Eger T, Scheufen M, Meierrieks D. The determinants of open access publishing: survey evidence from Germany. Social Science Research Network March 13, 2013
Results of a 2012 survey showed significant differences between the scientific disciplines with respect to researcher's awareness of and experience with both open access journals and self-archiving. Results also suggested that the relevance of OA journals within a discipline drives the OA decision. Several other aspects like copyright law, age or profession can play a role.