Fig. 2
From: SciSciNet: A large-scale open data lake for the science of science research

Matching NSF reference string to MAG records. (a) Distribution of Z-scores for papers matched in ElasticSearch with the first and second highest scores. The vertical red line denotes the right-tail cutoff of the second score distribution (P = 0.05). (b) Distribution of pairwise Z-score differences for papers matched in search engine but with the first score no higher than the right-tail cutoff of the second score distribution (P = 0.05).