Ranking the Rankings

University rankings are popping up everywhere. So how do they compare with one another? One way is to check the correlation between the total scores of the rankings. Here, correlations have been calculated for the scores of ten US universities (every tenth university in the Shanghai rankings excluding those not in the THE-QS top 400).

It seems that the Shanghai ARWU is the most valid of five rankings Correlations for total scores are .796 with the THE-QS, .712 with the USNWR America's Best Colleges, .896 for the Professional Ranking of World Universities (Paris) and .628 for the Center for College Affordability and Productivity.

It looks like on the basis of this extremely small and unrepresentative sample that if you had to pick just one ranking to rely on then it would have to be the Shanghai ARWU.