Jean-Philippe Berrou is assistant professor in development economics at Sciences Po Bordeaux. He is member of the unit research LAM (Les Afriques dans le Monde) UMR-CNRS 5115. His main researches are based on an interdisciplinary perspective and deals with (i) the dynamics of urban labor market and informal entrepreneurship in developing countries (mostly African countries), (ii) social networks analysis, (iii) the social construction of markets and (iv) growth and structural changes in Africa. He has leaded and took part to several field surveys in Burkina Faso, Senegal, Ivory Coast and Colombia. He currently coordinate three research programs: (i) The role of social networks on access to job on the Bogota's labor market (Colombia); (ii) ICT uses and the dynamics of informal micro and small enterprises in Dakar (Senegal); (iii) The rise of middle classes in developing countries. A comparative analysis of Brazil – Ivory Coast – Turkey – Vietnam (Ivory Coast).