Income inequality and urban/rural migration

"The purpose of this paper is to examine some of the consequences of [U.S.] migration trends from 1970-1980, focusing on the relationship of income inequality within a state with population shifts within and across states. Furthermore, we wish to determine if the movement of wealth and the changing employment opportunities [have] had any effect on the distribution of income within the four census regions and for urban and rural populations across all fifty states." Data are from the 1970 and 1980 censuses.