1. Professor, Dept. of Applied Economics, Univ. of Oviedo, Asturias 33006, Spain (corresponding author). ORCID: .
2. Professor, Statistics Institute, College of Economics and Management Sciences, Univ. Austral of Chile, P.O. Box 567, Valdivia 5090000, Chile. ORCID: .
3. Assistant Professor, Dept. of Economy, Univ. Católica de Norte, P.O. Box 1680, Antofagasta 1240000, Chile.
4. Professor, Institute of Economics, College of Economics and Management Sciences, Univ. Austral of Chile, P.O. Box 567, Valdivia 5090000, Chile.
5. Professor, Dept. of Economics and Management Sciences, Univ. de Los Lagos, P.O. Box 933, Osorno 5290000, Chile. ORCID: .