Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences of the United States of America
PNAS is one of the world's most-cited multidisciplinary scientific serials. Since its establishment in 1914, it continues to publish cutting-edge research reports, commentaries, reviews, perspectives, colloquium papers, and actions of the Academy. Coverage in PNAS spans the biological, physical, and social sciences. PNAS is published weekly in print, and daily online in PNAS Early Edition. The PNAS impact factor is 9.432 and the Eigenfactor is 1.681 for 2009. PNAS is available by subscription.
PNAS is abstracted and/or indexed in: Index Medicus, PubMed Central, Current Contents, Medline, SPIN, JSTOR, ISI Web of Science, and BIOSIS.
PNAS Online launched in January 1997 and now receives over 11.6 million hits per month. The site contains the full text, figures, tables, equations, and references of all articles in PNAS dating back to 1990.
PNAS articles are also published online before print in a feature called PNAS Early Edition as soon as they are accepted and final author changes are made. Release of articles became daily in June 2002. The date of online release is posted on the Web site and is the official date of publication. Papers are published online 1 to 5 weeks before they appear in print. PNAS can now offer publication in as little as 3.5 weeks after acceptance to authors who return their proofs quickly
PNAS offers a series of special feature issues that highlight emerging fields in the physical, social, and biological sciences and are edited by leaders in the field. Special features include a cluster of perspectives and peer-reviewed research articles. As a service to readers, special features are freely available online from the date of publication. Bound reprints are available for a nominal fee. Submission of related research papers is highly encouraged.
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PNAS is available to negotiate agreements with national and local consortia, offering customized pricing that takes into consideration multiple factors such as the number of sites involved, with the objective to increase the availability of high-quality content amongst the scientific community.
These are some of the standard parameters used:
- Multiple years contract for three years
- Fixed price cap for the duration of the contract, lower than the standard yearly increase from the publisher’s catalogue
- Deeply Discounted Price for print subscriptions
- Perpetual Access guaranteed after the termination of contract
- “Opt-out” clause in case of superior or irresistible force (force majeure)