1. CNRS Senior scientist at Toulouse School of Economics, University of Toulouse Capitole, and the Institute for Advanced Study in Toulouse , France
2. Centro de Estudios Economicos, El Colegio de México , Mexico City
3. Deputy Manager of Statistical Analysis at the General Directorate of Economic Research, Banco de Mexico , Mexico City
4. Toulouse School of Economics, University of Toulouse Capitole , Toulouse, France