Research impact of paywalled versus open access papers

Authors : Éric Archambault, Grégoire Côté, Brooke Struck, Matthieu Voorons

This note presents data from the 1science oaIndx on the average of relative citations (ARC) for 3.3 million papers published from 2007 to 2009 and indexed in the Web of Science (WoS).

These data show a decidedly large citation advantage for open access (OA) papers, despite them suffering from a lag in availability compared to paywalled papers.