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

John Tropea - Delicious Social Network

In many ways, human beings behave like flocks of birds or schools of fish," says Nicholas Christakis, a physician and Harvard University sociologist who is co-author of a new book, Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives , out today. "So Papers co-written by economist Jason Fletcher, an assistant professor at the Yale University School of Public Health in New Haven, Conn.,