Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/72724
Título: | Dissecting the multivariate extremal index and tail dependence |
Autor(es): | Ferreira, Helena Ferreira, Marta Susana |
Palavras-chave: | Multivariate extreme values Multivariate extremal index Tail dependence Extremal coefficients Madogram |
Data: | Out-2020 |
Editora: | Instituto Nacional de Estatística (INE) |
Revista: | REVSTAT: Statistical Journal |
Resumo(s): | A central issue in the theory of extreme values focuses on suitable conditions such that the well-known results for the limiting distributions of the maximum of i.i.d. sequences can be applied to stationary ones. In this context, the extremal index appears as a key parameter to capture the effect of temporal dependence on the limiting distribution of the maxima. The multivariate extremal index corresponds to a generalization of this concept to a multivariate context and affects the tail dependence structure within the marginal sequences and between them. As it is a function, the inference becomes more difficult, and it is therefore important to obtain characterizations, namely bounds based on the marginal dependence that are easier to estimate. In this work we present two decompositions that emphasize different types of information contained in the multivariate extremal index, an upper limit better than those found in the literature and we analyse its role in dependence on the limiting model of the componentwise maxima of a stationary sequence. We will illustrate the results with examples of recognized interest in applications. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/72724 |
ISSN: | 1645-6726 |
e-ISSN: | 2183-0371 |
Versão da editora: | https://www.ine.pt/revstat/pdf/REVSTAT_v18-n4-7.pdf |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CMAT - Artigos em revistas com arbitragem / Papers in peer review journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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IEM_rev2.pdf | manuscrito | 395,75 kB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons