Jonathan P. Tennant et al. have published an e-print for review of "The Academic, Economic and Societal Impacts of Open Access: An Evidence-Based Review" in F1000 Research.
Here's an excerpt:
This review presents published evidence of the impact of Open Access on the academy, economy and society. Overall, the evidence points to a favorable impact of OA on the scholarly literature through increased dissemination and reuse. OA has the potential to be a sustainable business venture for new and established publishers, and can provide substantial benefits to research- and development-intensive businesses, including health organisations, volunteer sectors, and technology. OA is a global issue, highlighted by inequalities beset at all levels between developing and developed nations, and largely fueled by financial inequality. Current levels of access in the developing world are insufficient and unstable, and only OA has the potential to foster the development of stable research ecosystems. While predatory publishing remains an ongoing issue, particularly in the developing world, increasing public engagement, development of OA policies, and discussion of sustainable and ethical publishing practices can remove this potential threat to OA.