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. Series results are grouped under the most relevant study. Ungroup series results to view all results. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. Executions in the United States, 1608-1940: The ESPY File -- Summary Data of Executions Collected by M. Watt Espy Between 1986 and 1996 (ICPSR 23900) Espy, M. Watt; Allen, Howard; Clubb, Jerome M.