Guillaume Le Roux is an engineer in statistics and has a PhD in Geography. His research focus on interactions between urban change and spatial mobility. While working on Bogotá during his PhD at the Migrinter laboratory (University of Poitiers – CNRS), he contributed to various chapters of the book Mobilités et changement urbain : Bogotá, Santiago et São Paulo (2015), directed by François Dureau, Thierry Lulle, Sylvain Souchaud and Yasna Contreras. He is currently a postdoctoral fellow at the Institut National d’Études Démographiques (INED), where he conducts research on inequalities in accessing the residential areas of the Parisian agglomeration, during the 20th century.