The regional distribution of the foreign-born population is determined by two principal migration processes: internal and external migration, modified, of course, by the impacts of mortality. (Since the fertility of the U.S. foreign-borns increases only the population of native-borns, it only...

This paper addresses the question of how to formally represent the spatial structure of an observed origin-destination-specific pattern of interregional migration flows. Such a representation allows an analyst to compare the spatial structures of different migration regimes and contrast their...