"The State of OA: A Large-Scale Analysis of the Prevalence and Impact of Open Access Articles"

Heather Piwowar et al. have self-archived "The State of OA: A Large-Scale Analysis of the Prevalence and Impact of Open Access Articles."

Here's an excerpt:

We estimate that at least 28% of the scholarly literature is OA (19M in total) and that this proportion is growing, driven particularly by growth in Gold and Hybrid. The most recent year analyzed (2015) also has the highest percentage of OA (45%). Because of this growth, and the fact that readers disproportionately access newer articles, we find that Unpaywall users encounter OA quite frequently: 47% of articles they view are OA. Notably, the most common mechanism for OA is not Gold, Green, or Hybrid OA, but rather an under-discussed category we dub Bronze: articles made free-to-read on the publisher website, without an explicit Open license.

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Copyright © 2005-2017 by Charles W. Bailey, Jr.

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