Groop, Richard E. & Schaetzl, Randall J. (1997) Productivity Profiles of PhD-Granting Geography Departments in the Unites States: 1980-1994. The Professional Geographer 49 (4), 451-464.
Abstract: In our study, 48 U.S. departments that grant geography PhDs are compared along four measures of academic productivity. Using 19801994 as the base period, research productivity of faculty was assessed by counting book titles, as well as authorships in 77 journals. Teaching productivity was determined by placement of PhDs in graduate programs of geography in North America, and by a weighted index of teaching outcomes. Data were summed for departments, but are reported primarily as productivity per person (per FTE count). The results point to a wide variety of departmental profiles, from those departments that appear to emphasize teaching outcomes to those that are more productive in book publishing and journal authorship, with several exhibiting a balance between teaching and research.
The National Research Council survey and ranking of US doctoral programs (http://www7.nationalacademies.org/resdoc/). Data are available for the last survey in 1995, along with information about the upcoming survey in 2006.