How ‘microtargeting’ works in political advertising

Aired: 2/18/2014 | 0:07:50 | Clip
What you watch, read, buy and listen to online can tell political campaigns whether it’s worth their time and money to woo your vote. Gwen Ifill talks to Ken Goldstein of the University of San Francisco and Eitan Hersh of Yale University to learn more about how our digital footprints are being used in the evolution of political advertising.