Skip to main content

Table 2 Proportion of publisher-provided (gold) open access in major indexes

From: Anatomy of open access publishing: a study of longitudinal development and internal structure

Articles indexed in Scopus 2008 2009 2010 2011
   Totala 1,469,286 1,550,413 1,588,636 1,658,643
   In full immediate OA journalsb 118,751 133,817 163,670 181,706
Share of articles published in full immediate OA journals 8.1% 8.6% 10.3% 11%
   Hybrid OAc 4,718 8,095 10,135 12,089
   Delayed OAd 78,054 82,271 81,404 85,714
Total share OA 13.7% 14.5% 16.1% 16.9%
Articles indexed in Web of Knowledge 2008 2009 2010 2011
   Totale 1,154,803 1,203,692 1,235,202 1,294,051
   In full immediate OA journalsb 76,537 85,852 103,514 116,192
Share of articles published in full immediate OA journals 6.6% 7.1% 8.4% 9.0%
   Hybrid OAc 3774 6476 8108 9671
   Delayed OAd 76,076 80,338 79,058 83,420
Total share OA 13.5% 14.3% 15.4% 16.2%
  1. aAll articles + reviews, retrieved 22 May 2012 through scopus.com; bresults of this study; cresults of previous research [8]; dresults of an ongoing study by the authors, based on absolute volume calculations for articles in 462 unique journals available through HighWire Press, PubMed Central, Elsevier and so on with an open access delay of 12 months or less; eall articles + reviews included in the Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index, retrieved 22 May 2012 through apps.webofknowledge.com. OA: open access.