Restricted Use Contract Data

The Fragile Families & Child Wellbeing Study releases restricted use contract data to the public via a Contract Data Agreement. Before requesting restricted use contract data, please read this full page for details on the data accesses requirements and process.

You may request one or more of the following data files. Please click on the name of each file you are interested in to see more details and documentation. 

Residential Context Files

  Brief description (follow link for more information) Time points
Geographic identifiers focal child's birth city (baseline only), mother's and father's state of residence, and stratum and psu (baseline-Year 15) (note: replicate weights are available on the public file in lieu of these) Sample city at Baseline, State at Baseline and Years 1, 3, 5, 9, and 15
Census tract measures Census-tract level demographic, housing, and income characteristics from the U.S. Census for the census tracts of mothers’ and fathers’ residence Baseline and Years 1, 3, 5, 9, and 15
Labor market and macroeconomic MSA-level Consumer Sentiment Index from the Survey of Consumers; and unemployment/labor force participation, and jobs by age/sex/education from the Bureau of Labor Statistics Baseline and Years 1, 3, 5, and 9
Opportunity Insights County-level measures of intergenerational mobility and characteristics correlated with intergenerational mobility from Chetty and Hendren's Opportunity Insights Baseline and Years 1, 3, 5, and 9
Gun Violence* Incident-level data on time and location of gun violence in 2014 to 2017 from the Gun Violence Archive Year 15
Uniform Crime Reports County-level crime rates (counts/county population) for all crimes, violent crimes, and property crimes from the FBI Unified Crime Reports database Baseline and Years 1, 3, 5, 9, and 15

*Note: the Gun Violence Archive data are linked to both residential address and to school address.

School Context Files

  Brief description (follow link for more information) Time points
School characteristics - NCES School-level characteristics including school type, pupil-to-teacher ratio, school’s racial composition, Title I funding, percent of students receiving free and reduced price lunch, and more from the National Center for Education Statistics Common Core Grade 1 and at Years 9 and 15
School characteristics - SEDA School district-level measures from 2009 to 2013 of educational inequality and characteristics correlated with educational inequality from the Stanford Educational Data Archive Years 9 and 15
School characteristics - CRDC School-level measures from 2009, 2011, and 2013 of school resources, disciplinary outcomes, and other characteristics related to school environments from the Civil Rights Data Collection Years 9 and 15

*Note: the Gun Violence Archive data are linked to both residential address and to school address.

Biological and Health Files

  Brief description (follow link for more information) Time points
Medical records 

Information for mothers and children regarding health during pregnancy and at birth from the birth hospitalization record

Candidate genes

Candidate gene variables and telomere length for focal children and their biological mothers

Year 9
Genotype array

Genotype data on focal children. This genetic information can be linked to a limited subset of phenotype variables. To download this file, please request access through the dbGaP data archive here. You do not need to complete a restricted data application with CRCW. (Note: This file cannot be merged to other restricted use contract data or to the public FFCWS data.)

Years 9 and 15
Polygenic Scores

Polygenic scores for a variety of phenotypes, principal components, and analytic group flags for focal children. 

Year 9

Access to FFCWS restricted use contract data is limited to researchers who agree to the terms and conditions contained in the Contract Data Agreement. Institutional Review Board (IRB) approval of the researcher’s research and data protection plans are required. Therefore, only faculty and research personnel at institutions which have an Institutional Review Board/Human Subjects Review Committee are eligible to receive access to the restricted use contract data. The Institution’s IRB must be registered with the U.S. Office for Human Research Protections (OHRP) or the National Institute of Health (NIH). Although nearly all research universities and other research organizations in the United States have IRB’s registered with the OHRP, we are aware that some institutions and legitimate researchers will be excluded from access under this condition. We apologize for this and are considering options to expand the pool of eligible researchers while maintaining a high standard of protection for our respondents.

Please note:

  • University students may gain access to the restricted use contract data for dissertation research, but a faculty advisor must serve as the Investigator and complete the application process for them. The faculty advisor and institution bear full responsibility for ensuring that all conditions of the license are met by the student. The student must also sign the Supplemental Agreement with Research Personnel form.
  • If co-investigators are from different institutions, you will need separate Contract Data Agreements for each institution.

How to apply for restricted use contract data

Applying for restricted use contract data is a two-step process including a preliminary application and the full application.

Preliminary application - Before beginning work on the full application, researchers should submit the Preliminary Application Form, along with a draft of their structured abstract and a CV for each person who will be included in the application, to CRCW (c/o in order to get preliminary approval.

Full application - For complete instructions on the full application, see Contract Data Agreement below. To be given access to the restricted use contract data, you must submit the following items to CRCW via email to

  1. A structured abstract describing your project and what you hope to accomplish, and a one-paragraph justification for why you need access to the restricted use contract data rather than public use data (including which files are being requested).
  2. Written assurance by the researcher that his/her institution has an Institutional Review Board (IRB) for Human Subjects which has a Multiple Project Assurance (MPA) or Federalwide Assurance (FWA) from NIH. The MPA or FWA number must be submitted with the application.
  3. Your university IRB must approve both your final research plan (structured abstract) and your final data protection plan form. You are required to submit proof of IRB approval.
  4. A data protection plan form, detailing how you plan to protect the files while they are being used, on your computer and after they are printed.
  5. An application fee of $500 (payable by check or money order to CRCW).
  6. A signed Contract Data Agreement by the Principal Investigator.
  7. A signed Contract Data Agreement by a senior university official who binds the university/institution. This refers to an individual who has the authority to represent your organization in agreements of this sort, such as a Vice President, Dean, Provost, Center Director, or similar official.
  8. A signed Supplemental Research Agreement with Research Personnel for each person who will have access to the data.
  9. A curriculum vitae for each person who will be accessing the information.
  10. A copy of the Collaborative Institutional Training Initiative (CITI) certificate of completion for all research personnel who will access the restricted use contract data. The online certification can be completed at If you are a new CITI learner, please register and complete the Social and Behavior - Basic/Refresher course. Evidence of comparable training is also acceptable.

Please see the Contract Data Agreement (updated June 2022) for instructions and necessary paperwork.

If you have any questions about this process, please see the Contract Data FAQ. You may also email with remaining questions.