Citation Advantage of Open Access Articles
2006

Open Access Increases Citation Rate

Sample size: 1492 publication 10 minutes Evidence: high

Author Information

Author(s): Gunther Eysenbach

Primary Institution: Centre for Global eHealth Innovation, University Health Network; and Department of Health Policy, Management and Evaluation, University of Toronto

Hypothesis

Does open access publishing lead to a citation advantage for research articles?

Conclusion

Open access articles are cited more often and more quickly than non-open access articles.

Supporting Evidence

  • Open access articles were cited more often than non-open access articles.
  • Non-open access articles had a higher likelihood of being uncited.
  • Open access articles had a higher average number of citations.

Takeaway

When researchers make their articles freely available, more people read and cite them, which helps spread their ideas faster.

Methodology

A longitudinal bibliometric analysis comparing citations of open access and non-open access articles published in the same journal.

Potential Biases

There may be selection bias in authors choosing to publish their most important work as open access.

Limitations

The study only provides a short-term view of citation patterns and may not account for all confounding factors.

Participant Demographics

Authors came from 39 different countries, with the majority from the United States.

Statistical Information

P-Value

0.001

Confidence Interval

1.1–1.6

Statistical Significance

p < 0.001

Digital Object Identifier (DOI)

10.1371/journal.pbio.0040157

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