1. Faculty of Business Administration, Van Lang University, Ho Chi Minh City, Vietnam
2. College of Economics, Law and Government, University of Economics Ho Chi Minh City, Ho Chi Minh City, Vietnam
3. Departament d’Economia Aplicada, Universitat Autònoma de Barcelona, Barcelona, Spain
4. Departament d’Economia Aplicada, Institute for the Study of Labor (IZA), Bonn, Germany