Computational Methods for Multiplicative Intensity Models Using Weighted Gamma Processes
Computational Methods for Multiplicative Intensity Models Using Weighted Gamma Processes
复制标题
使用加权伽玛过程的乘法强度模型的计算方法
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
Lancelot F. James
中科院分区:
文献类型:
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作者:
H. Ishwaran;Lancelot F. James
We develop computational procedures for a class of Bayesian nonparametric and semiparametric multiplicative intensity models incorporating kernel mixtures of spatial weighted gamma measures. A key feature of our approach is that explicit expressions for posterior distributions of these models share many common structural features with the posterior distributions of Bayesian hierarchical models using the Dirichlet process. Using this fact, along with an approximation for the weighted gamma process, we show that with some care, one can adapt efficient algorithms used for the Dirichlet process to this setting. We discuss blocked Gibbs sampling procedures and Pólya urn Gibbs samplers. We illustrate our methods with applications to proportional hazard models, Poisson spatial regression models, recurrent events, and panel count data.
DOI:
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发表时间:
1972
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影响因子:
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作者:
D. Cox
通讯作者:
D. Cox