Talks and politics about the mobility and the attraction of high-qualified people increase with the development of the knowledge-based economy. This article aims at quantifying and qualifying migrations of French graduates. From the case study of Poitou-Charentes region, we demonstrate that graduate mobility is quite low. Taking into account ‘return’ and proximity effects further mitigate this mobility. Thus, regional levers for attractiveness seem limited.Avec le développement de l'économie des connaissances, les discours et les politiques sur la mobilité et l'attractivité vis-à-vis des qualifiés vont croissant. Cet article a pour objectif de quantifier et de qualifier les flux migratoires des diplômés du système éducatif français. A parti...