I have just finished reading Poor Economics, a book by Abhijit V. Banerjee and Esther Duflo (both professors of Economics at MIT).* It brings into a sharp perspective the complex economic lives of the poor and the failure of some anti-poverty policies. It also brings up several creative studies, including some that have used randomized controlled trials. It's a really good reading!
There is a website of the book where you can have a glimpse of it and explore interactive charts. Or, you may watch a short presentantion by Esther Duflo:
*Thank you Lucas Mation for the gift!