Testing equality of several distributions in separable metric spaces: A maximum mean discrepancy based approach

Jin-Ting Zhang, Jia Guo and Bu Zhou

Journal of Econometrics, 2024, vol. 239, issue 2

Abstract: A new test for equal distributions of several high-dimensional samples in separable metric spaces, with its test statistic constructed based on maximum mean discrepancy, is proposed and studied. The asymptotic null and alternative distributions of the test statistic are established under some mild conditions. The new test is implemented via a three-cumulant matched chi-square approximation with the associated approximation parameters consistently estimated from the data. A new data-adaptive Gaussian kernel width selection method is also suggested. Good performance of the new test is illustrated by intensive simulation studies and a real data example of Gini index curves.

Keywords: Data heterogeneity; Multi-sample test for equal distributions; Maximum mean discrepancy; Three-cumulant matched chi-square-approximation; Gaussian kernel (search for similar items in EconPapers)
JEL-codes: C12 (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:econom:v:239:y:2024:i:2:s0304407622000859

DOI: 10.1016/j.jeconom.2022.03.007

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