Search Results Use the search box below to revise your search, or start a new search. Studies (3) Variables Publications Your query returned 3 studies. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. Mexico Panel Study, 2012 (ICPSR 35024) Greene, Kenneth 2. Studies in International Integration (ICPSR 5517) Segal, Aaron 3. Studies in International Integration, 1967 (ICPSR 5507) Haas, Ernst B.; Schmitter, Philippe C.