The GREQAM ("Groupement de Recherche en Economie Quantitative d'Aix Marseille") is a research centre located in Aix-en-Provence and Marseilles (France). Greqam includes more than 80 researchers from the Aix-Marseille University, the CNRS (the French national centre for research), the Ecole des Hautes Etudes en Sciences Sociales (EHESS), and the engineering school Ecole Centrale de Marseille, 17 administrative staff, and more than 75 PhD students.