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Figure 4 | EPJ Data Science

Figure 4

From: Reciprocity and impact in academic careers

Figure 4

Results at the level of groups of authors. (a) Excess reciprocity as a function of the number of citations received. Error bars denote 95% confidence level intervals. (b) Rich-club coefficient of the APS author citation network with respect to the null model (see Methods) in the 1950s, 1970s, and 2000s. Here in-degree refers to the total weight received by the author in the author citation network

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