Mark Jeffery's comparison between Paul Revere and William Dawes rides exemplifies the idea of social networks. Most people heard of Revere's, but few know Dawes' role. Dawes had a closed network, while Revere's network was open, he said. A cluster analysis shows the support of the networks, as well as from social, display and search.
Laurie Sullivan is a writer and editor for MediaPost. You can reach Laurie at firstname.lastname@example.org.