Book excerpt: Affords a comprehensive overview of evaluative research, answering questions regarding the adequacy of organized programs in health, justice, education, employment, and welfare. Included are general statements about evaluative research, discussing the nature of the evaluative task, the role of evaluative research in programs for change, and appropriate methodological strategies. In this revised and expanded collection of readings, which includes more case materials and more illustrations of completed evaluations than the first edition, the editor presents a variety of viewpoints and a broad range of materials for the social planner, administrator, and social scientist.