The Inter-university Consortium for Political and Social Research (ICPSR) is a membership-based, non-profit data archive located at the Institute for Social Research at the University of Michigan. It serves member colleges and universities in the United States and abroad by providing: Access to the world's largest archive of computerized social science data, Training facilities for the study of quantitative social analysis techniques, Resources for social scientists using advanced computer technologies. PSU users get access to ICPSR by creating an individual account using their PSU e-mail ID. This is what identifies them as a PSU affiliate. We do not have IP access. Go to: http://www.icpsr.umich.edu/icpsrweb/ICPSR/index.jsp - See login at top left. Note: occasionally you will need to login using a computer on campus to validate that you are still a PSU affiliate.

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 back to the 1930s. The archive provides access to their resources through two principle resources:iPOLL allows you to search a database of more then 400,000 questions from surveys. Response frequencies are provided for each question and for some questions simple cross-tabulations are available [these are designated with a RoperExplorer Icon].Roper Express provides searching capablity and access to the code books and raw data files of Over 10,000 US and 8,000 International polls. Note: there are many questions in iPOLL that do not have corresponding data files in Roper Express.