Ivy League schools are viewed as some of the most prestigious universities in the world. All eight universities place in the top 17 of the 2020 "U.S. News & World Report" National Universities ranking, including four Ivies in the top five. "U.S. News" has named a member of the Ivy League as the best national university every year since 2001: , Princeton eleven times, Harvard twice, and the two schools tied for first five times. In the 2020 "U.S. News & World Report" Best Global University Ranking, three Ivies rank in the top 10 internationally (Harvard first, Columbia seventh, and Princeton eighth). All eight Ivy League schools are members of the Association of American Universities, the most prestigious alliance of American research universities.