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. 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. American Identity and Representation Survey, 2012 (ICPSR 36410) Schildkraut, Deborah 2. Detroit Area Study and Chicago Area Study, 2004 (ICPSR 23820) Farley, Reynolds; Krysan, Maria; Couper, Mick P. 3. Longitudinal Study of the Second Generation in Spain (ILSEG) (ICPSR 36286) Portes, Alejandro; Aparicio, Rosa; Haller, William; et al.