Open Access News

News from the open access movement

Friday, March 23, 2007

Major upgrade to eigenfactor

Eigenfactor is a free tool from Carl Bergstrom and Ted Bergstrom for "evaluating the influence of scholarly periodicals and for mapping the structure of academic research."  It aims to surpass the Impact Factor in accuracy and to remain free of charge for the scholarly community. 

The last time I blogged it (January 2007), only a preview version was online that indexed only 1,800 journals, all in the social sciences.  Now --though it is still in beta-- it indexes all the 7,000+ journals listed in Thompson's Journal Citation Reports (JCR), including those in the natural sciences.  It also indexes 110,000+ reference sources not listed in JCR, including reference books, newspapers, trade magazines, and software packages.  Check it out.