Cited Half-Life

The Cited Half-Life of a journal is the median age of the articles in the journal that were cited in Clarivate Analytics' Journal Citation Reports (JCR) each year. This means that half of the total number of citations to articles in the journal are to articles which were published more recently than the Cited Half-Life. For example, if a journal's Cited Half-Life in 2018 is 5.0 years, this means that half of the citations to articles in the journal were to articles published in 2014-2018 and the other half to articles published before 2014.

Citing Half-Life

The Citing Half-Life of a journal is the median age of the articles cited by the journal in Clarivate Analytics' Journal Citation Reports (JCR) each year. This means that half of the total number of citations from the journal's current articles are to articles that were published more recently than the Citing Half-Life. For example, if a journal's Citing Half-Life in 2018 is 8.0 years, this means that half of the citations from articles in the journal were to articles published in 2011-2018 and the other half to articles published before 2011.

Note that both the Cited Half-Life and the Citing Half-Life are calculated using data from the Web of Science database.