Source: See Table 2.

Notes: Heteroskedasticity-robust standard errors that allow for clustering within classrooms are in parentheses. Estimates are based on separate regressions and are the coefficient estimates for full-day Head Start participation. The dependent variable for each regression is BMI Z-score at the end of the year. The sample is restricted based on the beginning of the year weight status. Control variables used, but not reported, in all regression estimates are year dummies, the binary measures of race/ethnicity (Hispanic, non-Hispanic black, non-Hispanic black and white, other; non-Hispanic white omitted), sex, whether the child has a disability, whether there is only one parent in the family, whether the primary adult in the family graduated from high school, the primary adult’s employment status (full-time; part-time; seasonal, retired, in school, or disabled; otherwise not in the labor force or unemployed is omitted), and whether the family receives TANF, and the continuous measures of age in months at the end of the year measurement, the log of family income, and family size.