1. Universidad Espíritu Santo , ESAI Business School , Guayaquil , Ecuador
2. Universidad Catolica del Norte , Department of Economics , Av. Angamos 0610 , 1270709, Antofagasta , Chile
3. Universidad Nacional de Loja , Department of Economics , Av. Pio Jaramillo Alvarado , Loja , 110103, Ecuador
4. University of Padua , Department of Industrial Engineering , Padova , Italy