Six articles provide an overview of the multiple approaches to evaluating the problems of homelessness and introduce the challenges of evaluating interventions for the homeless. The first part focuses on research about homelessness, and the second part describes major demonstration programs and their evaluations. (SLD)

Describes the first phase of the Urban Opportunity Program, which has studied the choices that determine lifetime opportunity for the poor and changes in the performance of urban markets and institutions that have historically supported opportunity. Characteristics of U.S. cities and future directions for the program are discussed. (SLD)