Optimizing Experimental Site Selection for External Validity: Theory and an Application to Mobile Money in South Asia

Jonathan Morduch, Michael Gechter, Keisuke Hirano, Jean Lee, Mahreen Mahmud, Orville Mondal, Saravana Ravindran, and Abu Shonchoy
This is the first output from a large Gates-funded project on experimentation with an eye to external validity. We aim to submit it to an economics journal by the end of the summer.
Wagner Faculty