An important decision that must be made in operating training programs targeted toward disadvantaged workers is whether the programs dictate the specific training programs that participants will take or they issue vouchers that permit participants to select their specific training programs. Over...

It is widely agreed that randomized controlled trials - social experiments - are the gold standard for evaluating social programs. There are, however, many important issues that cannot be tested using social experiments, and often things go wrong when conducting social experiments. This paper...

When evaluating a pilot or demonstration program, there are risks from drawing inferences from a single test. This paper reviews the experiences of replication efforts from demonstrations using randomized controlled trials in the initial evaluation and the replications. Although replications of...