Philippe ROMAN, alumnus of the ENS LSH (Ecole Normale Supérieure Lettres et Sciences Humaines, Lyon) and agrégé in economic and social sciences, is a PhD student in social and economic sciences at REEDS. After a double Bachelor degree in Sociology and Econometry, a Master of Economics and a year spent in Brazil as a guest researcher, he obtained his Master in Ecological Economics from the UVSQ (First in class, 2008-2009). He is currently a lecturer and doctoral fellow at the UVSQ, where he is completing a thesis under the direction of Martin O’Connor, entitled «Economic distribution, ecological distribution and externalities: A political ecological economics project for the diversion other the Sao Francisco river in Brazil.”