Evaluating Estimates of Net Migration and Net Migration Rates Based on Survival Ratios Corrected in Varying Degrees
Abstract The effects of using survival ratios of different degrees of accuracy to estimate the net migration of the male Negro populations of 25 southern counties and six southern states during the three intercensal periods from 1930–1960 are examined. First, the differences within units (states and counties) produced by the four different sets of survival ratios are examined; and second, the differences between units are considered. In both cases differences are largest during the 1930–1940 decade and decrease at each successive intercensal period.