The June 30, 2012 Dramatic Growth of Open Access is now available on The Imaginary Journal of Poetic Economics.
The most comprehensive search engine for open access archives, The Bielefeld Academic Search Engine (BASE), now searches more than 36 million documents. There are technical reasons why it is difficult to deduce the exact number of open access articles. However, some of the numbers from individual repositories suggest that a number approaching the BASE total are possible: PubMed connects with over 3.5 million documents; arXiv, 750,000; Social Sciences Research Network 350,000; and RePEC, over a million – that’s over 5.5 million documents from these 4 archives alone – and there are more than 2,000 open access archives around the world! DOAJ now has just under 8,000 titles, and is adding at a rate of 3 per day, and the newly launched Directory of Open Access Books already lists more than a thousand titles from 27 contributing publishers. The Electronic Journals Library lists over 35,000 journals of interest to academics that are freely available, and is adding 15 titles per day. The Internet Archive provides access to 670,000 movies, 100,000 concerts, 1.3 million audio recordings, and 3.5 million texts. No wonder that even open access opponents are now agreeing that OA is inevitable, and detailed by Stuart Shieber!