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Correlations with tailored extremal properties

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arxiv 2008.10177 v2 pith:WQMDVG4U submitted 2020-08-24 math.ST stat.TH

classification math.STstat.TH
keywords functionclasscoefficientcorrelationcorrelationsmeasurablepropertiesvariable
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Recently, Chatterjee has introduced a new coefficient of correlation which has several natural properties. In particular, the coefficient attains its maximal value if and only if one variable is a measurable function of the other variable. In this paper, we seek to define correlations which have a similar property, except now the measurable function must belong to a pre-specified class, which amounts to a shape restriction on the function. We will then look specifically at the correlation corresponding to the class of monotone nondecreasing functions, in which case we can prove various asymptotic results, as well as perform local power calculations.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Distribution-free Measures of Association based on Optimal Transport

    math.ST 2024-11 conditional novelty 7.0 of 10

    A new class of rank-based, kernel and optimal-transport measures of multivariate association that are distribution-free under independence, exactly characterize independence and functional dependence, and have a unifo...

  2. On a rank-based Azadkia-Chatterjee correlation coefficient

    math.ST 2024-12 conditional novelty 6.0 of 10

    A rank-based nearest-neighbor graph yields a scale-invariant Azadkia-Chatterjee correlation coefficient that is consistent and, for d ≠ 2, asymptotically normal under independence.

  3. A Modified Dependence Measure Related to Chatterjee's Rank Correlation: Theoretical Properties and Asymptotic Analysis

    math.ST 2026-08 reject novelty 3.0 of 10

    The proposed right-continuous variant of the DSS measure is not new for continuous variables, and the theorem giving its null distribution is contradicted by a simple calculation.

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