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. Occupational Changes in a Generation, 1962 and 1973 (ICPSR 6162) Blau, Peter M.; Duncan, Otis Dudley; Featherman, David L.; et al. 2. United States Census of Mortality: 1850, 1860, and 1870 (ICPSR 2526) Fogel, Robert W.; Ferrie, Joseph; Costa, Dora; et al.