Study Search Results Your query returned 3 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Most Downloaded (?) Study Title/Investigator 1. Census of Population and Housing, 2000 [United States]: 5-Percent Public Use Microdata Sample: Elderly Households Extract (ICPSR 4204) National Archive of Computerized Data on Aging 2. Kaiser Permanente Study of the Oldest Old, 1971-1979 and 1980-1988: [California] (ICPSR 4219) Haan, Mary N.; Rice, Dorothy P.; Quesenberry, Charles P.; et al. 3. Victoria Longitudinal Study (ICPSR 117) Dixon, Roger A.