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arXiv 2403.14899stat.MEstat.ML
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结合辅助信息的噪声矩阵完成统计推断

Statistical Inference For Noisy Matrix Completion Incorporating Auxiliary Information

Shujie Ma, Po-Yao Niu, Yichong Zhang, Yinchu Zhu

AI总结:

本文研究半监督模型下结合辅助协变量的噪声矩阵完成统计推断,提出仅需少量迭代的迭代最小二乘估计方法,保证低秩矩阵和系数矩阵的逐项估计量具有渐近正态分布,并基于乘子自助法提出高维系数矩阵同时检验程序。

摘要:

本文研究了在辅助协变量可用时,半监督模型中噪声矩阵完成的统计推断。该模型由两部分组成:一部分是由未观测的潜在因子生成的低秩矩阵;另一部分通过由高维列向量组成的系数矩阵来建模观测协变量的效应。我们通过协变量的逻辑回归对响应的观测模式进行建模,并允许其概率随样本量的增加而趋近于零。在我们考虑的背景下,我们应用了迭代最小二乘(LS)估计方法。迭代LS方法通常具有较低的计算成本,但推导所得估计量的统计性质是一项具有挑战性的任务。我们证明了我们的方法仅需少量迭代,且所得的低秩矩阵和系数矩阵的逐项估计量均保证具有渐近正态分布。因此,可以对未知矩阵的每个元素进行个体推断。我们还提出了一种基于乘子自助法的高维系数矩阵同时检验程序。这种同时推断工具可以帮助我们进一步研究协变量在预测缺失项中的效应。

英文摘要:

This paper investigates statistical inference for noisy matrix completion in a semi-supervised model when auxiliary covariates are available. The model consists of two parts. One part is a low-rank matrix induced by unobserved latent factors; the other part models the effects of the observed covariates through a coefficient matrix which is composed of high-dimensional column vectors. We model the observational pattern of the responses through a logistic regression of the covariates, and allow its probability to go to zero as the sample size increases. We apply an iterative least squares (LS) estimation approach in our considered context. The iterative LS methods in general enjoy a low computational cost, but deriving the statistical properties of the resulting estimators is a challenging task. We show that our method only needs a few iterations, and the resulting entry-wise estimators of the low-rank matrix and the coefficient matrix are guaranteed to have asymptotic normal distributions. As a result, individual inference can be conducted for each entry of the unknown matrices. We also propose a simultaneous testing procedure with multiplier bootstrap for the high-dimensional coefficient matrix. This simultaneous inferential tool can help us further investigate the effects of covariates for the prediction of missing entries.

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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