Every year, nine million children under five die from preventable diseases such as diarrhea and malaria. Often, the treatments for these diseases are cheap, safe, and readily available. So why don't people pick these 'low-hanging fruit'? Why don’t mothers vaccinate their children? Why don’t families use bednets, or buy chlorinated water? And why do they spend such large amounts of money on ineffective cure instead?Poor Economics is a book and website by Abhijit V. Banerjee and Esther Duflo. It has maps, graphs, and data drawn from the research at MIT's Poverty Action Lab. It is currently being reviewed and discussed (1, 2, 3) at the Economist. BONUS: Duflo discusses the book and Randomized Controlled Trials (Wikipedia: RCT).