文章基本信息

标题：gofCopula: Goodness-of-Fit Tests for Copulae
本地全文：下载
作者：Ostap Okhrin ; Simon Trimborn ; Martin Waltz 等
期刊名称：R News
印刷版ISSN：1609-3631
出版年度：2021
卷号：13
期号：1
页码：467-498
语种：English
出版社：The R Foundation for Statistical Computing
摘要：The last decades show an increased interest in modeling various types of data through copulae. Different copula models have been developed, which lead to the challenge of finding the best fitting model for a particular dataset. From the other side, a strand of literature developed a list of different Goodness-of-Fit (GoF) tests with different powers under different conditions. The usual practice is the selection of the best copula via the p-value of the GoF test. Although this method is not purely correct due to the fact that non-rejection does not imply acception, this strategy is favored by practitioners. Unfortunately, different GoF tests often provide contradicting outputs. The proposed R-package brings under one umbrella 13 most used copulae plus their rotated variants together with 16 GoF tests and a hybrid one. The package offers flexible margin modeling, automatized parallelization, parameter estimation, as well as a user-friendly interface, and pleasant visualizations of the results. To illustrate the functionality of the package, two exemplary applications are provided.