Access Restricted Data
How Does DSDR Protect Respondent Confidentiality? ↓
DSDR ensures respondent confidentiality by removing, masking, or collapsing variables within public-use versions of the datasets. Sometimes these protective measures taken to reduce disclosure risk would significantly degrade the research potential of the data. In these cases, DSDR provides access to restricted use versions that retain confidential data by imposing stringent requirements for accessing these data.
What is Restricted Data? ↓
DSDR frequently restricts the access and use of datasets containing information that might compromise the anonymity or privacy of individuals. In particular, any dataset that includes information regarding populations at higher risk of deductive disclosure (such as children, adolescents, prisoners, and parents) is especially likely to be released as restricted.
View a sample restricted use data agreement (pdf).
How Do I Access Restricted Data? ↓
Users who wish to access restricted data must submit an application via ICPSR's online Data Access Request System (IDARS). By submitting an application via IDARS, users agree not to compromise the anonymity of individuals.
What is the ICPSR Data Access Request System (IDARS)? ↓
DSDR offers a basic service allowing users to fill out an online application for restricted data access through the ICPSR Data Access Request System (IDARS). To access the IDARS system, users must sign on with a MyData account or with their Facebook or Google passwords. To learn more, please access this visual IDARS guide (pdf 203K).
After a researcher completes and submits the application, DSDR carefully reviews and approves the request. The data is then burned into a CD/DVD and mailed to the researchers. Please note that DSDR does not evaluate the validity of the research question; rather, we assess the security measures undertaken by the researcher to prevent disclosure risk.
Where is the Link to Log into IDARS? ↓
Users can access the IDARS system through the following steps:
- Search for a study in the "Search Holdings" page
- Click on the desired study in the "Study Search Results" page
- Navigate to the "Access Notes" section of the study page
- Click on "apply online for access to the data"
How Long Does it Normally Take to Receive Restricted Data? ↓
The time it takes for a researcher to receive restricted data varies and depends on several factors. These factors include the quality and completeness of the researcher's application and the number of applications DSDR receives at any given time. On average it takes 3 to 5 weeks for an application to be approved and for the data to be shipped to the researcher.
Information about Add Health Restricted Use Data Agreements
For information regarding submitting a new application for Add Health restricted data access, renewing/transferring/terminating an Add Health agreement, adding a staff member to an agreement, submitting an annual report, or requesting additional Add Health data, please see the Add Health Agreement Materials page.