We propose a method for estimating the mean impact of an assigned social program when it is not feasible to do a pre-intervention baseline survey but it is feasible to track ex-participants. In our triple-difference estimator, measured outcome changes are compared between continuing participants...

Argentina's Proempleo Experiment, conducted in 1998-2000, was designed to assess whether a wage subsidy and specialized training could assist the transition from workfare to regular work. Randomly sampled workfare participants in a welfare-dependent urban area were given a voucher that entitled...