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I think the Swat data is telling, for within a community where profs have been extraordinarily successful in reproducing themselves, relative to the rest of the community, "Asians" have opted out.
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<p>Students would not be complaining about unintelligible (mostly Asian) TAs if Asian students did not go into Ph.D. programs in large numbers. There are more and more profs of Asian origin at American universities; most of them can be found in departments of science (including computer science), engineering and med schools.</p>