Interest in human settlement systems and policies has been a critical part of urban-related work at IIASA since its inception. During the past three years this interest has given rise to a concentrated research activity focusing on migration dynamics and settlement patterns. Four sub-tasks have formed the core of this research effort: (1) the study of spatial population dynamics; (2) the definition and elaboration of a new research area called demometrics and its application to migration analysis analysis and spatial population forecasting; (3) the analysis and design of migration and settlement policy; and (4) a comparative study of national migration and settlement patterns and policies. This report brings together four articles that...