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arXiv 1407.6895stat.APstat.ME
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节点随机效应的贝叶斯指数随机图模型

Bayesian Exponential Random Graph Models with Nodal Random Effects

Stephanie Thiemichen, Nial Friel, Alberto Caimo, Göran Kauermann

摘要:

我们扩展了著名的和广泛使用的指数随机图模型(ERGM),包括节点的随机效应,以补偿网络节点的异质性。Caimo和Friel(2011)提出的ERGM的贝叶斯框架为我们的建模算法提供了基础。网络模型中的一个中心问题是模型选择问题,并且遵循贝叶斯范式,我们专注于估计贝叶斯因子。要做到这一点,我们开发了一个近似的,但可行的计算贝叶斯因子,允许一个追求模型选择。两个数据示例和一个小型模拟研究说明了我们的混合模型方法和相应的模型选择。

英文摘要:

We extend the well-known and widely used Exponential Random Graph Model (ERGM) by including nodal random effects to compensate for heterogeneity in the nodes of a network. The Bayesian framework for ERGMs proposed by Caimo and Friel (2011) yields the basis of our modelling algorithm. A central question in network models is the question of model selection and following the Bayesian paradigm we focus on estimating Bayes factors. To do so we develop an approximate but feasible calculation of the Bayes factor which allows one to pursue model selection. Two data examples and a small simulation study illustrate our mixed model approach and the corresponding model selection.

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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