Search Results Use the search box below to revise your search, or start a new search. Studies (7) Variables Publications Your query returned 2 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results. Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance 1. Retirement History Longitudinal Survey, 1979 (ICPSR 8344) Social Security Administration 5 more results in Retirement History Longitudinal Survey Series 2. RAND Health Insurance Experiment [in Metropolitan and Non-Metropolitan Areas of the United States], 1974-1982 (ICPSR 6439) Newhouse, Joseph P.