Migration stock and the issue of competing and complementary flows in United States interstate migration

"The purpose of this paper is to study the determinants of interstate migration in the United States from 1965-1970 when a new change in direction of migration has started, and to examine the flow creation or flow diversion that results from migration to some appealing regions. Several related variables have been selected and tested for gross interstate migration flows. The results show that overall both push and pull factors have not been important.... Distance was not found to act as a significant deterrence to migration, whereas population density of origin and destination was significant. Previous migration was found to have a very strong effect on migration. The results of the study also suggested that there has been a major change in the location of growth areas in the United States during 1955-1970."