Once treated with scorn, randomised control trials are coming of age
Dec 14th 2013 | From the print edition
IT ALL began with a white envelope. Inside, a letter from the provost of the Massachusetts Institute of Technology offered three young economists at MIT $100,000 to spend as they wanted (those were the days). Two of them, Esther Duflo and Abhijit Banerjee, used the money to set up an organisation to run “randomised control trials” (RCTs), an experimental technique a bit like drugs trials, but for economics. To test if, say, boosting teachers’ pay improved educational outcomes, an RCT would take a collection of comparable schools, randomly assign higher wages to some teachers but not others, and see what happens. The organisation, called J-PAL (to give it its full title, the Abdul Latif Jameel Poverty Action Lab), has just celebrated its tenth anniversary. Its methods have transformed development economics. Read more of this post