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K-Sample Test for Equality of Copulas

Abstract : We propose a test procedure to compare simultaneously K copulas, with K ≥ 2. The K observed populations can be paired. The test statistic is based on the differences between orthogonal projection coefficients associated to the density copulas, that we called copula coefficients. The procedure is data driven and we obtain a chi-square asymptotic distribution of the test statistic under the null. We illustrate our procedure via numerical studies and through two real datasets. Eventually, a clustering algorithm is deduced from the Ksample test and its performances are illustrated in a simulation experiment.
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Contributor : Yves Ismaël Ngounou Bakam Connect in order to contact the contributor
Submitted on : Wednesday, January 12, 2022 - 3:22:50 AM
Last modification on : Thursday, January 13, 2022 - 4:58:35 AM


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  • HAL Id : hal-03475324, version 2



Yves Ismaël Ngounou Bakam, Denys Pommmeret. K-Sample Test for Equality of Copulas. 2022. ⟨hal-03475324v2⟩



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