"Comment on Gabriel Felbermayr and Wilhelm Kohler "

Abstract

The present paper is a very substantial enhancement of the earlier version . It is more focused on the central point, using theoretical representative cases , for example, of the levels of skillied labor (high, medium, and low) or of small and large economies. In spite of the theoretical emphasis, empirical foundations and historical trends have not been forgotten. In addition, an effort has been made to link the theoretical approach to immigration to the major theorems of international economics, particularly those concerning trade and specialization as they relate to factors (specific-factors theory of the Ricardo-Viner type versus the Heckscher-Ohlin model). Indeed, even if we could accept that we are dealing with a phenomenon that is rather different from trade, the in-depth study of immigration requires that it must be compared with other international flows in a comprehensive way. Other improvements could also be mentioned here but the paper has mainly gained in clarity and precision , and I am sure it will be a useful instrument for researchers