On boosting the power of Chatterjee’s rank correlation
On boosting the power of Chatterjee’s rank correlation
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关于增强 Chatterjee 排名相关性的力量
DOI:
10.1093/biomet/asac048
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发表时间:
2022
期刊:
影响因子:
2.7
通讯作者:
Han, F.
中科院分区:
文献类型:
--
作者:
Lin, Z.;Han, F.
The ingenious approach of to estimate a measure of dependence first proposed by based on simple rank statistics has quickly caught attention. This measure of dependence has the appealing property of being between 0 and 1, and being 0 or 1 if and only if the corresponding pair of random variables is independent or one is a measurable function of the other almost surely. However, more recent studies (; ) showed that independence tests based on Chatterjee’s rank correlation are unfortunately rate inefficient against various local alternatives and they call for variants. We answer this call by proposing an improvement to Chatterjee’s rank correlation that still consistently estimates the same dependence measure, but provably achieves near-parametric efficiency in testing against Gaussian rotation alternatives. This is possible by incorporating many right nearest neighbours in constructing the correlation coefficients. We thus overcome the ‘ only one disadvantage’ of Chatterjee’s rank correlation (, § 7).
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