Epinions
This is the bipartite rating network of Epinions, an online product rating
site. The nodes of the network are users and products, and each edge connects
a user with a product and represents a rating. The weight of the edge is the
rating value.
Metadata
Statistics
Size  n =  876,252

Left size  n_{1} =  120,492

Right size  n_{2} =  755,760

Volume  m =  13,668,320

Wedge count  s =  69,245,866,714

Claw count  z =  1,092,042,207,526,800

Cross count  x =  3.159 88 × 10^{19}

Square count  q =  170,303,771,005

4Tour count  T_{4} =  1,639,442,650,152

Maximum degree  d_{max} =  162,169

Maximum left degree  d_{1max} =  162,169

Maximum right degree  d_{2max} =  1,195

Average degree  d =  31.197 2

Average left degree  d_{1} =  113.438

Average right degree  d_{2} =  18.085 5

Fill  p =  0.000 150 097

Size of LCC  N =  875,502

Diameter  δ =  12

50Percentile effective diameter  δ_{0.5} =  3.430 78

90Percentile effective diameter  δ_{0.9} =  3.994 56

Median distance  δ_{M} =  4

Mean distance  δ_{m} =  3.808 04

Gini coefficient  G =  0.769 429

Balanced inequality ratio  P =  0.197 498

Left balanced inequality ratio  P_{1} =  0.071 153 4

Right balanced inequality ratio  P_{2} =  0.270 834

Relative edge distribution entropy  H_{er} =  0.828 524

Power law exponent  γ =  1.465 77

Tail power law exponent  γ_{t} =  1.951 00

Degree assortativity  ρ =  −0.042 132 4

Degree assortativity pvalue  p_{ρ} =  0.000 00

Spectral norm  α =  245.159

Spectral separation  λ_{1}[A] / λ_{2}[A] =  1.252 46

Negativity  ζ =  0.228 368

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References
[1]

Jérôme Kunegis.
KONECT – The Koblenz Network Collection.
In Proc. Int. Conf. on World Wide Web Companion, pages
1343–1350, 2013.
[ http ]

[2]

Paolo Massa and Paolo Avesani.
Controversial users demand local trust metrics: an experimental study
on epinions.com community.
In Proc. American Association for Artif. Intell. Conf., pages
121–126, 2005.
