It’s brain drain from other countries, especially China. The pipeline was simple: go to a mid tier Chinese university for undergraduate studies, get a masters o

It’s brain drain from other countries, especially China. The pipeline was simple: go to a mid tier Chinese university for undergraduate studies, get a masters or PhD from an American university, be advantaged in H1B due to this graduate degree, get a green card and settle permanently. That’s the brain drain. This pipeline has slowed down massively.