'Flocking' behavior lands on social networking sites - USATODAY.com

John Tropea - Delicious Social Network

Whether theyre face-to-face or virtual, social networks influence human behavior and shape everything from finances to the way people vote, say Christakis and co-author James Fowler, a social scientist at the University of California-San Diego. The study of 1,178 adults ages 25 to 74 is based on data collected at the Center for the Digital Future at the University of Southern California in 2002 and 2007.