Brain drain is one of the problem for the pace of development explain​

Brain drain and the economic development of home countries are two interdependent processes. First, a brain drain affects development, and its effect becomes unambiguously negative when the emigration rate is high. Second, a lack of economic growth motivates college graduates to emigrate. Interactions between these two variables can be the source of vicious and virtuous circles linked to individual decisions to migrate.

Once a significant brain drain gets under way, it can have damaging effects on the economy that induce further waves of emigration by high-skilled workers (Iran after the 1978–1979 revolution, the Irish crisis of the early 1980s, the ex-USSR republics after 1991). But when a return is significant, it gives incentives to other waves of returnees to come home (Ireland after the fiscal reform of 1987, Taiwan in the 1980s).

Explanation:

Once a significant brain drain gets under way, it can have damaging effects on the economy that induce further waves of emigration by high-skilled workers.  But when a return is significant, it gives incentives to other waves of returnees to come home (Ireland after the fiscal reform of 1987, Taiwan in the 1980s).

depends.

explanation:

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.