The majority of ICPSR data holdings are public-use with no access restrictions and ICPSR ensures respondent confidentiality within public-use versions of its datasets. Sometimes the protective measures taken to reduce disclosure risk would significantly degrade the research potential of the data. In these cases, ICPSR provides access to restricted use versions that retain confidential data by imposing stringent requirements for accessing them.
Review the Accessing Restricted Data at ICPSR to learn to identify restricted use studies, and how to apply for access.