The term "brain drain" is used to describe the trend of qualified people with high levels of education and skills feeling forced to leave their country of origin to seek better economic opportunities elsewhere. Often, brain drain migration occurs from developing countries, leaving certain nations or even entire regions facing depleted workforces and a reduction of specific skill sets as highly educated workers seek labor elsewhere, often in developed nations.
How extensive is the issue? Which nations suffer from the phenomenon most? Click through the gallery to find out.