Table 2 First-Stage Results

	(1)	(2)
January (0/1)	0.201^***	0.201^***
January (0/1)	(0.005)	(0.004)
Distance to cutoff, January	0.002^***	0.002^***
Distance to cutoff, January	(0.000)	(0.000)
Distance to cutoff, December	−0.004^***	−0.004^***
Distance to cutoff, December	(0.000)	(0.000)
Birth weight <2000 g		0.157^***
Birth weight <2000 g		(0.015)
Boy		0.178^***
Boy		(0.002)
Boy*Birth weight <2000 g		−0.079^***
Boy*Birth weight <2000 g		(0.021)
# Older siblings		−0.012^***
# Older siblings		(0.003)
Parents married/cohabiting year before birth		−0.005
Parents married/cohabiting year before birth		(0.003)
Mother’s age at birth		−0.000
Mother’s age at birth		(0.000)
Father’s age at birth		−0.002^***
Father’s age at birth		(0.000)
Constant	0.643^***	0.627^***
Constant	(0.003)	(0.008)
Observations	132,039	132,039
R²	0.113	0.154
F-statistics	5,595	2,398

↵Notes: Table shows results from linear regressions of indicators for starting school at age 7.6 instead of 6.6 for children born in December or January while conditioning on the cutoff dummy (January = 1), distance to cutoff, cohort fixed effects, and background characteristics. Standard errors in parentheses + p < 0.10, *p < 0.05, **p < 0.01, ***p < 0.001.