The systemic variables and elasticities in Alonso's general,theory of movement

This paper explores the theoretical underpinnings of interregional movement models generalized by William Alonso focusing on the systemic effects of origin supply conditions and destination demand conditions. It is found that although Alonso's theory is logically consistent in terms of regional aggregation and interregional migration accounts, in practice the elasticity estimation of the systemic variables is problematic. Unless the affinity term is broadly defined, the trends in the ratio of interregional to intraregional affinities, cast suspicion on the family of spatial interaction models because of the inseparability of distance from origin and destination characteristics, and spatial autocorrelation problem.