Global: Does anti-poverty aid really work?

Governments and charities have spent billions to try to wipe out poverty, but award-winning economist Esther Duflo says we really don't know if that money has been well spent. But as a result of Duflo's pioneering work, we may be getting some answers to that question. The Massachusetts Institute of Technology professor has led the way in showing how the scientific method can be applied to determining what policies actually work.