This eye-opening book overturns the myths about what it is like to live on very little, revealing the unexpected decisions that millions of people make every day. Looking at some of the most paradoxical aspects of life below the poverty line - why the poor need to borrow in order to save, why incentives that seem effective to us may not be for them, and why, despite being more risk-taking than high financiers, they start businesses but rarely grow them - Banerjee and Duflo offer a new understanding of the surprising way the world really works.