Appendix Table 3:

Underage Teen Births, Cross Sectional, DD

	(1)	(2)	(3)
	Urban	Suburban	Rural
ENDS MLSA	4.9565*	0.3008**	0.0192
	(1.8595)	(0.1125)	(0.0215)
Obs	3,310	32,363	32,541
MLSA Law Mean	0.423	0.341	0.269
Dep. Var. Mean	36.740	4.873	1.631
Adjusted R^2	0.941	0.862	0.338
# Clusters	46	654	1298
Alt. Cluster p-value	0.008	0.007	0.377
Alt. # Clusters	38	288	486

Standard errors in parentheses

County-by-year/month counts of women giving birth <18 years of age that were conceived between 1/1/2010 and 1/1/2016. Controlling for female population 14–17 years of age, cigarette taxes at point of gestation, cigarette and ENDS indoor air laws in bars, private workplaces, and restaurants, month-year of gestation, and county. Standard errors are clustered at the level of county, and alternative p-values are provided for clustering at the level of health service area.

⁺p < 0.1,

^*p < 0.05,

^**p < 0.01,

^***p < 0.001