Scientists from the Peoples’ Friendship University of Russia (PFUR), Centre National de la Recherche Scientific (France) and the University of Leicester (United Kingdom) have shown how the wealth of a country relates to its migration rates. A new mathematical model forms the basis for future research in this field. The study was published in Nonlinear Analysis. The results were presented at the VIII International Conference on Differential and Functional Differential Equations DFDE-2017 held on August 13-20 in the PFUR.