In this paper, I review the issues confronted in designing the U.S. National Job Training Partnership Act (JTPA) Study, discuss how these issues were dealt with and assess the efficacy of the final design in evaluating the JTPA system and in resolving the inconclusiveness of past evaluations of...

This paper presents a simple model to contrast the benefit and cost of renovating public housing units against the benefit and cost of building new ones. Benefit is measured as the additional expected life created, and empirically-estimated survivor functions for housing are used to calculate...