Between January 2014 and September 2015, the Mission Opérationnelle Transfrontalière (MOT – Cross-Border Operational Mission), with the support of the national technical assistance programme Europ’Act, carried out a study of economic development in the cross-border territories along France’s borders. This work aims to present the current situation with respect to cross-border economic development, both from the point of view of cooperation between private-sector players and public action.