Origin and destination entropies of U.S. 1965-70 age-sex-specific intercounty migration flows

"Eight independent pairs of entropy-based rankings of 3,140 U.S. county-level units are obtained. The criteria employed are the homogeneities of the distribution of 1965-70 in- and out-migrants of each county--for eight age-sex-specific groups--over the other 3,139 counties. The most homogeneous counties for males of ages 19-39 in 1970 consistently have major military facilities." The results show that "for those 65 and over, Florida, Arizona and Texas counties have the broadest in-migration, while Northern metropolitan counties have dispersed out-migration. The cross-correlations of entropies--though all strongly positive--are lowest between those 19-39 and those 65 and over, and relatively weak, in general, between those 65 and over and other groups. In all eight demographic groups, destination entropies reach higher values than origin entropies."