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arXiv 1606.07488stat.ME
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信息抽样下的可分级贝叶斯

Scalable Bayes under Informative Sampling

Terrance D. Savitsky, Sanvesh Srivastava

摘要:

美国劳工统计局根据信息抽样设计,使用调查工具收集数据,将纳入的概率与答复相关联。该局广泛使用贝叶斯分层模型和后验抽样来估算响应水平数据中的缺失项,并推断人口参数。基于信息设计收集的调查数据的后验抽样在计算上是昂贵的,并且不支持局的生产时间表。出于这个问题,我们提出了一种新的方法来衡量贝叶斯计算的信息抽样设计。我们的方法将数据划分为较小的子集,对每个子集并行执行后验采样,并通过它们在2阶Wasserstein空间中的均值将来自所有子集的后验样本集合组合起来。在理论上,我们构造了一类抽样设计的条件,所提出的方法的后验一致性实现。从经验上讲,我们证明了我们的方法与传统方法相比具有竞争力,同时在许多模拟和该局进行的当前就业统计调查中显着更快。

英文摘要:

The United States Bureau of Labor Statistics collects data using survey instruments under informative sampling designs that assign probabilities of inclusion to be correlated with the response. The bureau extensively uses Bayesian hierarchical models and posterior sampling to impute missing items in respondent-level data and to infer population parameters. Posterior sampling for survey data collected based on informative designs are computationally expensive and do not support production schedules of the bureau. Motivated by this problem, we propose a new method to scale Bayesian computations in informative sampling designs. Our method divides the data into smaller subsets, performs posterior sampling in parallel for every subset, and combines the collection of posterior samples from all the subsets through their mean in the Wasserstein space of order 2. Theoretically, we construct conditions on a class of sampling designs where posterior consistency of the proposed method is achieved. Empirically, we demonstrate that our method is competitive with traditional methods while being significantly faster in many simulations and in the Current Employment Statistics survey conducted by the bureau.

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