1. IES Francisco Ayala, Avenida Francisco Ayala, s/n, Granada 18014, Spain
2. Department of Economic Analysis and Finance, University of Castilla-La Mancha, Cobertizo San Pedro Mártir s/n, Toledo 45071, Spain
3. Department of Financial Economics and Accounting, Universidad Pablo de Olavide, Ctra. de Utrera, Km. 1, Sevilla 41013, Spain