Marek Kwiek was again listed among Top 2% scientists globally in 2020 in so-called Stanford Ranking of Scientists.

Among 70,000 scholars ina broad field of Education, he was ranked about 500 (up from about 1,000 last year).

See: Baas, Jeroen; Boyack, Kevin; Ioannidis, John P.A. (2021), “August 2021 data-update for “Updated science-wide author databases of standardized citation indicators””, Mendeley Data, V3, doi: 10.17632/btchxktzyw.3

https://elsevier.digitalcommonsdata.com/datasets/btchxktzyw/3