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. Strategic Timing of Position-Taking in Congress: A Study of the North American Free Trade Agreement (ICPSR 1126) Box-Steffensmeier, Janet M.; Arnold, Laura W.; Zorn, Christopher J.W.