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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: J Health Econ. 2014 Mar 21;36:33–46. doi: 10.1016/j.jhealeco.2014.03.004

Table 10.

Diff-and-Diff estimates of the spillover effects of the false ID laws with scanner provisions on underage smoking and marijuana use

Full sample Male Female
Smoked
Treat −0.007 (0.015) −0.004 (0.022) −0.009 (0.022)
R2 0.105 0.113 0.116
N 39850 20219 19631
M 0.344 0.354 0.334
S.D. (0.475) (0.478) (0.472)
No. of days smoked
Treat −0.053 (0.393) −0.014 (0.495) −0.020 (0.458)
R2 0.152 0.161 0.159
N 39850 20129 19631
M 7.004 7.216 6.785
S.D. (11.914) (12.025) (11.794)
Used marijuana
Treat −0.002 (0.014) −0.004 (0.021) −0.001 (0.017)
R2 0.043 0.045 0.048
N 39810 20174 19636
M 0.181 0.203 0.158
S.D. (0.385) (0.402) (0.365)
No. of days used marijuana
Treat −0.180 (0.242) −0.344 (0.388) 0.008 (0.190)
R2 0.045 0.050 0.037
N 39810 20174 19636
M 1.993 2.564 1.404
S.D. (6.323) (7.257) (5.120)

Notes: All regressions include individual characteristics, state level controls, state, month, and year fixed effects, and state-specific linear time trend. M: Sample weighted mean of the outcome variable. S.D.: Standard deviation of the outcome variable. Standard errors, corrected for clustering at the state level, are reported in parentheses.