A Dynamic Model of Urban Structure.

by John P. Crecine

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A description of the latest version of the Time-Oriented Metropolitan Model (TOMM). The model depicts the interaction of variables in an urban system. Three classes of variables are included: an exogenous employment sector, an endogenous commercial employment sector, and a household or population sector. The city is divided into a disjoint and exhaustive set of areal units in which variables are located spatially. Superimposed is a transportational system providing accessibilities between various activities within the area units. In the formal model of TOMM, the number of areal units is variable and in practice would generally be determined by characteristics of the urban area involved and data availability. 61 pp.

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