Part 1 focuses on location models and embraces a series of classic survey papers as well as a number of more specific contributions covering such topics as the distribution of residential activities. This is followed in part 2 by papers concerned with spatial interaction and, in particular the gravity model. Part 3 of the collection contains papers on micro-macro models that look at ways of moving from individual to collective behavior, whilst part 4 is concerned with dynamic models. Part 5 of the volume reflects an increasing interest in the role of various networks in the formulation of plans, and finally part 6 completes the volume with a selection of policy-planning models.