Inferences on the association parameter in copula models for bivariate survival data

Inferences on the association parameter in copula models for bivariate survival data
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DOI:
10.2307/2533269
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发表时间:
1995-12-01
期刊:
影响因子:
1.9
通讯作者:
Louis, TA
Louis, TA
中科院分区:
数学3区
文献类型:
--
作者:
Shih, JH;Louis, TA

文献摘要

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我们研究了双变量生存数据的联结模型中关联参数的两阶段参数和两阶段半参数估计程序,其中允许对其中一个或两个分量进行审查。我们推导出估计器的渐近性质,并通过模拟比较它们的性能。关联参数的参数估计和半参数估计在独立性上都是有效的,并且边际中的参数估计具有高效率并且对于依赖结构的错误指定具有鲁棒性。此外,我们为关联参数的半参数估计器提出了一致方差估计器。我们将所提出的方法应用于艾滋病数据集以进行说明。
We investigate two-stage parametric and two-stage semi-parametric estimation procedures for the association parameter in copula models for bivariate survival data where censoring in either or both components is allowed. We derive asymptotic properties of the estimators and compare their performance by simulations. Both parametric and semi-parametric estimators of the association parameter are efficient at independence, and the parameter estimates in the margins have high efficiency and are robust to misspecification of dependency structures. In addition, we propose a consistent variance estimator for the semi-parametric estimator of the association parameter. We apply the proposed methods to an AIDS data set for illustration.