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Statistical Inference for High-Dimensional Models via Recursive Online-Score Estimation

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Version 2 2020-01-23, 19:47
Version 1 2020-01-04, 03:07
journal contribution
posted on 2020-01-23, 19:47 authored by Chengchun Shi, Rui Song, Wenbin Lu, Runze Li

In this article, we develop a new estimation and valid inference method for single or low-dimensional regression coefficients in high-dimensional generalized linear models. The number of the predictors is allowed to grow exponentially fast with respect to the sample size. The proposed estimator is computed by solving a score function. We recursively conduct model selection to reduce the dimensionality from high to a moderate scale and construct the score equation based on the selected variables. The proposed confidence interval (CI) achieves valid coverage without assuming consistency of the model selection procedure. When the selection consistency is achieved, we show the length of the proposed CI is asymptotically the same as the CI of the “oracle” method which works as well as if the support of the control variables were known. In addition, we prove the proposed CI is asymptotically narrower than the CIs constructed based on the desparsified Lasso estimator and the decorrelated score statistic. Simulation studies and real data applications are presented to back up our theoretical findings. Supplementary materials for this article are available online.

Funding

This work was supported by NSF grants DMS 1555244 and 1820702, and NIH grant NIH P01CA142538. Li also received partial travel support from NNSFC 11690015 during his visit at Nankai University. The content is solely the responsibility of the authors and does not necessarily represent the official views of NSF or NIH.

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