Indeed, the periods in American history with the fastest growth have been periods of pell-mell interregional migration.

Flows to and from Miami account for 52 percent of all interregional migration in the Cuban settlement system".

Since then, as has previously been noted for interregional migration, the composition of migration streams from the cities has become even more highly skewed towards the better-off.

However, its share of Brazil's total had grown rapidly in the 1970s and early 1980s as a result of interregional migration, as well as high rates of natural increase.

Michael Tadman wrote in Speculators and Slaves: Masters, Traders, and Slaves in the Old South (1989) that 60-70% of interregional migrations were the result of the sale of slaves.