NAHDAP's mission is to preserve deposited files in perpetuity. Our online deposit form provides a secure upload of files and establishes the terms and conditions of the data transfer.
To complete a data deposit, follow the directions on the online Deposit Form. Please select NAHDAP from the drop-down menu to make sure your data is archived with us. Also, continue to the second page of the form to enter information about method of data collection, sampling, and any restrictions on data releases.
NAHDAP follow's ICPSR's standard model for preparing data. Information about how ICPSR prepares data for public release is available online.
NAHDAP urges researchers to plan for the archiving and dissemination of the project's data when they begin their research, even before any data come into existence. For archiving, electronic files are necessary for data and preferred for all documentation.
The following files are necessary for deposit:
Final version of each dataset generated during the project, including scale or other derived variables created for published analyses
Programming code necessary to reproduce all constructed measures and original data analysis, including but not limited to associated databases, database queries, images, or PowerPoint slides
Codebook listing the variable names, variable labels, value labels, and missing value designations (an SPSS dictionary with these elements can suffice)
Blank copy of each data collection instrument
User guide, manual, or other data collection protocols
IRB approval and blank copy of each consent form
Inventory of the files deposited.
Prior to deposit, researchers are encouraged to read our brochure on Preparing Data for Deposit to NAHDAP (PDF 966K), which provides tips on preparing the actual data file. For example, how to handle missing data codes.
Restricted-Use Data Archiving
For data that contain indirect identifiers that may pose disclosure risk for respondents, NAHDAP staff can assist with preparing a restricted-use archiving and dissemination plan. For institutions or Institutional Review Boards that want a legal document to cover such situations, NAHDAP has a Restricted-Use Deposit and Dissemination Agreement available. The agreement is not required to deposit such data with NAHDAP.
For more information on NAHDAP's processes for confidential data, see our Restricted-Use Data Deposit and Dissemination Procedures (PDF 277K).
Confidentiality regarding the data must be addressed before deposit.
Depositors with any questions or with deposits that involve physical materials should contact NAHDAP staff.
Deposit Your Research Findings
NAHDAP would like to add your published finding to our Bibliography of Data-related Literature. The Bibliography links your publication to the data used for your analyses. Please use our citation form or email us at firstname.lastname@example.org.
NAHDAP and ICPSR Resources
- Preparing Data for Deposit to NAHDAP (PDF 966K)
- Ways to Release Data from NAHDAP (PDF 1MB)
- Why Share Data With NAHDAP? (PDF 1.1MB)
- Restricted-Use Data Deposit and Dissemination Procedures (PDF 277K)
- ICPSR Guide to Social Science Data Preparation and Archiving
- Confidentiality and Privacy
- Guidelines for Effective Data Management Plans