Interdisciplinary collaboration in the social sciences is obviously essential to scientifi c progress, but discontent and practical diffi culties hinder collaboration in research and training. Many of the problems arise from the failure in the separate disciplines to understand the basis on which collaboration is necessary and possible. In an eff ort to shed light on the situation, these original essays by eminent scholars-economists, geographers, psychologists, political scientists, sociologists, anthropologists, and others-demonstrate eff ective means of achieving interdisciplinary coordination in studying human behavior and delineating promising areas-for cooperative research. Th e book provides a sophisticated guide to the nature of knowledge in social science as applied to its core disciplines.