How can journal rankings be misused?
Oct. 2016 -- Thomson Reuters was acquired by Onex Corporation and Baring Private Equity Asia the company is renamed Clarivate Analytics
1988 Thomson Reuters acquired the Institute for Scientific Information (ISI)
Rankings are based on the number of times articles within a journal are cited and the prestige of the journals where the citations appeared.
.The journals in SCIMago are drawn from the library's Scopus database.
Currently, there are about 32,000 journals indexed SCIMago while the Journal Citation Report database from Clariviate (publishes the impact factor only indexes 12,000 journals
CitesScore from Elsevier is new freely available resource that ranks and evaluates over 22,000 journals based on how often their articles are cited by other journals. Here are some issues with this new metric:
Doesn’t always correlate with Clarivate Analytics (formerly Thomson Reuters) Impact Factor
Counts *all* document types such as letters and editorials
Elsevier, the company responsible for CiteScore, also publishes journals
CiteScore evaluates almost twice as many journals as Clarivate Analytics (Thomson Reuters) Impact Factor