Charlotte Mueller points out in “Migration and Knowledge Transfer” (NVVN blog) that “migrants can be knowledge senders and knowledge receivers simultaneously, in their country of destination as well as in their country of origin.” Knowledge transfer and human migration can both be “circular.”
"Histories of Migrant Knowledge: Transatlantic and Global Perspectives," edited by Andrea Westermann and Onur Erdur, Bulletin of the German Historical Institute Supplement 15 (2020).