Poverty Action LabPublication year: 2008Source publication informationJournal Title: Policy BriefcaseVolume: No. 5 Pages: 4PublisherMIT Dept of EconomicsAbdul Latif Jameel Poverty Action Lab, MIT Dept. of Economics, E60-275, 30 Memorial Drive, Cambridge, MA 02142USAwww.povertyactionlab.org Publisher reference: MIT Dept of Economics