Exact post-selection inference with the lasso
Exact post-selection inference with the lasso
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发表时间:
2013-11
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通讯作者:
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
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.