Alonso's Theory of Movements : Developments in Spatial Interaction Modeling

The Spatial Interaction Model proposed by Alonso as “Theory of Movements” offers an innovative specification of spatial origin-destination flow models. Equations for flows between regions, total outflow from and total inflow to a region are linked by balancing factors. This paper presents a consistent formulation of Spatial Interaction Models in the Wilson tradition and Alonso's Theory of Movements. The paper is intended as an introduction to the model and a review of the state of the art. Besides it is argued that simultaneous equation techniques are required to estimate the so-called systemic parameters