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* The Carnegie Classification of Institutions of Higher Education ®   * NSF National Center for Science and Engineering Statistics, Ranking of Graduate School size and   Note that the universities with NoQuest or Proquest-optional policies are all heavy-hitters in terms of research output and scholarly impact. Their institutional status is noted below in terms of Carnegie Classification; top ranking in graduate program size (according to [NSF's NSF's  Science and Engineering Doctorates Report2014](http://wayback.archive-it.org/org-963/20160210160522/http://www.nsf.gov/statistics/2016/nsf16300/data-tables.cfm))  and membership in the prestigious Association of American Universities. ### This list continues to grow.