Abhijit Banerjee of MIT talks with EconTalk host Russ Roberts about Banerjee's book (co-authored with Esther Duflo), Poor Economics. The conversation begins with how randomized control trials (a particular kind of social experiment) have been used to measure the effectiveness of various types of aid to the poor. Banerjee goes on to discuss hunger, health, and education--the challenges in each area and what we have learned about what works and what does not. The conversation closes with a discussion of the role of the labor market in the private sector.