, I say, "Because most publishers and journals already give blanket permission for green OA, the burden is on authors to take advantage of it....The reason the spontaneous rate [of self-archiving] is lower than the nudged, assisted, and mandated rate is rarely opposition to OA itself. Almost always it's unfamiliarity with green OA (belief that all OA is gold OA), misunderstanding of green OA (belief that it violates copyright, bypasses peer review, or forecloses the possibility of publishing in a venerable journal), and fear that it is time-consuming. In this sense, author unfamiliarity and misunderstanding are greater obstacles to OA than actual opposition, whether from authors or publishers." Add this note. 