STRUCTURAL SPATIAL INTERACTION

This paper identifies a concept of structural spatial interaction. Alt hough it is defined differently from its counterpart of structural une mployment in economics, it attempts to define a similar idea. In econo mics, the focus is on equilibrium in the supply and demand of labor. I n this paper structural interaction is that which minimizes aggregate distance travelled, subject to constraints on origins and destinations . The structural interaction model produces an equilibrium, therefore, in the supply and demand of movers, while identifying a spatially eff icient trip distribution. It is portrayed as a type of relaxed interac tion model and is illustrated using an example of structural migration with Canadian interprovincial migration data.