Study Search Results Your query returned 1 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. Welfare Dimensions Summary Scores (WDSS): Measuring State Welfare Policy Variations and Change in the United States, 1996-2003 (ICPSR 33561) De Jong, Gordon F.; Graefe, Deborah Roempke; Hall, Matthew; et al.