Gibson and McKenzie argue that there is no conclusive evidence that countries either suffer or lose from highly skilled migration. One thing that is certain is that the biggest impact is on the migrants themselves.
Our findings question both the pessimistic view that high-skilled migration hurts development, and the optimistic view that most countries can benefit to the extent Taiwan, China and India have from trade and investment flows. For most countries, the first-order effects are mostly an individual phenomenon – individuals stand to gain a lot from migration, and the second-order effects on others are small in comparison and seem to at least balance one another out if not also be a net positive. In the absence of compelling evidence for massive externalities from their presence, we argue governments should not be so concerned about high rates of skilled emigration, but focus instead on the basics of providing the policy environment needed to foster growth and innovation at home.