[DM] "A note on declining dependency ratios and migration"

[rfmcdonald]

I've a post up at Demography Matters that takes a look at the declining ratio of workers to dependents in economies around the world. Replacement migration of one kind or another can help things out, in receiving countries at least, but replacement migration has to be carefully thought-out so as to avoid creating immigrant underclasses. (Canada and South Korea are mentioned.)