记得七星剑写过一个程序，用USNews提供的数据排名，前几名和这个排名很接近。

ZT
很简单，就是每所学校有个ALL RANKING page，
比如
princeton的是
http://colleges.usnews.rankingsandreviews.com/best-colleges/princeton-university-186131/overall-rankings
Harvard的是
http://colleges.usnews.rankingsandreviews.com/best-colleges/harvard-university-166027/overall-rankings
那个page里有很多条目的排名。没有数字的略去。只算有数字的。把这些数字加起来再除以条目总数就可以了。

Items

1 Massachusetts Institute of Technology 3.722 90
2 Harvard University 4.071 112
3 University of California--Berkeley 5.063 143
4 Stanford University 5.457 129
5 Princeton University 5.667 75
6 California Institute of Technology 5.932 44
7 Yale University 8.000 87
8 University of Pennsylvania 8.926 95
9 University of Chicago 9.188 64
10 Columbia University 9.813 91
11 Johns Hopkins University 10.889 54
12 Duke University 11.746 67
13 Cornell University 12.672 61
14 Northwestern University 13.491 57
15 Vanderbilt University 17.610 41
16 Washington University in St. Louis 18.622 37
17 Brown University 24.200 25
18 Rice University 27.333 21
19 Dartmouth College 33.000 16
20 University of Notre Dame 39.667 24