Migration from a place (especially migration from your native country in order to settle in another)
1
Michigan is no stranger to what demographers call "out-migration." Recession drove people away in the early 1980s.
2
Puerto Rico is trying to stem rampant out-migration, reduce a 45 percent poverty rate, and fix near-insolvent public healthcare and pension systems.
3
Out-migration of the Mainstream doesn't seem to explain the full extent of the transformation, however.