Operations Research, Business Organization and Applied Economics, Universidad de Córdoba, Cordoba, Spain
4. Department Agricultural Economics, Sociology, and Policy, Faculty of Economics and Business Sciences, Universidad de Córdoba, Cordoba, Spain