Ceclilia Bermúdez Department of Economics - Universidad Nacional del Sur   San Andres 800 - Altos de Palihue Bahía Blanca, Buenos Aires 8000FTN Argentina   cbermudez@uns.edu.ar   https://orcid.org/0000-0001-5761-7974           JEL Areas: C5 : Econometric Modeling: General C : Mathematical and Quantitative Methods