Table 2.

First Stage Regression Estimates of Junk Food Availability in Fifth Grade

	Junk Food Availability
Combined school attendance	0.195**
	[0.041]
Partial R-square of excluded instruments	0.02
F-statistic on excluded instruments	22.7; p=0.000
Observations	9380

Notes: Figures in brackets are robust standard errors clustered at the school level. Other covariates in the model include male, age (months), male*age, race/ethnicity, kindergarten BMI, mother’s education, income, private school dummy, categories for percent minority in school and school enrollment, and state and urbanicity dummies.

⁺significant at 10%;

^*significant at 5%;

^**significant at 1%.