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Hierarchical copulas with Archimedean blocks and asymmetric between-block pairs

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  • Chaoubi, Ihsan
  • Cossette, Hélène
  • Marceau, Etienne
  • Robert, Christian Y.

Abstract

A new class of hierarchical copulas is introduced based on joint survival functions of multivariate exponential mixture distributions. The key element of this construction is the mixing random vector defined by convolutions associated to a Lévy subordinator, and leading to hierarchical copulas with Archimedean within-block copulas and asymmetric between-block pair-copulas. For the specific case of two-level trees, dependence properties of pairs are investigated, and a full estimation procedure is proposed for the tree structure and parameters of the hierarchical copulas. The efficiency of the procedure is illustrated through three simulation examples and a study with two real datasets.

Suggested Citation

  • Chaoubi, Ihsan & Cossette, Hélène & Marceau, Etienne & Robert, Christian Y., 2021. "Hierarchical copulas with Archimedean blocks and asymmetric between-block pairs," Computational Statistics & Data Analysis, Elsevier, vol. 154(C).
    • Handle: RePEc:eee:csdana:v:154:y:2021:i:c:s0167947320301626
    DOI: 10.1016/j.csda.2020.107071
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    References listed on IDEAS

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