Paul Revere was a Connector. But he was also—and this is the second of the three kinds of people who control word-of-mouth epidemics—a Maven. The word Maven comes from the Yiddish, and it means one who accumulates knowledge. In recent years, economists have spent a great deal of time studying Mavens, for the obvious reason that if marketplaces depend on information, the people with the most information must be the most important.