Question

what forced many forst dwaller use to migrate

Answer 1

Large numbers of people born in poor countries would like to leave those countries, but barriers
prevent their emigration. Those barriers, according to economists’ best estimates to date, cost the
world economy much more than all remaining barriers to the international movement of goods
and capital combined. Yet economists spend much more time studying the movement of goods
and capital, and when they study migration at all, they focus on the effects of immigration on
nonmigrants in destination countries. I ask why this is the case and sketch a four-point research
agenda on the effects of emigration. Barriers to emigration deserve a research priority that is
commensurate with their likely colossal economic effects.