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arXiv 1304.7847stat.ME
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超高维回归的广义信念推断

Generalized Fiducial Inference for Ultrahigh Dimensional Regression

Randy C. S. Lai, Jan Hannig, Thomas C. M. Lee

摘要:

近年来,多维线性回归问题引起了研究界的极大关注。在稀疏性假设下,大多数已发表的工作都致力于选择和估计的显着预测变量。本文研究了这个问题的一个不同的,但从根本上重要的方面:参数估计和模型选择的不确定性量化。更具体地说,本文提出的方法来推导的概率密度函数的所有可能的模型的集合,也为相应的参数构造置信区间。这些建议的方法是使用广义基准方法,这是一个有争议的费舍尔的基准思想的变体。研究了所提方法的理论性质,特别是证明了基于所提方法的统计推断将具有精确的渐近频率论性质。在经验性能方面,所提出的方法进行了测试模拟实验和应用到一个真实的数据集。最后,这项工作也可以被视为一个有趣的和成功的应用费舍尔的基准思想的一个重要的和当代的问题。据作者所知,这是第一次将基准思想应用于所谓的“大p小n”问题。

英文摘要:

In recent years the ultrahigh dimensional linear regression problem has attracted enormous attentions from the research community. Under the sparsity assumption most of the published work is devoted to the selection and estimation of the significant predictor variables. This paper studies a different but fundamentally important aspect of this problem: uncertainty quantification for parameter estimates and model choices. To be more specific, this paper proposes methods for deriving a probability density function on the set of all possible models, and also for constructing confidence intervals for the corresponding parameters. These proposed methods are developed using the generalized fiducial methodology, which is a variant of Fisher's controversial fiducial idea. Theoretical properties of the proposed methods are studied, and in particular it is shown that statistical inference based on the proposed methods will have exact asymptotic frequentist property. In terms of empirical performances, the proposed methods are tested by simulation experiments and an application to a real data set. Lastly this work can also be seen as an interesting and successful application of Fisher's fiducial idea to an important and contemporary problem. To the best of the authors' knowledge, this is the first time that the fiducial idea is being applied to a so-called "large p small n" problem.

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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