The University of Southampton
University of Southampton Institutional Repository

OA Impact Advantage = EA + (AA) + (QB) + QA + (CA) + UA

Harnad, Stevan (2005) OA Impact Advantage = EA + (AA) + (QB) + QA + (CA) + UA

Record type: Other


The OA impact advantage arises from at least the following 6 component factors, three of them (2,3,5) temporary, three of them permanent (1,4,6): 1. EA: EARLY ADVANTAGE, beginning already at the pre-refereeing preprint stage. Research that is reported earlier can begin being used and built upon earlier. The result turns out to be not just that it gets its quota of citations sooner, but that quota actually goes up, permanently. This is probably because earlier uptake has a greater cumulative effect on the research cycle. 2. (AA): ARXIV ADVANTAGE, the special advantage of self-archiving specifically in Arxiv for physicists, because it is a central point of call: OAI-interoperable Institutional Repositories is likely -- for many reasons -- to supersede this, so it will eventually make zero difference which OAI-compliant IR one deposits in, as access will be through OAI cross-archive harvesters, not directly through individual OAI Archives. 3. (QB): QUALITY BIAS, arsing from article/author self-selection; this does not play a causal role in increasing impact: The higher-quality (hence also higher-impact) articles/authors are somewhat more likely to be self-archived/self-archivers in these early (15%) days of self-archiving: this bias will of course vanish as self-archiving approaches 100%). 4. QA: QUALITY ADVANTAGE, allowing the high-quality articles to compete on a level playing field, freed of current handicaps and biasses arising from access affordability differences. A permanent effect. 5. (CA): COMPETITIVE ADVANTAGE, for self-archived papers over non-self-archived ones, in early (15%) days; this too will of course disappear once self-archiving nears 100%, but at this moment it is in fact a powerful extra incentive, for the low % self-archiving fields, institutions and individuals. 6. UA: USAGE ADVANTAGE: OA articles are downloaded and read three times as much. This too is a permanent effect. (There is also a sizeable correlation between early download counts and later citation counts.)

HTML OAA.html - Other
Download (8kB)

More information

Published date: 2005
Keywords: open access, research impact, citations, self-archiving, download statistics, scientometrics
Organisations: Web & Internet Science


Local EPrints ID: 262085
PURE UUID: 5d8acfc1-d142-47f3-93d4-90cb426099d5

Catalogue record

Date deposited: 14 Mar 2006
Last modified: 18 Jul 2017 08:54

Export record


Author: Stevan Harnad

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.