Metropolitan and nonmetropolitan migration streams: 1935-1980.

Results based on an analysis of migration streams involving the metropolitan and nonmetropolitan sectors and covering a longer time interval than previously possible indicate that efforts to describe changes in the volume of movements connecting these sectors could benefit from greater attention to other related streams as well as existing patterns of population concentration. The metropolitanization process continues but is now being affected substantially by regional redistribution trends. Regional differentials in the size of metropolitan and nonmetropolitan migration streams are declining but are still substantial, so an equilibrium balance between the metropolitan and nonmetropolitan sectors will probably not occur in the immediate future.