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arXiv 2307.04034stat.ME
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针对误设模型的稳健通用推断

Robust Universal Inference For Misspecified Models

Beomjo Park, Sivaraman Balakrishnan, Larry Wasserman

AI总结:

本文提出基于 universal inference 与分样本相对拟合检验反演的稳健推断方法,在模型误设下为分布投影构造有限样本有效置信集,并分析收缩速率、模拟及因果发现表现。

摘要:

在统计推断中,假设的统计模型被良好设定的情况很少符合现实,因此理解模型误设对推断程序的影响十分重要。当假设的统计模型存在误设时,自然的推断目标是数据生成分布在该模型上的投影。我们提出一种通用方法,可在较弱的正则性条件下、即使模型可能存在误设,也能为此类投影构造有效的置信集。该方法建立在 universal inference(通用推断)方法之上,并基于对一族相对拟合的分样本检验进行反演。我们研究了若干情形,在这些情形中,我们的方法可为各种投影分布给出精确或近似的有限样本有效置信集。我们还研究了所得置信集围绕其推断目标收缩的速率,并通过模拟研究以及使用线性因果模型和 CausalEffectPairs 数据集的因果发现研究对这些结果加以补充。

英文摘要:

In statistical inference, it is rarely realistic that the hypothesized statistical model is well-specified, and consequently it is important to understand the effects of misspecification on inferential procedures. When the hypothesized statistical model is misspecified, the natural target of inference is a projection of the data generating distribution onto the model. We present a general method for constructing valid confidence sets for such projections, under weak regularity conditions, despite possible model misspecification. Our method builds upon the universal inference method and is based on inverting a family of split-sample tests of relative fit. We study settings in which our methods yield either exact or approximate, finite-sample valid confidence sets for various projection distributions. We study rates at which the resulting confidence sets shrink around their target of inference and complement these results with a simulation study and a study of causal discovery using a linear causal model with the CausalEffectPairs dataset.

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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