Categorical Data and Choice Analysis in a Spatial Context.- Optimization Models.- A Combined Linear/Non-Linear Programming Model for Employment, Transportation, and Housing in an Urban Economy.- An Optimum Economic/Energy Land-Use Transportation Model.- Information Flows and Decision-Making in Urban Models.- Conflict, Inertia, and Adaptive Learning in Urban Systems Modelling.- Spatial Interaction.- On Household Travel Circuit Benefits and Their Locational Implications.- A Stochastic Multi-stage Mobility Choice Model.- On the Sensitivity of Maximum Likelihood Estimates of Gravity Model Parameters.- Prior Structure and Spatial Interaction.- Interdependence Relations in Interaction Data: An Analysis of the Structure of the Nigerian Economy.- Discrete Choice.- Random Utility Models of Spatial Choice.- The Application of an Elimination-by-Aspects Model to Urban Location Decisions.- Residential Mobility with a Probit Model.- Modal Choice Modelling for Several Alternatives: Application of Disaggregate Demand Models in Santiago, Chile.- Choice of Urban Transport Modes for Work Trips.- Geographic Transfer of Travel Choice Models: Evaluation and Procedures.- Discrete Analysis.- Housing Affordability: A Regional Perspective.- Forecasting the Long Term Effects of Increases in the Cost of Travel.- Contingency Table Analysis and Urban Travel Accounts.- Transport Impacts of Changing Household Structure.

'l'he papers contained in this volume were originally presented at the International symposium on New Directions in Urban Systems Modelling held at the University of Waterloo in July, 1983. The papers have been reviewed and rewritten since that time. The exception is the introductory paper written specially by Manfred Fischer and Peter Nijkamp as an introduction to this volume. The manuscript was prepared in the word processing unit in the nepartment of Civil Engineering, university of Waterloo. The sustained work of Mrs. I. Steffler in preparing this manuscript is gratefully acknowledged. "'r. R. K. Kumar provided excellent assistance with the editorial process. The svrnposium and the preparation of this manuscript were supporteö financially by the Natural Sciences and Engineering Research Council of Canada, The Academic Development Fund and the Department of Civil Engineering, TTniversity of waterloo. TABLE OF CONTENTS PREFACE .................................................................. III Categorical Data and Choice Analysis in a Spatial Context Manfred Fischer and Peter Nijkamp ........................................