Scientific output can be summarized in many ways and through different approaches, taking into account the total number of publications or only the number of publications in which the author is either the first or the senior author; consider the total citation index value; the number of highly cited publications, such as those cited more than 100 times, and the citation index without taking into account self-citations when the author him/herself refers to his/her article in another of his/her articles.
Citation metrics are widely used and unfortunately misused. Authors John P. A. Ioannidis, Kevin W. Boyack and Jeroen Baas have created a publicly available database of 100,000 top-scientists that provides standardized information on citations, h-index, co-authorship adjusted hm-index, citations to papers in different authorship positions and a composite indicator. Separate data are shown for career-long and single year impact. Metrics with and without self-citations and ratio of citations to citing papers are given. Scientists are classified into 22 scientific fields and 176 sub-fields. Field- and subfield-specific percentiles are also provided for all scientists who have published at least 5 papers.
The authors of the database have provided analyses that use citations from Scopus with data freeze as of May 6, 2020, assessing scientists for career-long citation impact up until the end of 2019 (Table-S6-career-2019) and for citation impact during the single calendar year 2019 (Table-S7-singleyr-2019). Updated databases and code are freely available in Mendeley: (https://dx.doi.org/10.17632/btchxktzyw)
Both tables include 8 scientists from Latvia, 50% or 4 of them are from our institute – Linards Skuja (Skuja, Linards), Roberts Eglītis (Eglitis, Roberts I.), Aleksejs Kuzmins (Kuzmin, Alexei) and Jevgēnijs Kotomins (Kotomin, E. A.).
