> We can measure the rate of learning. Google scholar counts the number of times a paper is cited by other papers. I believe that well-informed scholars who cit

> We can measure the rate of learning. Google scholar counts the number of times a paper is cited by other papers. I believe that well-informed scholars who cite the original paper ought to cite the subsequent papers. Possibly related, but Google and the very concept of PageRank was born out of Page and Brin's work on Backrub, which attempted to surface the importance/relevance of an academic paper based on which other papers cited it.