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. Political Systems Performance Data: Sweden, 1865-1967 (ICPSR 36) Peters, B. Guy 2. Social Structure of Argentina: Census Data on Economic Development, 1965 (ICPSR 57) Di Tella, Torcuato S.