Lending to the poor is expensive due to high screening, monitoring, and enforcement costs. Group lending advocates believe lenders overcome this by harnessing social connections. Using data from FINCA-Peru, I exploit a quasi-random group formation process to find evidence of peers successfully...

Thinking like an economist -- The power of economics -- Economics and life -- Specialization and exchange -- Supply and demand -- Markets -- Elasticity -- Efficiency -- Government intervention -- Microeconomics : thinking like a microeconomist -- Individual decisions -- Consumer behavior --...