Study Search Results Your query returned 1 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. (?) Study Title/Investigator 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.