Figure 5From: Differences in collaboration structures and impact among prominent researchers in Europe and North AmericaEvolution of impact with repeated collaborations. Mean normalized logarithmic impact of publications authored by a pair of prominent researchers (PR) as a function of the collaboration number (the number of times two prominent researchers have co-authored a paper: 1-2, 3-5, or >5; Methods). The normalized logarithmic impact \(I_{i}\) of a paper i is the logarithmic number of citations (plus 1) \(\log (k_{i}+ 1)\) of the paper divided by the mean of the logarithmic number of citations (plus 1) of papers with no prominent researcher collaboration in the same publication year (Methods). (A) inequalities in health, (B) network science, (C) network ecology, (D) metabolomics, (E) development economics, (F) philosophy of science, (G) genetics and (H) cognitive psychology. (I) Aggregated normalized logarithmic impact for all fields, as a function of the number of collaborationBack to article page