Study Search Results Your query returned 4 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. High School and Beyond, 1980: A Longitudinal Survey of Students in the United States (ICPSR 7896) United States Department of Education. Institute of Education Sciences. National Center for Education Statistics 2. National Survey of Midlife Development in the United States (MIDUS II), 2004-2006 (ICPSR 4652) Ryff, Carol; Almeida, David M.; Ayanian, John S.; et al. 3. Study of Dementia in Swedish Twins, 1990-1999 (ICPSR 25963) Gatz, Margaret; Pedersen, Nancy 4. Swedish Adoption/Twin Study on Aging (SATSA), 1984, 1987, 1990, and 1993 (ICPSR 3843) Pedersen, Nancy L.