What characteristics distinguish people who migrate to a different country for a better income from others in their homeland? The fact that formal education alone is not enough to answer this question has been demonstrated for the first time in the specialist literature by a German-Mexican research team whose members include Prof. Dr Simon Wiederhold (Chair of Economics/Macroeconomics at the Catholic University of Eichstätt-Ingolstadt/KU) and Prof. Dr Jens Ruhose (Assistant Professor of Economics/Labour Economics and Economics of Migration at Kiel University).