| More information about journal pricing is available at
Ted Bergstrom's Journal Page. Also see our sibling EigenFactor.Org and our project on Big Deal Contracts. Here are some of our opinions. Here are summary statistics. Finally, here is an explanation of the calculations.
This website represents our best attempt to compute the price per article and price per citation. Currently we use the ISI data for citations through 2007 and 2009 prices, which are the most recent data available to us. Not all journals report information the same way, and errors are possible. When reported to us, we correct errors. Moreover, prices per unit for journals that have recently expanded are underestimated. The coloration (red for very low value, yellow for low value, and green for good value) is computed by comparing the composite price index to the median for non-profit journals in the same subject. Be advised that price per citation, price per article and the composite index are not perfect measures of value. Neither of us are experts in most of the fields represented, and others may reasonably, or unreasonably, disagree with the value assessment. We have mapped a large set of journal categories into 17 areas. Here is the full mapping. We have updated the non-profit status of nearly 100 journals by writing to editors.
This site was created by Ted Bergstrom and Preston McAfee. We thank Vera te Velde for terrific assistance. Report an error, but note that if a journal is missing, usually it is because Ulrich's or Thomson's JPI is missing necessary data, and such errors should be reported directly to them.
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