Open access versus subscription journals: a comparison of scientific impact.

The article presents a study that compares the scientific impact of open access (OP) journals with subscription journals, controlling for journal age, the country of the publisher, discipline and their business model. The study uses the two-year impact factors as a proxy for scientific impact, and Directory of Open Access Journals (DOAJ) to identify OA journals. It reveals that OA journals indexed in Web of Science and/or Scopus have the same impact and quality as subscription journals.