Millimet, Daniel L.; Tchernis, Rusty; Husain, Muna - Institute for the Study of Labor (IZA) - 2008
and NSLP
must be independent, conditional on x, of unobservables that impact child health without participating,
u0, and …)
where the child attributes, x, are time invariant, but the e�ects of these attributes are allowed to vary over
time. First … participation in the SBP or NSLP, conditional on x, is uncorrelated with changes …