Table 2.

Selected SIENA Parameter Estimates: Parental Knowledge and Drinking^a

	Model 1				Model 2
	b	SE	t	SD	b	SE	t	SD
Structural parameters
Outdegree (density)	−3.187	0.054	−59.00 ***	0.269	−3.188	0.054	−59.20 ***	0.268
Reciprocity	1.955	0.042	46.08 ***	0.214	1.953	0.043	45.66 ***	0.215
Transitive triplets	0.336	0.014	24.44 ***	0.070	0.335	0.014	24.00 ***	0.071
3-cycles	−0.410	0.016	−25.64 ***	0.073	−0.409	0.016	−25.22 ***	0.075
Balance	0.100	—	—	—	0.100	—	—	—
Indegree - popularity (square root)	0.178	0.010	18.49 ***	0.046	0.179	0.009	18.93 ***	0.045
Merger ego	−0.738	0.106	−6.94 ***	0.305	−0.740	0.106	−6.95 ***	0.305
Transition ego	−0.229	0.043	−5.28 ***	0.202	−0.228	0.044	−5.23 ***	0.204
Selection parameters
Alter effects: Who is more often named as a friend?
Parental knowledge	−0.008	0.004	−1.81 †	0.009	−0.008	0.004	−1.85 †	0.008
Drinking	0.086	0.010	8.47 ***	0.023	0.083	0.010	8.71 ***	0.015
Sex	0.015	0.007	1.97 †	0.021	0.016	0.007	2.25 *	0.019
Race	−0.074	0.011	−6.71 ***	0.045	−0.074	0.011	−6.71 ***	0.045
Ego effects: Who names more friends?
Parental knowledge	0.039	0.007	5.17 ***	0.038	0.039	0.007	5.28 ***	0.038
Drinking	−0.008	0.020	−0.42	0.082	−0.015	0.019	−0.77	0.077
Sex	−0.133	0.018	−7.53 ***	0.083	−0.133	0.018	−7.52 ***	0.085
Race	−0.055	0.015	−3.70 **	0.056	−0.056	0.015	−3.68 **	0.059
Similarity effects: Choosing friends similar to oneself
Parental knowledge	0.196	0.027	7.40 ***	0.106	0.199	0.027	7.40 ***	0.103
Drinking	0.290	0.022	13.22 ***	0.007	0.281	0.021	13.27 ***	0.007
Sex	0.722	0.024	30.17 ***	0.128	0.723	0.024	30.22 ***	0.128
Race	0.178	0.024	7.50 ***	0.115	0.178	0.024	7.52 ***	0.115
Behavioral parameters: Influence on Drinking
Friends’ attributes
Mean Parental knowledge	−0.410	0.054	−7.62 ***	0.019	−0.221	0.064	−3.45 **	0.015
Drinking mean similarity	—	—	—	—	1.186	0.102	11.69 ***	0.021
Control variables (individual level)
Parental knowledge	−0.116	0.013	−8.94 ***	0.007	−0.115	0.013	−8.77 ***	0.005
Sex	−0.169	0.019	−8.68 ***	0.029	−0.155	0.016	−9.60 ***	0.003
Race	−0.013	0.026	−0.50	0.053	−0.005	0.026	−0.18	0.048
Both Biological Parents	−0.037	0.018	−2.02 †	0.012	−0.040	0.019	−2.09 *	0.018
School Adjustment & Bonding	−0.183	0.011	−16.03 ***	0.005	−0.181	0.012	−14.98 ***	0.005
Risk & Sensation Seeking	0.141	0.010	13.72 ***	0.027	0.139	0.010	14.19 ***	0.004

^***p < .001.

^**p < .01.

^*p < .05.

^†p < .10.

All values are means across 48 networks, with a total N of 43,299 person/waves

^aModels also include rate and shape parameters (estimates available in the supplementary materials)