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    Access Policy

The Fragile Families and Child Wellbeing Study
and The In-Home Longitudinal Study of Pre-School Aged Children

Data Alerts

August 12, 2013   A file with Nine-Year wave national and city-level weights for mothers and fathers is now available to the public. Go to the "Nine-Year Core and More" section to download this file.

November 1, 2011   Data from the Nine-Year wave of data collection are now available to the public. The data file contains data from the core biological mother and father, primary caregiver, child, and teacher interviews, as well as measures from the Home Visit, including cognitive tests, height/weight, primary caregiver self-administered questionnaire, and in-home observations.

May 26, 2011   The Three-Year In-Home Survey public use data release now includes the Toddler Attachment Q-SORT data.

March 21, 2011   One change has been made to the Five-Year In-home data since its initial release (January 2009): the anthropometric variable, cbmi_z, has been revised. The variable cbmi_z included in the 2009 data release contains the child’s BMI standardized score (Z-score) based on the BMI values calculated using the height and weight of children who participated in the In-home survey, regardless of age and gender. The updated cbmi_z, generated from the CDC Growth Charts program, is the child’s BMI-for-age standardized score, which can be used to compare one child’s BMI to the median BMI value of children in the reference population of the same age (in months) and gender.

May 26, 2010   Three-Year Child Care Provider and Five-Year Teacher Survey data are available for download as standalone files.

March 31, 2009   Updated data files for both Three-year and Five-year In-home Longitudinal Study of Pre-School Aged Children survey have been rereleased and are available from the OPR data archive. This release includes one main change to these data sets: the ID of the father (fathid3 or fathid4 in the Three-year and Five-year data, respectively) is now available for every respondent who completed a wave of the In-home survey, regardless of the participation of the father in the corresponding wave of the core father survey. Other changes include minor corrections to the labels of a few variables.

February 4, 2009   Five-Year in-home data are released and available for download from the OPR data archive.

The Fragile Families and Child Wellbeing Study

The Fragile Families and Child Wellbeing Study follows a cohort of nearly 5,000 children born in the U.S. between 1998 and 2000. The study over samples births to unmarried couples; and, when weighted, the data are representative of births in large U.S. cities at the turn of the century.

The Study was designed to address four questions of great interest to researchers and policy makers: (1) What are the conditions and capabilities of unmarried parents, especially fathers?; (2) What is the nature of the relationships between unmarried parents?; (3) How do children born into these families fare?; and (4) How do policies and environmental conditions affect families and children?

The Study consists of interviews with both mothers and fathers at birth and again when children are ages one, three and five. The parent interviews collect information on attitudes, relationships, parenting behavior, demographic characteristics, health (mental and physical), economic and employment status, neighborhood characteristics, and program participation.

Baseline, one-year, three-year, five-year, and nine-year follow up data from the Core Study are available to the public. Upon registration, users can download data files from the first five waves of the core study. For the first four waves, mother and father data are provided in separate data files, as well as a merged file with the baseline through year five waves. The nine-year wave combines mother, father, primary caregiver, child, and teacher interviews, as well as measures from the Home Visit, including cognitive tests, height/weight, primary caregiver self-administered questionnaire, and in-home observations, into one combined file. Each file contains records for all 4,898 births regardless of whether the respondent was interviewed in a given wave. Sample flags on each file indicate which cases were interviewed at each wave. Documentation is available on the Fragile Families web site located at www.fragilefamilies.princeton.edu/documentation.asp.

The In-Home Longitudinal Study of Pre-School Aged Children

The In-Home Longitudinal Study of Pre-School Aged Children collects data from a subset of the Fragile Families Core respondents at the three- and five-year follow-ups to ask how parental resources in the form of parental presence or absence, time, and money influence children under the age of five.

The In-Home Study collects information on a variety of domains of the child's environment, including: the physical environment (quality of housing, nutrition and food security, health care, adequacy of clothing and supervision) and parenting (parental discipline, parental attachment, and cognitive stimulation). In addition, the Study also collects information on several important child outcomes, including anthropometrics, child behaviors, and cognitive ability. This information has been collected through: interviews with the child's primary caregiver, and direct observation of the child's home environment and the child's interactions with his or her caregiver.

Data from the Three- and Five-Year In-Home Longitudinal Study of Pre-School Aged Children are also available for download as a standalone file. Similar information was also collected from families at the Nine-Year wave. However, data for the In-Home portion of the Nine-Year wave is contained in a combined file with the Nine-Year core biological parent interviews.

Please register for the Fragile Families data to get access. Documentation is available on the documentation page.

Also available are the Three-Year Child Care Provider and Five-Year Teacher Survey data. Register for downloading. Accompanying documention is found at the documentation page.

Documentation

Please visit the Fragile Families website to download the documentation and find out more about study and data files including:

  • Guide to the public use data
  • Questionnaires for all waves
  • Sample design paper and weighting documentation
  • Timeline for data availability, data alerts, and frequently asked questions (FAQ)
  • Review publications and working papers using the Fragile Families data
  • Latest Fragile Families News(data workshops, recent publications, press)

Contact Us

If you have any questions about the Fragile Families Study or problems obtaining or using the data, please email us at ffdata@princeton.edu.

Registration Required

To access these datasets, please login or register as a user of the data archive.

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Data and Statistical Services

Princeton University's Data Library is maintained by Data and Statistical Services (DSS), part of Firestone Library's Social Science Reference Center, has extensive data collection and offers statistical consulting.

Inter-university Consortium of Political and Social Research

If you can't find the data you need at Princeton, the next step is the ICPSR Archive at the University of Michigan. Especially, the Data Sharing for Demographic Research project (DSDR) provides resources to demographic data producers and users.

Office of Population Research, Princeton University, Wallace Hall, Princeton NJ 08544
Phone: (609) 258-4870 • Fax: (609) 258-1039 • Email: webmaster