Table 2.

Social network structures among VPLC participating providers

Who are providers likely to contact: “How likely would you be to contact each of the other providers in the VPLC to ask for help with an issue about EBP implementation?”
	Time
	1	2	3	4	5	6
VPLC1
Densitya	0.49	0.57	0.64	0.59	0.60	0.61
B. Densityb	0.34	0.46	0.56	0.46	0.46	0.53
VPLC2
Density	0.75	0.83	0.78	0.75	0.83	0.75
B. Density	0.68	0.77	0.71	0.68	0.81	0.68
Who do providers contact: “How many times have you talked to the other providers in the last month, outside of the VPLC?”
	Time
	1	2	3	4	5	6
VPLC1
Density	0.31	0.24	0.36	0.23	0.23	0.46
B. Density	0.14	0.06	0.19	0.04	0.03	0.31
VPLC2
Density	0.35	0.41	0.33	0.35	0.17	0.35
B. Density	0.16	0.23	0.14	0.16	0.00	0.16

^aProportion of all possible ties in social network;

^bBoundary density: proportion of all possible cross-agency ties in social network