OCLC Research and Ithaka S+R are examining the impact of increased institutional differentiation in universities on the organization of academic libraries and the services they provide. For decades, models of excellence in academic library service have been shaped by a collections-centric paradigm in which the size of local print inventory is considered a key indicator of quality. OCLC Research and Ithaka are joining forces to develop a new framework for understanding the fit between emerging library service paradigms and university types.