The Graduate School of Library and Information Science at the University of Illinois at Urbana-Champaign has released Identifying Factors of Success in CIC Institutional Repository Development: Final Report.
Here's the abstract:
With support from the Andrew W. Mellon Foundation, the GSLIS Center for Informatics Research in Science and Scholarship at the University of Illinois at Urbana-Champaign undertook a one-year pilot study to investigate advances in institutional repository (IR) development. The aim was to learn about successes and challenges experienced by IR initiatives at university libraries that had made a substantial commitment to developing and sustaining an IR. Three sites were studied using the comparative case study method. They were purposefully selected to represent varying approaches to IR development undertaken at research libraries with similar missions and users.