NEW YORK: Consumers are more frequently basing their buying decisions on information gleaned from shopping Web sites, blogs, and social networking sites, according to a study by Ketchum and the University of Southern California's Annenberg Strategic PR Center. At the same time, local and national television news broadcasts are losing their clout with consumers, the study found.

Not only are people using commercial shopping sites more - the figure has more than doubled since its 2006 study - but ...