María C. Delgado lópez Loyola Andalusia University   C/ Energía Solar, 1. Edificio G Campus Palmas Altas Sevilla, Sevilla 41014 Spain   mcdelgado@uloyola.es   https://www.researchgate.net/profile/M_Delgado3           JEL Areas: C6 : Mathematical Methods and Programming: General D5 : General Equilibrium and Disequilibrium: General