These data were compiled from the National Science Foundation (NSF) Survey of Postdocs at Federally Funded Research and Development Centers, Fall 2013. The survey collects aggregate counts of postdoctoral researcher (postdocs) at each FFRDC according to the postdoc's source of financial support, citizenship, sex, ethnicity, race, and field of research. The FFRDC Postdoc Survey began in 2005 and is administered in conjunction with the Survey on Graduate Students and Postdoctorates in Science and Engineering (GSS).

For data on research and development expenditures at FFRDCs, see the R&D Expenditures at FFRDCs report series at http://www.nsf.gov/statistics/ffrdc/. For data on federal R&D obligations and funding to FFRDCs, see the Federal Funds for R&D report series at http://www.nsf.gov/statistics/fedfunds/. The most recent Master Government List of Federally Funded R&D Centers can be found at http://www.nsf.gov/statistics/ffrdclist/.