论文标题
关于多元阿基赛马库氏有条件的有条件库的收敛性和奇异性,并估计条件依赖性
On convergence and singularity of conditional copulas of multivariate Archimedean copulas, and estimating conditional dependence
论文作者
论文摘要
The present contribution derives an explicit expression for (a version of) every uni- and multi-variate conditional distribution (i.e., Markov kernel) of Archimedean copulas and uses this representation to generalize a recently established result, saying that in the class of multivariate Archimedean copulas standard uniform convergence implies weak convergence of almost all univariate Markov kernels, to arbitrary multivariate Markov kernels.此外,我们证明,当几乎所有的单元和多元的马尔可夫内核都是单数时,阿基米德copula是单数的。然后将这些结果应用于有条件的Archimedean copulas,这些结果主要是从马尔可夫内核角度重新引入的,并且表明会收敛,奇异性和条件增长从阿基米德·库普拉斯(Archimedean Copulas)延伸到其条件性copulas。因此,令人惊讶的事实是,估计(发电机)直接产生(发电机)其条件副群的估计器。在此基础上,我们概述了最近引入的依赖度量的条件版本的使用和估计,作为众所周知的有条件版本的关联度量措施的替代方法,以便研究固定协变量值时的阿基米德模型的依赖性行为。
The present contribution derives an explicit expression for (a version of) every uni- and multi-variate conditional distribution (i.e., Markov kernel) of Archimedean copulas and uses this representation to generalize a recently established result, saying that in the class of multivariate Archimedean copulas standard uniform convergence implies weak convergence of almost all univariate Markov kernels, to arbitrary multivariate Markov kernels. Moreover, we prove that an Archimedean copula is singular if, and only if, almost all uni- and multivariate Markov kernels are singular. These results are then applied to conditional Archimedean copulas which are reintroduced largely from a Markov kernel perspective and it is shown that convergence, singularity and conditional increasingness carry over from Archimedean copulas to their conditional copulas. As consequence the surprising fact is established that estimating (the generator of) an Archimedean copula directly yields an estimator of (the generator of) its conditional copula. Building upon that, we sketch the use and estimation of a conditional version of a recently introduced dependence measure as alternative to well-known conditional versions of association measures in order to study the dependence behaviour of Archimedean models when fixing covariate values.