In growing numbers, experts say, highly educated children of immigrants to the United States are uprooting themselves and moving to their ancestral countries. They are embracing homelands that their parents once spurned but that are now economic powers.Some...had arrived in the United States as young children, becoming citizens, while others were born in the United States to immigrant parents.Enterprising Americans have always sought opportunities abroad. But this new wave underscores the evolving nature of global migration, and the challenges to American economic supremacy and competitiveness.For generations, the world’s less-developed countries have suffered so-called brain drain — the flight of many of their best and brightest to the West. That has not stopped, but now a reverse flow has begun, particularly to countries like China and India and, to a lesser extent, Brazil and Russia.
This is what has been called the brain gain--young people become educated in the US or Europe and then head off to the less developed countries of their recent ancestors, and help to move the economic ball forward in those places. My own view is that this is ultimately good for everyone. If this is a "challenge" to American economic supremacy and competitiveness it is a positive challenge because it means that the rest of the world is catching up with us, and we are going to have to be even more creative if we want to stay ahead of the pack.