Table A1.

Description of outcome variables and summary statistics

Outcome	N	Mean	S.D.	Description
Consumed alcohol	40315	0.477	0.499	=1 if the respondent consumed alcohol at least once in the past month, =0 otherwise.
Engaged in binge drinking	40249	0.276	0.447	=1 if the respondent consumed 5 or more drinks at least in one day in the past month, =0 otherwise.
No. of days consumed alcohol	40315	2.731	5.021	Number of days that the respondent consumed alcohol in the past month.
No. of days engaged in binge drinking	40249	1.283	3.308	Number of days that the respondent consumed 5 or more drinks in the past month.
Avg. no. of drinks consumed	40034	0.542	1.553	Average number of drinks consumed per day calculated as “No. of days consumed alcohol” multiplied by the number of drinks that the respondent consumed on the days she actually consumed alcohol and divided by 30.
Smoked	40349	0.345	0.475	=1 if the respondent smoked at least once in the past month, =0 otherwise.
No. of days smoked	40349	7.027	11.927	Number of days that the respondent smoked in the past month.
Used marijuana	40308	0.181	0.385	=1 if the respondent used marijuana at least once in the past month, =0 otherwise.
No. of days used marijuana	40308	1.997	6.334	Number of days that the respondent used marijuana in the past month.

Notes: Sample weighted means of the outcome variables are reported. S.D.: Standard deviation.