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arXiv 1608.01593stat.ME
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对Copula结构的广义可加模型

Generalized Additive Models for Pair-Copula Constructions

Thibault Vatter, Thomas Nagler

摘要:

对Copula构造是使用二元Copula作为构建块的灵活依赖模型。在本文中,我们使用广义可加模型来扩展它们,允许协变量的影响。借用传统的单变量背景下的想法,我们让每个配对copula参数直接依赖于协变量的参数,半参数或非参数的方式。本文提出了一种序贯估计方法,并通过模拟研究了四种主要汇率的日内收益率之间的时变相关结构。一个R包、一个再现本文中结果的脚本和其他模拟结果作为补充材料提供。

英文摘要:

Pair-copula constructions are flexible dependence models that use bivariate copulas as building blocks. In this paper, we use generalized additive models to extend them by allowing covariates effects. Borrowing ideas from a traditionally univariate context, we let each pair-copula parameter depend directly on the covariates in a parametric, semiparametric or nonparametric way. We propose a sequential estimation method that we study by simulation, and apply it to investigate the time-varying dependence structure between the intraday returns on four major foreign exchange rates. An R package, a script reproducing the results in this article, and additional simulation results are provided as supplementary material.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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