using the same covariates as for the whole sample. In the majority of pre-treatment variables the difference between covariates
was non-significant (p > 0.01). These analyses provide information
on which children benefit the most from ECCE programs and how
effective these programs are in reducing cognitive gaps, especially
for children from low and middle-low income groups. Children
from the middle-low SES group, followed by those from the middle
SES group, seem to benefit the most from ECCE programs, according to difference in means analyses done for the matched sample
as well as the adjusted-regression analyses.