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Recently, Ord and Getis (Ann Reg Sci 48:529–539, 2012) developed a local statistic $$H_i$$ H i , called local spatial heteroscedasticity statistic, to identify boundaries of clusters and to describe the nature of heteroscedasticity within clusters. Furthermore, in order to implement the hypothesis testing, Ord and Getis suggested a chi-square approximation method to approximate the null...
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