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The Lancet Child & Adolescent Health (paediatrics) launched in 2017. According to the Journal Citation Reports, The Lancet Oncology had a 2021 impact factor of 54.433, The Lancet Neurology had 59.935, and The Lancet Infectious Diseases had 71.421. [8] There is also an online website for students entitled The Lancet Student in blog format ...
The impact factor relates to a specific time period; it is possible to calculate it for any desired period. For example, the JCR also includes a five-year impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years. [14] [15]
The measure is calculated as SNIP=RIP/(R/M), where RIP=raw impact per paper, R = citation potential and M = median database citation potential. [11] Journal Tier – One of the few indicators based not on citations but objective user ratings and reviews. [12] PageRank – in 1976 a recursive impact factor that gives citations from journals with ...
The simplest journal-level metric is the journal impact factor, the average number of citations that articles published by a journal in the previous two years have received in the current year, as calculated by Clarivate.
In any given year, the CiteScore of a journal is the number of citations, received in that year and in previous three years, for documents published in the journal during the total period (four years), divided by the total number of published documents (articles, reviews, conference papers, book chapters, and data papers) in the journal during the same four-year period: [3]
The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.
Think about the impact of this in economic terms of supply and demand. What is the expected price impact on a good if it suddenly becomes significantly more difficult to produce?
The calculation of the SJR indicator is similar to the Eigenfactor score, with the former being based on the Scopus database and the latter on the Web of Science database, [3] and there are other differences. [4]