1. Faculty of Social, Economic and Financial Sciences, Quevedo State Technical University, Quevedo 120304, Ecuador
2. Jefatura de Cultura Científica, Universidad de Guayaquil, Guayaquil 090616, Ecuador
3. Department of Business and Economics, University of Almería, 04120 Almería, Spain
4. Faculty of Economics and Business, Universidad Católica de Santiago de Guayaquil (UCSG), Guayaquil 090150, Ecuador
5. Faculty of Engineering Sciences, Quevedo State Technical University, Quevedo 120301, Ecuador
6. Department of Statistics and Operations Research, University Rey Juan Carlos, 28933 Madrid, Spain