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. Japan 2000 National Survey on Family and Economic Conditions (NSFEC) (ICPSR 21120) Tsuya, Noriko O.; Choe, Minja K.; Bumpass, Larry L.; et al. 2. Japan 2009 National Survey on Family and Economic Conditions (NSFEC) (ICPSR 34647) Choe, Minja; Tsuya, Noriko; Rindfuss, Ronald; et al.