Evaluating the friction of distance parameter in gravity models
Evaluating the friction of distance parameter in gravity models
复制标题
评估重力模型中距离参数的摩擦力
DOI:
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发表时间:
1974
期刊:
影响因子:
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通讯作者:
J. Ord
中科院分区:
文献类型:
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作者:
A. Cliff;R. Martin;J. Ord
Cliff A. D., Martin R. L. and Ord J. K. (1974) Evaluating the friction of distance parameter in gravity models, Reg. Studies 8, 281–286. In this paper we consider whether map pattern (spatial autocorrelation) among the population values in constrained and unconstrained gravity models calibrated by least squares regression hinders interpretation of the coefficient of the distance term. It is shown that, except in certain cases which are most likely to occur in intra-, rather than inter-, urban models, no real problem of interpretation should arise. This finding differs to some extent from those of Curry (1972) and Johnston (1973). The conclusions are supported by both theoretical and empirical results.