The ÃÛ¶¹ÊÓƵ ranks 20th in the world in terms of its academic and research performance, the in China announced in September. Organizers of the study said their rankings are "based on internationally comparable data that everyone could check," such as number of Nobel Prize laureates and articles cited in scientific journals. The U.S. has 17 of the world's top 20 University ofersities, with Harvard topping the list.