Knowledge spillovers among firms are widely viewed as a key driver of agglomeration and growth, but are difficult to estimate cleanly. We randomly allocated an energy-efficient motor --- a "servo'" motor --- among leather-goods firms in Dhaka, Bangladesh, and tracked adoption, information flows,...

We compare the precision of critical values obtained under conventional sampling-based methods with those obtained using sample order statics computed through draws from a randomized counterfactual based on the null hypothesis. When based on a small number of draws (200), critical values in the...

This paper considers the problem of making inferences about the effects of a program on multiple outcomes when the assignment of treatment status is imperfectly randomized. By imperfect randomization we mean that treatment status is reassigned after an initial randomization on the basis of...

Using an RCT in middle schools in Pakistan, we test the effect of a government- implemented in-class technology and brief teacher training intervention on student achievement in grade level mathematics and science. After only 4 months of exposure, student's combined math and science score...