Search Results Use the search box below to revise your search, or start a new search. Studies (1) Variables Publications Your query returned 1 studies. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. Estimating the Unlawful Commercial Sex Economy in the United States [Eight Cities]; 2003-2007 (ICPSR 35159) Dank, Meredith; Khan, Bilal; Downey, P. Mitchell; et al.