Table 2.

Results from the final models for commercial access and shoulder tap

	Commercial Access				Shoulder Tap
	Likelihood of Use		Frequency of Use		Likelihood of Use		Frequency of Use
Effects	Fixed	Random	Fixed	Random	Fixed	Random	Fixed	Random
	Coeff.	Variance	Coeff.	Variance	Coeff.	Variance	Coeff.	Variance
Level-1, within-person change		--------a		0.1247		--------a		0.1183
Perceived parent drinking	0.0079		-0.1138		0.0928		-0.0447
Perceived peer drinking	0.0618‡		0.0780*		0.0550‡		0.0505*
Associations with of-age peers	-0.0491		-0.6603		-0.3323		-0.5950
Personal income	0.0050		-0.1691		0.0010		0.0802
Level-2, between-person variation
Initial level		0.8355		9.9362‡		1.4259		7.6568‡
Age	0.5377*		0.5937*		0.5469†		0.7022‡
Male	0.3752		0.7144		0.2413		0.4858
Mean perceived parent drinking	-0.0177		-0.0063		0.0049		-0.0005
Mean perceived peer drinking	0.1565‡		0.2006‡		0.1776‡		0.2334‡
Mean associations with of-age peers	0.5270		0.6746		0.6129		0.6441
Mean personal income	0.1276*		0.2058†		0.0371		0.0811
Growth rate		--------b		3.4466‡		--------b		2.3065‡
Age	-0.1271		-0.1202		-0.3334†		-0.4608‡
Male	0.2058		0.1122		0.1078		0.0539
Level-3, between-zip code variation
Initial level		0.1418		0.1326		0.0382		0.1297
Alcohol outlet density	0.0013‡		0.0024‡		0.0010†		0.0011*
Median household income	-0.0056		-0.0006		-0.0023		-0.0093
Growth rate		0.0318		--------b		0.0051		0.0154
Alcohol outlet density	-0.0000		-0.0005*		-0.0004		-0.0004
Median household income	0.0073*		0.0057		-0.0034		-0.0008

^aNote. The level-1 variance in the Bernoulli model is heteroscedastic and equals 1/p(1-p) where p is the predicted probability according to the level-1 model.

^bFor the model to converge, the variance of this outcome variable was set to 0.

^*p < .05,

^†p < .01,

^‡p < .001.