Before revision:  We go on to propose a feasible estimator that is consistent and asymptotically normal as the number and size of groups increases  .
After revision:  We go on to propose a feasible estimator that is consistent and asymptotically normal as the number and size of groups increases . We apply our estimator to data from a large-scale job placement services experiment, and find negative indirect treatment effects on the likelihood of employment for those willing to take up the program. These negative spillovers are offset by positive direct treatment effects from own take-up .