“Shopping in the Greater Paris in 2030. Commercial centralities, and urban change around the future ‘Grand Paris Express’ stations”, a research project launched in January 2014. The project is funded by the Paris Municipality as part of the call for projects “Paris 2030”. Coordinated by A. Fleury and M. Delage, this project focuses on commercial centralities in the Paris metropolis, in connection with the profound changes brought about by the future ‘Grand Paris Express’ network. How do commercial centralities evolve in this context? What are the retailers’ strategies on the one hand, and the strategies of the public authorities on the other, and how do they contribute to the (re)shaping of these centralities? Led by a team involving members of PARIS and CRIA teams (Geographie-cités), as well as colleagues from University Paris Est Marne-la-Vallée, the project focuses on the former “Red Belt” of Paris, which is currently affected by major changes, not only in connection with new transport infrastructures, but also with major development projects, and dramatic social transformations.