Inter-University Consortium for Political and Social Research (ICPSR) ICPSR is the world's largest collection of digital social science data and cover topics from sociology, political science, economics, demography, education, child care, health care, crime,minority populations, aging, terrorism, substance abuse, mental health, public policy, and international relations. More information about accessing data in ICPSR can be found here: https://www.lib.umd.edu/data/icpsr.