UChicago: Penn = 40%: 60%
UChicago: Duke: 43%: 57%
UChicago: Northwestern: 69%:31%
UChicago: JHU: 69%:31%
IvyPlus Landscape: (Caltech is a little special, not included)
结论: T5 - Columbia/Penn/Duke/UChicago - NU/JHU/Cornell/Brown/Dartmouth
其实就是 大 - 中 - 小藤 定位