The open-access journal PLoS ONE has swiftly expanded since its launch in late 2006 to become the world's largest journal; it has already published more than 9,000 articles this year (see chart). Its growth has encouraged the launch of an innovative open-access journal, PeerJ, which announced its business model on 12 June. But instead of charging authors per article, a one-off membership fee will give them the rights to publish peer-reviewed articles in PeerJ for life. See page 166 for more.
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