Exact post-selection inference with the lasso

Exact post-selection inference with the lasso
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发表时间:
2013-11
期刊:
arXiv: Statistics Theory
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通讯作者:
J. Lee;Dennis L. Sun;Yuekai Sun;Jonathan E. Taylor
J. Lee;Dennis L. Sun;Yuekai Sun;Jonathan E. Taylor
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作者:
J. Lee;Dennis L. Sun;Yuekai Sun;Jonathan E. Taylor

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我们开发了一个使用套索进行选择后推理的框架。我们框架的核心是表征截断正态随机变量的线性组合/对比的精确(非渐近)分布的结果。这一结果使我们能够 (i) 获得用于解释选择过程的所选系数的诚实置信区间,以及 (ii) 设计一个检验统计量,当所有相关变量都已包含在模型中时,该检验统计量具有精确的(非渐近)Unif(0,1) 分布。
We develop a framework for post-selection inference with the lasso. At the core of our framework is a result that characterizes the exact (non-asymptotic) distribution of linear combinations/contrasts of truncated normal random variables. This result allows us to (i) obtain honest confidence intervals for the selected coefficients that account for the selection procedure, and (ii) devise a test statistic that has an exact (non-asymptotic) Unif(0,1) distribution when all relevant variables have been included in the model.