Which countries would benefit most from an American brain drain?

I’m gonna assume that Brain Drain means that people who you spent resources as a country to train leave to spend their productive years elsewhere.

> Our proxy for talent is respondents who said they had completed an undergraduate degree.

Higher education in the US is mostly privatized. Society hasn’t born the cost of those undergraduate degrees. What does the US lose if they leave?

There’s also the question of whether other countries need people with undergraduate degrees. Do they need to save money on training their own citizens in liberal arts, nursing, engineering? That’s a bit unclear.