Rejoinder to Casetti's "Critical notes on an alleged operationalization of the concept of spatial utility".

The article presents the authors' response in reply to the criticism of their paper--"On Place Utility and the Normative Allocation of Intraurban Migrants," previously published in a 1970 issue of the journal "Demography." In the paper, a linear programming model of intraurban migration was presented. This model was designed to operationalize concepts put forth in earlier conceptual models. The interpretation of the dual variables of this model proved to be interesting in that it linked household aspiration and search behaviors to place utility, a concept that has received much attention in the intraurban migration literature but has proved difficult to operationalize. They say that the critic objects to this work on two accounts, the more noteworthy of which concerns the interpretation of the model's dual variables as place utilities. This needs to be examined more closely since the model is a useful and informative one.