Home   |   Projects   |   Papers   |   About   
Home > Terms of use
Terms of Use

These Eigenfactor Terms of Use are supplemental to the standard UW Terms and Conditions of Use.

The Eigenfactor website is provided as a service for evaluating the influence of scholarly periodicals and for mapping the structure of academic research. We are committed to broadly disseminating our research findings and technological developments, while respecting the confidentiality of the data sources we used and the intellectual property owned by the respective entities. By using the service you agree to abide by the Terms of Use defined below. Violation of the Terms of Use can result in suspension or termination of your access to the service. You should check these Terms periodically for updates, and your continued use after such updates means you consent to the Terms of Use.


The methods used to compute Eigenfactor® score, and Article Influence®, and many of the other statistics presented on this website are nonproprietary and generally available for use. The Eigenfactor® algorithm is described in a series of scholarly publications and specified in detailed in our technical specification. The algorithm that we use to map the structure of science, known as the Map Equation or InfoMap, is described in Rosvall and Bergstrom (2008) and Rosvall et al. (2010). Extensions are presented in Rosvall and Rosvall (2010) and Rosvall and Bergstrom (2011). A few of the algorithms and innovations presented, including the Eigenfactor Recommends™ article recommendation system, are patent pending. These require written permission from the University of Washington for their use.

Results generated by the Eigenfactor website including tables, graphs, and other presentations of data, may be protected by copyright and by the respective owners of such copyright.


Eigenfactor.org provides services and products which are associated with a number of trademarks. Eigenfactor® and Article Influence® are owned by the University of Washington and are registered trademarks in the United States and the European Union Member States. Consequently, when using the publicly available methods and algorithms on your own data, you are not permitted to use the University’s marks, Eigenfactor® Score and Article Influence® Score. You may identify the output of your application (e.g. scores) using your own terms. Use of Eigenfactor® score and Article Influence® score is not allowed without written permission from the University of Washington. Contact license@uw.edu for information.

A number of other trademarks are associated with the website. A non-exhaustive list includes eigenfactor.org™, Eigenfactor® Recommends™, and Eigenfactor® Project™, and the Eigenfactor design mark(s).

Third Party Data and Intellectual Property

This website contains content owned by third parties, including data, copyrighted materials, and trademarks. Such content is used by the University of Washington under license or other permission from such third parties. Unless as otherwise provided by law or as expressly permitted in connection with specific content, the third party content may not be reproduced, modified, distributed, displayed, performed, or used in any way without the prior written permission of University of Washington or the third-party owner.


The Eigenfactor.org website is free for personal or academic non-commercial purposes. Results may be downloaded, stored, printed, and referenced as long as the results are attributed to Eigenfactor.org and the University of Washington. Results are not allowed to be used to create a product or service that replaces or serves as an alternative to using the Eigenfactor.org service itself. Any direct or indirect commercial use of the website, trademarks, results, or other content requires a license. Please contact license@uw.edu to inquire about licensing services related to the Eigenfactor project.

Warranty and Disclaimer

The Eigenfactor service, including algorithms, methods, and resultant output, is provided on “as is” basis. Although every effort is made to keep the results and underlying data accurate as possible, they should be used for informational purposes only. Accordingly, all warranties and forms of liability from your use of this website are disclaimed to the extent applicable in your jurisdiction. If you have questions as to whether or not your intended use of the website conforms to the Terms of Use please contact us through the website contact page.

Contact | Terms of Use | University of Washington