Open Access Articles Have a Greater Research Impact Than Articles Not Freely Available

Do open access articles have greater citation impact?: A critical review of the literature

NOTICE: This is the author's version of a work accepted for publication by Elsevier. Changes resulting from the publishing process, including peer review, editing, corrections, structural formatting and other quality control mechanisms, may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently pub...

The Research Impact of Open Access Journal Articles

The acquisition of open access research articles

It is shown that it takes several years for a mandatory policy to be institutionalized and routinized, but that once it has been the deposit of articles takes place in a remarkably short time after publication, or in some cases even before. Authors overwhelmingly deposit well before six months after publication date. The OA mantra of ‘deposit now, set open access when feasible’ is shown to be n...

Citation Advantage of Open Access Articles

Open access (OA) to the research literature has the potential to accelerate recognition and dissemination of research findings, but its actual effects are controversial. This was a longitudinal bibliometric analysis of a cohort of OA and non-OA articles published between June 8, 2004, and December 20, 2004, in the same journal (PNAS: Proceedings of the National Academy of Sciences). Article cha...

Open Access does not increase citations for research articles from The Astrophysical Journal

Lawrence (2001) first showed that research articles which have been posted on the internet have higher citation rates than articles which have not. The initial assumption was that this was causal, because more people could access and read these papers they were cited more. This assumption was strengthened by the analysis of Harnad and Brody (2004), who used physics articles which were either de...