“…All models controlled for the same full set of parent and child covariates that were originally included in the final report of the Head Start Impact Study (Puma et al, ): child race, child gender, child age, child disability or special‐needs status, maternal education, maternal marital status, two‐parent household at birth, teenage mother status, caregiver age, maternal nativity, home language, week of first parent interview, and number of weeks elapsed between parent interviews. To further adjust for any departures from randomization, we included additional variables that have been found to contribute to parenting behavior (Ansari & Crosnoe, ; Gershoff et al, ; Mistry et al, ), namely, maternal employment, number of children in the household, hours of care per week in the focal arrangement, residential instability, and children's behavior problems (Child Behavior Checklist; Achenbach, ) and literacy skills (Peabody Picture Vocabulary Test; Dunn & Dunn, ) at baseline (fall 2002). Because parents were not (and indeed could not be) randomly assigned to the initial parenting groupings, we utilized this extensive set of covariates to provide greater precision in our models.…”