Lorenzo Escot Applied Economics Department, Faculty of Statistical Studies, Complutense University of Madrid.   Avenida Puerta de Hierro, s/n Madrid, Madrid 28040 España   lescot@ucm.es   https://estudiosestadisticos.ucm.es/           JEL Areas: C4 : Econometric and Statistical Methods: Special Topics A2 : Economics Education and Teaching of Economics: General