Journal Citation Reports has just been updated. It now contains the journal impact factors for 2011.
The following is a brief refresher on the journal impact factor. The journal impact factor is published annually in a database called Journal Citation Reports and is calculated according to a formula. It is the citations that a journal receives in a given year to articles published in the previous 2-year period (for example, citations that a journal receives in 2011 to articles it published in 2009-2010). This number is then divided by the number of articles published in that previous 2-year period.
Some consider the journal impact factor to be a leading indicator in determining where to submit your manuscript for publication.
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