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arXiv 2406.08685stat.ME
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含缺失数据的空间误差模型的变分贝叶斯推断

Variational Bayes Inference for Spatial Error Models with Missing Data

Anjana Wijayawardhana, David Gunawan, Thomas Suesse

AI总结:

针对含响应变量缺失数据的空间误差模型,本文提出JVB与改进HVB两种变分贝叶斯算法,以更低计算成本实现随机缺失和非随机缺失下的准确推断。

摘要:

空间误差模型(SEM)是一种用于分析空间相关数据的联立自回归(SAR)模型。马尔可夫链蒙特卡洛(MCMC)是估计SEM最广泛使用的贝叶斯方法之一,但在处理响应变量中的缺失数据时,由于其高昂的计算成本而存在显著局限。变分贝叶斯(VB)近似为该问题提供了一种替代解决方案。本文提出两种采用具有因子协方差结构的高斯变分近似的基于VB的算法,即联合VB(JVB)和混合VB(HVB),它们适用于随机缺失和非随机缺失两种推断。在处理大量缺失值时,JVB并不准确,而标准HVB算法也难以实现准确推断。我们改进后的HVB版本能够在合理的计算时间内实现准确推断,从而提升了其性能。VB方法的性能通过模拟数据集和真实数据集进行了评估。

英文摘要:

The spatial error model (SEM) is a type of simultaneous autoregressive (SAR) model for analysing spatially correlated data. Markov chain Monte Carlo (MCMC) is one of the most widely used Bayesian methods for estimating SEM, but it has significant limitations when it comes to handling missing data in the response variable due to its high computational cost. Variational Bayes (VB) approximation offers an alternative solution to this problem. Two VB-based algorithms employing Gaussian variational approximation with factor covariance structure are presented, joint VB (JVB) and hybrid VB (HVB), suitable for both missing at random and not at random inference. When dealing with many missing values, the JVB is inaccurate, and the standard HVB algorithm struggles to achieve accurate inferences. Our modified versions of HVB enable accurate inference within a reasonable computational time, thus improving its performance. The performance of the VB methods is evaluated using simulated and real datasets.

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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