We consider 3 questions regarding the effects of economic deprivation
on child development. First, how are developmental outcomes in childho
od affected by poverty and such poverty correlates as single parenthoo
d, ethnicity, and maternal education? Second, what are the development
al consequences of the duration and timing of family economic deprivat
ion? And, third, what is the comparative influence of economic depriva
tion at the family and neighborhood level? We investigate these issues
with longitudinal data from the Infant Health and Development Program
. We find that family income and poverty status are powerful correlate
s of the cognitive development and behavior of children, even after ac
counting for other differences-in particular family structure and mate
rnal schooling-between low- and high-income families. While the durati
on of poverty matters, its timing in early childhood does not. Age-5 I
Qs are found to be higher in neighborhoods with greater concentrations
of affluent neighbors, while the prevalence of low-income neighbors a
ppears to increase the incidence of externalizing behavior problems.