Guillaume Sauloup is a Ph.D student in geography at the University of Paris 1 Panthéon-Sorbonne (UMR Prodig-CNRS). He analyses street economies in Sudan. He conducted five fieldworks since 2010 with the assistance of CEDEJ. After a first study (for a master degree) on construction laborers, his current research focuses on street workers in several neighborhoods of the capital of the Sudan (Khartoum 2, Souk el arabi, Mayo, Deim). The aim of the research is to understand the contribution of street jobs in the shaping of urban space and their role in the « urban belonging » of workers. Guillaume is currently writing his thesis and teaching at the university.