Citation

Himmelstein DS, Romero AR, Levernier JG, Munro TA, McLaughlin SR, Greshake Tzovaras B, Greene CS. Elife 2018; 7: e32822.

Affiliation

Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, United States.

Copyright

(Copyright © 2018, dLife Sciences Plublications, Ltd)

DOI

10.7554/eLife.32822

PMID

29424689

PMCID

PMC5832410

Abstract

The website Sci-Hub enables users to download PDF versions of scholarly articles, including many articles that are paywalled at their journal's site. Sci-Hub has grown rapidly since its creation in 2011, but the extent of its coverage has been unclear. Here we report that, as of March 2017, Sci-Hub's database contains 68.9% of the 81.6 million scholarly articles registered with Crossref and 85.1% of articles published in toll access journals. We find that coverage varies by discipline and publisher, and that Sci-Hub preferentially covers popular, paywalled content. For toll access articles, we find that Sci-Hub provides greater coverage than the University of Pennsylvania, a major research university in the United States. Green open access to toll access articles via licit services, on the other hand, remains quite limited. Our interactive browser at https://greenelab.github.io/scihub allows users to explore these findings in more detail. For the first time, nearly all scholarly literature is available gratis to anyone with an Internet connection, suggesting the toll access business model may become unsustainable.

© 2018, Himmelstein et al.

Language: en

Keywords

LibGen; Sci-Hub; copyright; journals; none; open access; paywalls