INTERSTATE MIGRATION DIFFERENTIALS.

This report confines itself to aspect of interstate migration differentials. Its objective is to explain the variations in the annual interstate migration rates in the U.S. during the 13 year period 1947-1948 through 1959-1960. The underlying hypothesis is that age, sex, and year exert a selective influence upon annual interstate migration rates. The report analyzes annual Current Population Survey (CPS) data obtained in nationwide samples by the Bureau of the Census. It computes an analysis of variance for the selected sources of variation, employing conventional techniques. Specifically, it lays out the 13 annual CPS interstate migration rates for 1947-1948 through 1959-1960 in a randomized block design and analyzes them by the a mathematical model. Males have slightly higher interstate migration rates than females, even though the differences are insignificant. Females tend to move at younger ages than males and their peak movement comes at an earlier age. Whereas females 18 and 19 years of age tend to be more mobile than males, men 20-34 years of age generally have much higher interstate migration rates than females of the same ages. Dips in migration rates in 1954-1955, 1956-1957, and 1958-1959 signify minor contractions in business conditions and in opportunities.