Search Results Use the search box below to revise your search, or start a new search. Studies (2) Variables Publications Your query returned 2 studies. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. Current Population Survey, September 2015: Volunteer Supplement (ICPSR 36411) United States Department of Commerce. Bureau of Census; United States Department of Labor. Bureau of Labor Statistics; Corporation for National and Community Service 2. National Congregations Study - 1998, 2006, and 2012 [Cumulative Cross-Sectional File and Panel File] (ICPSR 36316) Chaves, Mark A.