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the reviewers who link them and little else are more likely to be domain
specialists than the effusive reviewers on the periphery. The opinions of
domain specialists, most like mavens in Gladwell's social lexicon, may be
particularly influential. As potential connectors, the effusive reviewers that
bridge communities are also interesting because they suggest areas of
cross-domain appeal.
Figure 2-8: Graphs can be used to visualize product communities, linked
here by co-purchase and co-review. Symbols reflect class of product.
For advertising purposes, however, what are more immediately relevant
than hints of influence in this case are the clusters of other products that are
 
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