From a RLUK Post:
The briefing outlines the latest evidence on increased impact for researchers in terms of visibility, usage and citation, together with a description of the benefits for the profile of institutions and the wider economic impact for society. We hope that research administrators and librarians will use the briefing to support the development of institutional polices mandating open access.
The briefing was written by Alma Swan.
Direct to Briefing (4 pages; PDF)