Study Search Results Your query returned 4 results. Series results are grouped under the most relevant study. You can ungroup series results. Use the search box below to revise your search, or start a new search. 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. National Health Interview Survey, 1987: Adoption Supplement (ICPSR 9342) United States Department of Health and Human Services. National Center for Health Statistics 2. National Survey of Families and Households, 1987-1988 (ICPSR 6041) Bumpass, Larry L.; Sweet, James A. 1 more results in National Survey of Families and Households Series 3. Panel Study of Income Dynamics, 1968-1999: Supplemental Files (ICPSR 3202) Hofferth, Sandra; Stafford, Frank P.; Yeung, Wei-Jun J.; et al. 4. Swedish Adoption/Twin Study on Aging (SATSA), 1984, 1987, 1990, and 1993 (ICPSR 3843) Pedersen, Nancy L.