1. University of Cambridge
  2. University of Chicago
  3. University of Oxford
  4. Northwestern University
  5. University of Wisconsin-Madison
  6. University of Michigan
  7. Georgetown University
  8. University of Paris 1(Sorbonne)
  9. University of Cape Town
  10. University of Illinois-Urbana Champaign
  11. University of Illinois At Chicago
  12. Michigan State university
  13. University of California-Riverside
  14. London School of Economics And Political Science
  15. Yale