Table 3 —

E-cigarette MLSA Law and Youth Smoking at Different Margins

National and State YRBSS: 2005–2015

	DV: Youth is a regular smoker			DV: Youth is a heavy smoker
Panel A	1	2	3	4	5	6
E-cigarette MLSA Law	0.007**	0.010**	0.008**	0.008***	0.010**	0.009***
	(0.003)	(0.005)	(0.003)	(0.003)	(0.004)	(0.003)
Panel B	4	5	6	4	5	6
E-cigarette MLSA ≤2 Waves Pre	−0.005	−0.005	−0.004	−0.003	−0.003	−0.002
	(0.003)	(0.006)	(0.003)	(0.002)	(0.004)	(0.003)
E-cigarette MLSA 1 Wave Pre (Ref.)	–	–	–	–	–	–
E-cigarette MLSA Wave of Implementation	0.007**	0.012*	0.010**	0.007***	0.011**	0.010***
	(0.003)	(0.006)	(0.005)	(0.002)	(0.005)	(0.004)
E-cigarette MLSA ≥1 Wave Post	0.025***	0.011	0.019	0.022***	0.010	0.016*
	(0.004)	(0.009)	(0.012)	(0.003)	(0.007)	(0.010)
Full Controls	✓	✓	✓	✓	✓	✓
State FEs	✓	✓	✓	✓	✓	✓
Year FEs	✓	✓	✓	✓	✓	✓
State-specific linear pre-trends		✓			✓
State-specific linear trends			✓			✓
Mean of dep. var. in the control states	0.05	0.05	0.05	0.04	0.04	0.04
Observations	752,332	752,332	752,332	752,332	752,332	752,332

Notes: Standard errors, clustered at the state level, are shown in parentheses.

^*p < 0.10

^**p < 0.05

^***p < 0.01

All models include dummy variables for gender, race, age, and grade levels. State-level covariates listed in Table 1 are included.

In columns 1–3, we define youth as regular smokers if they smoked cigarettes at least 20 days over the past month.

In columns 4–6, we define youth as heavy smokers if they smoked cigarettes every day over the past month.

The analysis sample is restricted to youth younger than 18.

E-cigarette MLSA law, the leads, and the lags are defined in the text. One wave means one survey year.