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The SJR indicator is a variant of the [[centrality|eigenvector centrality measure]] used in network theory. Such measures establish the importance of a node in a network based on the principle that connections to high-scoring nodes contribute more to the score of the node. The SJR indicator has been developed to be used in extremely large and heterogeneous journal citation networks. It is a size-independent indicator and its values order journals by their "average prestige per article" and can be used for journal comparisons in science evaluation processes. The SJR indicator is a free journal metric inspired by, and using an algorithm similar to, [[PageRank]].
The ''SJR indicator'' provides an alternative to the [[impact factor]] (IF) or average citations per document in a 2-year period, abbreviated as "Cites per Doc. (2y)".<ref>{{cite journal | title= Free journal-ranking tool enters citation market | journal = [[Nature (journal)|Nature]] | date= 2 January 2008 | volume= 451 | issue= 6 | doi= 10.1038/451006a | author = Declan Butler | pmid= 18172465 | pages= 6 | bibcode= 2008Natur.451....6B | doi-access= free }}</ref><ref>{{cite journal | url = http://www.fasebj.org/cgi/content/short/22/8/2623 | title = Comparison of SCImago journal rank indicator with journal impact factor | author= Matthew E. Falagas| doi = 10.1096/fj.08-107938 | journal = [[The FASEB Journal]] | year = 2008 | issue = 8 | pages = 2623–2628 | pmid = 18408168 | volume = 22 |display-authors=etal}}</ref>
== Rationale ==
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