Abstract
The intra-urban model based on the Lösch model results in a core dominated urban place. Some of the effects that can be induced through the relaxation of the isotropic constraints are discussed. In partciular, the effects of changes in population density, varying incomes and the random choice of location by new firms are examined. The way in which the model can be viewed to take account of the duplicity of firms in the core areas is suggested. The effect of the relaxed assumptions on the shape of the threshold areas and actual market areas is discussed. In conclusion a generalised statement of what now amounts to an alternative model of the location of intra-urban tertiary activities is attempted.

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