Clarivate to exclude retracted content when calculating impact factor

Clarivate, the owner of Web of Science, has said that this year it will start excluding citations to and from retracted content when calculating a journal’s impact factor.

The retracted articles will still be included in the article count to maintain transparency and accountability, senior vice president at Clarivate and editor-in-chief of Web of Science Nandita Quaderi said in a blog post on 15 May, but will no longer contribute to the numerical value of the journal impact factor (JIF).