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Table 7 Comparison of average common connected nodes between neighbors on a referral path and the expectation in a random network with the same size

From: Referral paths in the U.S. physician network

Year 2006 2007 2008 2009 2010 2011
Random network 3.60E−03 3.10E−03 3.00E−03 2.90E−03 2.80E−03 2.80E−03
Referral network 25.13 24.64 24.95 24.97 24.95 24.96