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A Test for Spatial Autocorrelation in Choropleth Maps Based upon a Modified X2 Statistic

A. D. Cliff, R. L. Martin and J. K. Ord
Transactions of the Institute of British Geographers
No. 65 (Jul., 1975), pp. 109-129
DOI: 10.2307/621612
Stable URL: http://www.jstor.org/stable/621612
Page Count: 21
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A Test for Spatial Autocorrelation in Choropleth Maps Based upon a Modified X2 Statistic
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Abstract

An X2 goodness-of-fit procedure is proposed as a test for spatial autocorrelation in choropleth maps. However, the observed frequency counts are not independent as required by the test. Two modified X2 tests are developed which specifically allow for such dependence and which are asymptotically distributed as χ 2 with the appropriate degrees of freedom.

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