The Office of Planning, Research, and Evaluation (OPRE) within the Administration for Children and Families (ACF) in the Department of Health and Human Services (HHS) plans to award up to ten cooperative agreements to fund research to conduct secondary data analysis of archived data, specifically the Building Strong Families (BSF), Supporting Healthy Marriage (SHM), and Parents and Children Together (PACT) datasets. These datasets are from large-scale federal evaluation impact studies, which addressed questions related to healthy marriage and/or responsible fatherhood. Successful applicants will demonstrate a familiarity with the proposed data for their analysis and an adequate understanding of the variables, sampling, methodology, etc. used to construct the dataset necessary for completion of the work proposed in the application. Proposed research should address topics relevant to strengthening families to improve the lives of children and parents, as well as promote economic stability. Topics of interest include, but may not be limited to the following: mediators of healthy marriage, relationship education, and/or fatherhood programs; measurement issues related to healthy marriage, relationship education, and/or fatherhood programs with low-income families; or father involvement in low-income families. .