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Spatial flows and spatial patterns

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  • A S Fotheringham
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    Abstract

    The misspecification of gravity spatial interaction models has recently been described by the author. The bias in parameter estimates that results from such misspecification appears to produce the 'map pattern effect' or 'spatial structure bias' in estimated distance-decay parameters. A further aspect of the misspecification bias in gravity parameter estimates is explored here. The severity of the bias is shown to vary in a predictable manner with variations in spatial structure. In particular, the bias is shown to be dependent upon the pattern of accessibility that exists with a spatial system. The relevant aspects of this pattern are discussed for intraurban and interurban (or interregional) flow matrices. It is shown that from an examination of the spatial structure of centres in a spatial system it is possible, a priori, to identify whether significant bias will arise in the calibration of a gravity model. Certain configurations of centres are shown theoretically to produce maximal bias. The author thus answers the question, "why do gravity parameter estimates appear to be biased in some systems but not in others?"

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    Bibliographic Info

    Article provided by Pion Ltd, London in its journal Environment and Planning A.

    Volume (Year): 16 (1984)
    Issue (Month): 4 (April)
    Pages: 529-543

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    Handle: RePEc:pio:envira:v:16:y:1984:i:4:p:529-543

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    Web page: http://www.pion.co.uk

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    Cited by:
    1. Gitlesen, Jens Petter & Thorsen, Inge, 1999. "An Empirical Evaluation of how commuting flows respond to new road connections and Toll Charges," ERSA conference papers ersa99pa107, European Regional Science Association.
    2. Matteo Lippi Bruni & Lucia Nobilio & Cristina Ugolini, 2008. "The analysis of a cardiological network in a regulated setting: a spatial interaction approach," Health Economics, John Wiley & Sons, Ltd., vol. 17(2), pages 221-233.
    3. Gitlesen, Jens Petter & Thorsen, Inge & Ub√łe, Jan, 2004. "Misspecifications due to aggregation of data in models for journeys-to-work," Discussion Papers 2004/13, Department of Business and Management Science, Norwegian School of Economics.
    4. Felipa Mello Sampayo, 2006. "The Geographic Distribution of Economic Activities of the USA Multinational Enterprises," DEGIT Conference Papers c011_040, DEGIT, Dynamics, Economic Growth, and International Trade.
    5. Aura Reggiani & Pietro Bucci & Giovanni Russo & Anette Haas & Peter Nijkamp, 2011. "Regional Labour Markets and Job Accessibility in City Network Systems in Germany," Tinbergen Institute Discussion Papers 11-104/3, Tinbergen Institute.
    6. Aura Reggiani & Pietro Bucci & Giovanni Russo & Anette Haas & Peter Nijkamp, 2011. "Regional Labour Markets and Job Accessibility in City Network Systems in Germany," Tinbergen Institute Discussion Papers 11-104/3, Tinbergen Institute.

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