Like the Impact Factor, the Eigenfactor Score and Article Influence® Score use citation data to assess and track the influence of a journal in relation to other journals. Eigenfactor Metrics are available only for JCR years 2007 and later.
You can learn more about Eigenfactor Score and Article Influence Score at www.eigenfactor.org.
Eigenfactor Metrics, Eigenfactor Score, Article Influence® Score are Licensed Marks used with permission from the University of Washington
The Eigenfactor® Algorithm-2008, was developed by the Metrics Eigenfactor Project: a bibliometric research project conducted by Professor Carl Bergstrom and his laboratory at University of Washington.