I have questions about affirmative action as described in this answer to another question (also called positive discrimination) in the context of US universities, more specifically departments recruiting assistant professors.
What is the evidence that using positive discrimination to select assistant-professor candidates is efficient at promoting diversity?
How does it compare to granting scholarships to (or waiving tuition fees for) minority undergraduate students as an attempt to promote diversity at the very beginning of the academic curriculum and hoping this diversity will propagate to the pool of applicants to assistant professor positions when these students arrive on the job market?
I would like to learn about real examples and facts and figures suggesting why these policies worked or didn’t work.