Where do assistant professors come from?

The 740 assistant professors in the database come from 108 different PhD programs. The raw ranking is given below. Of course, this does not take into account the size of the program or where the graduates were placed.

1. Harvard (50)
2. UCBerkeley (46)
3. Michigan (36)
4. Princeton (33)
5. Columbia (32)
6. Stanford (29)
7. Yale (27)
8. Chicago (26)
9. UCLA (22)
10. Rochester (20)
11. Duke (19)
12. UC San Diego (18)
13. Cornell (16)
13. Ohio State (16)
15. Michigan State (15)
16. UNC (14)
17. Minnesota (13)
18. NYU (12)
19. MIT (11)
19. U. of Washington (11)
21. Washington U. (10)
22. Emory (9)
22. Indiana (9)
22. Texas A&M (9)
25. Arizona (8)
25. CalTech (8)
25. Georgetown (8)
25. Wisconsin (8)
29. Florida State (7)
29. Illinois (7)
29. Northwestern (7)
29. Rutgers (7)
29. UCDavis (7)
34.-38. George Washington, Iowa, SUNY Stony Brook, Texas-Austin, Virginia (6 each)
39.-44. Johns Hopkins, Maryland, Oxford, Pittsburgh, Rice, UC Irvine (5 each)
45.-51. Colorado, Georgia, Notre Dame, Penn State, Pennsylvania, SUNY Binghamton, Toronto (4 each)
52.-57. Claremont, Florida, Houston, Stanford (Business), UC Santa Barbara, Vanderbilt (3 each)
58.-70. Arizona State, Boston College, Cambridge, Missouri, MIT (Economics), New Mexico, New Orleans, New School for Social Research, North Texas, SUNY Buffalo, Syracuse, Syracuse (PA), Wisconsin-Milwaukee (2 each)
71.-108. Akron, American, Brandeis, Brown, Cambridge (History), Colorado-Denver (GSPA), Connecticut, EUI, Fordham, Georgia State, Hawaii, Kansas, Kentucky, Lund, Massachusetts, Melbourne, Michigan (Communication), Michigan (Philosophy), Missouri-St. Louis, Nebraska, North Carolina State, Ohio State (Psychology), Oregon, Pittsburgh (GSPIA), Purdue, Rutgers (PA), South Carolina, Stanford (Communication), Stanford (Education), Texas-Dallas, Toulouse (Economics), UC Riverside, UCBerkeley (Rhetoric), UCDavis (Ecology), UCLA (Economics), UCLA (Policy), UCLA (Psychology), Virginia Commonwealth (1 each)