Data and Documentation


Data are free to download from Princeton University's Office of Population Research (OPR) data archive.

Currently, there are six waves of publicly available data including baseline and Year 1, Year 3, Year 5, Year 9, and Year 15 follow-ups. In order to protect the confidentiality of survey respondents, geographic identifiers, medical records data, contextual data (i.e., census tract characteristics), macroeconomic indicators, and genetic biomarkers are not available in the public use data files. Researchers may apply for these data via a restricted use contract.


FFCWS has documentation to help you understand and utilize the data. The general documentation page is a good place to start with details about sampling, survey weights, the Guide to the Public Use files, and questionnaire maps with details about where to look for data on various topics.

Each survey wave has its own page and includes documentation specific to it, such as questionnaires and scales documentation. We also have answers to frequently asked questions, a list of data alerts, and information about restricted data including how to gain access.

What is included in each survey?

There are interviews with both mothers and fathers at the child’s birth and again when children are ages one, three, five, and nine. 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. At Year 15, the primary caregiver (PCG) interview covers this material along with other measures previously collected in the PCG surveys. Additional components include home visits, teacher surveys, and saliva samples. 

See the questionnaires at each wave or the questionnaire maps for more details on the topics covered in the interviews. Many measures overlap with those used in other large-scale studies such as the Infant Health and Development Program (IHDP), Early Head Start, the Teenage Parent Demonstration, and the Early Childhood Longitudinal Study—Birth Cohort 2000 (ECLS-B). See the scales documentation for more details on established measures.

Here are the study components by wave.