Table 1.

Descriptive Statistics

VARIABLES	Sample L†		Sample M†
	Mean	Std. Dev.	Mean	Std. Dev.
Any alcohol-impaired driving episode next year	0.36	0.48	0.57	0.50
Number of alcohol-impaired driving episodes next year	1.06	1.82	1.77	2.15
Legal Consequences of DWI: 2nd Person
Apprehension probability when driving impaired			0.18	0.20
Fine ($100)			9.07	11.22
Jail (weeks)			1.85	6.89
License suspension/revocation (months)			9.85	54.74
SCRAM device (months)			4.12	7.19
Legal Consequences of DWI: 3rd Person
Apprehension probability when driving impaired	0.10	0.14	0.09	0.13
Fine ($100)	9.02	11.11	9.77	12.24
Jail (weeks)	2.52	13.57	2.34	15.70
License suspension/revocation (months)	10.52	84.07	12.02	114.24
SCRAM device (months)	4.40	7.69	4.21	5.86
Extralegal Consequences of DWI
Increase in accident probability when driving impaired	0.53	0.42	0.43	0.38
Demographics
Age	43.20	12.67	41.36	11.86
Female	0.56	0.50	0.46	0.50
Non-white	0.17	0.37	0.14	0.35
Married	0.46	0.50	0.42	0.49
Education (years)	15.66	1.91	15.60	1.91
Household income ($1,000)	78.72	63.06	77.43	62.02
Risk-Taking Behaviors
Expected speeding apprehension probability	0.09	0.14	0.11	0.15
Hard drug user	0.13	0.34	0.19	0.39
Alcohol addiction
CAGE<2	0.63	0.48	0.56	0.50
CAGE=2	0.21	0.41	0.26	0.44
CAGE=3/4	0.16	0.36	0.18	0.39
Optimism bias
Self-Assessed better driver	0.74	0.44	0.73	0.45
Decision-making
Cognition index	12.02	1.26	12.01	1.25
Lack self-control	0.10	0.29	0.14	0.35
Impulsivity index	29.54	6.57	30.48	6.79
Observations	1,079		537

^**p<0.01,

^*p<0.05

^†Sample L is comprised of all SAD respondents. Sample M is a subsample of SAD respondents who estimated a non-zero probability that they would be pulled over for suspected DWI in the year between survey waves.

Abbreviations: Driving While Intoxicated = DWI, CAGE Questionnaire = CAGE, Secure Continous Remote Alcohol Monitoring = SCRAM.