Last year the Association of College and Research Libraries issued a very substantial and thorough review of the research that has been done on how to measure library value: “The Value of Academic Libraries: A Comprehensive Research Review and Report” by Megan Oakleaf. Althought its focus is academia, there are sections reviewing work in public libraries, school libraries, and special libraries. I recommend the section on special libraries, which has quite an emphasis on medical libraries, including references to past work regarding clinical impacts.
For those who are interested in approaches that libraries have taken to establishing their value, there is potential benefit in reading the entire report cover-to-cover. For those who want a quick overview, these are sections that I recommend:
For more information about this report, see “A tool kit to help academic librarians demonstrate their value” from the 9/14/2010 issue of the Chronicle of Higher Education.
The full report is available at http://www.acrl.ala.org/value/.