Stephen Pinfield and Christine Middleton have published "Researchers' Adoption of an Institutional Central Fund for Open-Access Article-Processing Charges: A Case Study Using Innovation Diffusion Theory" in SAGE Open.
Here's an excerpt:
This article analyzes researchers' adoption of an institutional central fund (or faculty publication fund) for open-access (OA) article-processing charges (APCs) to contribute to a wider understanding of take-up of OA journal publishing ("Gold" OA). Quantitative data, recording central fund usage at the University of Nottingham from 2006 to 2014, are analyzed alongside qualitative data from institutional documentation. The importance of the settings of U.K. national policy developments and international OA adoption trends are considered. Innovation Diffusion Theory (IDT) is used as an explanatory framework.