This paper from Siler el al. (2018) confirms the appearance of a new hierarchy where researchers affiliated to low-ranked institutions are less likely to submit their papers to open access (OA) journals. It is not difficult to find positive attitudes towards OA from Universities, but they lack of an established policy of funding OA publications. This should be a challenge that we might achieve.
Authorial and institutional stratification in open access publishing: the case of global health research. PeerJ 2018; 6:e4269 Available in URL https://doi.org/10.7717/peerj.4269
Antonio Vidal-Infer 