The Roper Center for Public Opinion Research is one of the world's leading archives of social science data, specializing in data from surveys of public opinion. The data held by the Roper Center range from the 1930s, when survey research was in its infancy, to the present. Most of the data are from the United States, but over 100 nations are represented.
Roper Centre Public Opinion Archives is covered by Thomson Reuters Data Citation Index. Roper Center is a member of Data Preservation Alliance for the Social Sciences (Data-PASS). A list of Roper Members is available at https://ropercenter.cornell.edu/list-of-members/; Data fees are available at https://ropercenter.cornell.edu/fees/