African students have traded academic institutions in the West for Chinese alternatives. The Trump administration’s clampdown on international students and visas could accelerate the shift.

© Qilai Shen for The New York Times

African students have traded academic institutions in the West for Chinese alternatives. The Trump administration’s clampdown on international students and visas could accelerate the shift.

A Harvard economist argues that a decline in manufacturing jobs is not what ails the United States.