Data archives restrict access to certain data sets and variables in order to ensure confidentiality for study participants. Archives are concerned about respondent confidentiality with regard to either:
Therefore, data archives sometimes make data files available in one or more of the following categories:
Many data providers will make restricted data available under a restricted data use agreement. Applications for restricted data typically require information such as:
Some data files contain sensitive information with an even greater likelihood of identifying individuals. Such data can only be used in a data enclave, in which the researcher performs their data analysis on-site in an enclave and then takes away only research results.
Examples of data enclaves include:
1. Census Research Data Centers
Researchers can apply for access to unpublished data from the Census Bureau's economic and demographic programs at either:
If you are acquiring data for your research from a private company, you may be asked to sign a nondisclosure agreement (NDA), which outlines the rights of all parties. Any such agreement should be MIT officials (such as those from the Office of the General Counsel or the Office of Sponsored Program), who will work with you to ensure that the agreement complies with MIT policies and retains for your rights for academic freedom, so that you are free to publish your results.