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. Comparative Socio-Economic, Public Policy, and Political Data,1900-1960 (ICPSR 34) Hofferbert, Richard I. 2. Socio-Economic, Public Policy, and Political Data for the United States, 1890-1960 (ICPSR 15) Hofferbert, Richard I.