Local dependence estimation using semiparametric Archimedean copulas
نویسندگان
چکیده
The authors define a new semiparametric Archimedean copula family having a flexible dependence structure. The family’s generator is a local interpolation of existing generators. It has locally-defined dependence parameters. The authors present a penalized constrained least-squares method to estimate and smooth these parameters. They illustrate the flexibility of their dependence model in a bivariate survival example. Estimation de la dépendance locale sur base de copules archimédiennes semiparamétriques Résumé : Les auteurs définissent une nouvelle famille de copules archimédiennes semiparamétriques dont la structure de dépendance est flexible. Le générateur de la famille est une interpolation locale de générateurs existants. Ses paramètres de dépendance sont définis localement. Les auteurs présentent une méthode de moindres carrés contraints pénalisés permettant l’estimation lisse de ces paramètres. Ils illustrent la flexibilité de leur modèle de dépendance dans un exemple de survie bivariée.
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تاریخ انتشار 2005