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Calibration Procedures and Problems of Stability in Nonlinear Dynamic Spatial Interaction Modeling

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  • S T Lombardo

    (Dipartimento di Pianificazione Territoriale e Urbanistica, Università di Roma, 00191 Roma, Italy)

  • G A Rabino

    (Istituto Ricerche Economico Sociali del Piemonte, Via Bogino 21, 10123 Torino, Italy)

Abstract

The use of nonlinear dynamic spatial interaction models is one of the main approaches for the treatment of those phenomena of discontinuity and irreversibility which characterise the complexity of urban evolution. In this paper some methodological and operational problems which arise when a model of this kind, namely the Harris and Wilson model, is calibrated are dealt with. The main aspect of the calibration dealt with here is the problem of the separability of dynamics with different speeds (such as dynamics of stocks and dynamics of activities) when suitable data are lacking. It is shown, among other things, that a fundamental role is played by the intrinsic stability (or instability) of the equilibria of the model. The argument is illustrated by a set of simulations carried out on the Rome metropolitan area, relating to the retailing sector.

Suggested Citation

  • S T Lombardo & G A Rabino, 1986. "Calibration Procedures and Problems of Stability in Nonlinear Dynamic Spatial Interaction Modeling," Environment and Planning A, , vol. 18(3), pages 341-350, March.
    • Handle: RePEc:sae:envira:v:18:y:1986:i:3:p:341-350
    DOI: 10.1068/a180341
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    References listed on IDEAS

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    1. Rijk, F. J. A. & Vorst, A. C. F., 1983. "Equilibrium points in an urban retail model and their connection with dynamical systems," Regional Science and Urban Economics, Elsevier, vol. 13(3), pages 383-399, August.
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