<p>Datalook: The performance ranking is huge weight to quality of the output: Average citation per paper, H-Index papers and Number of articles in high impact journal. It looks into short term and long term productivity. Most of the professors I talked to think that this ranking is the best. The next best objective rankings are funding from various funding agencies. But that will limit the ranking to US universities. The only drawback for the performance ranking is that it is not normalized by the number of faculties. I also like to point out that Stanford has a lot more faculty than 2000 because medical center stream faculties are not counted, but their publications are counted as Stanford production.</p>