Answer:
The mean center of the population of the United States shifted to the South and West as workers migrated to areas with more jobs and a warmer climate.
Step-by-step explanation:
The migration of skilled workers leads to greater economic growth in the region. Children get better opportunities for higher education. The population density is reduced and the birth rate decreases.
The economic experience of the 1950s and 1960s – rapid economic growth with relatively closed borders – cannot be repeated today because there are fewer underutilized Southerners, Puerto Ricans, and women who could enter the workforce as substitutes for immigrants. Teenagers, some of the unemployed, and others who have dropped out of the labor force could provide some growth in the number of workers but nowhere near enough to substantially increase the number of hours worked and make up for relatively low growth in the other factors of production. Immigrants did not crowd out many American migrants. The substitution of southern and Puerto Rican migrants petered out sometime between 1960 and 1970 before international immigration could substitute and at a time when the percentage of immigrants was the lowest ever recorded in American history. Immigration restrictions face a trade-off between more restrictive immigration and economic growth that they should be weighing more carefully than they currently do.