This paper examines the benefits and costs of training and subsidized employment provided to welfare recipients in demonstration programs in seven states. A classical experimental design is used to estimate the effect of these demonstrations on earnings and welfare benefits over 33 months...

This paper examines the benefits and costs of Job Training Partnership Act (JTPA) Title II-A programs for economically disadvantaged adults and out-of-school youths. It is based on a 21,000-person randomized experiment conducted within ongoing Title II-A programs at 16 local JTPA Service...

Background:For much of the last 40 years, the evaluation profession has been consumed in a battle over internal validity. Today, that battle has been decided. Random assignment, while still far from universal in practice, is almost universally acknowledged as the preferred method for impact...

The critical element that distinguishes classical experiments from all other modes of analysis is the random assignment of treatment to enrollees in a study. This paper examines the major methodological advantages of random assignment for the purpose of estimating the effectiveness of current...