Study Search Results Your query returned 2 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]: Special Tabulation on Aging (ICPSR 13577) United States Department of Commerce. Bureau of the Census; United States Department of Health and Human Services. Administration on Aging 2. CRELES-2: Costa Rican Longevity and Healthy Aging Study - Wave 2, 2006-2008 (Costa Rica Estudio de Longevidad y Envejecimiento Saludable, Ronda 2) (ICPSR 31263) Rosero-Bixby, Luis; Fernández, Xinia; Dow, William H.