Nonparametric inference via bootstrapping the debiased estimator
Nonparametric inference via bootstrapping the debiased estimator
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DOI：
10.1214/19-ejs1575
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发表时间：
2019-01-01
影响因子：
1.1
通讯作者：
Chen, Yen-Chi
中科院分区：
文献类型：
--
作者：
Cheng, Gang;Chen, Yen-Chi
在本文中，我们建议构造置信带的自举的去偏核密度估计（密度估计）和去偏局部多项式回归估计（回归分析）。Calonico等人（2018 b）最近采用了使用去偏估计量的想法，通过显式估计随机变化来构建给定点处密度函数（和回归函数）的置信区间。我们扩展了他们的想法，使用去偏估计，并进一步提出了一个自举方法，同时构建置信带。这种改进方法的优点是，我们可以很容易地从传统的带宽选择器选择平滑带宽和置信带将是渐近有效的。我们证明了自举置信带的有效性，并将其推广到密度水平集和逆回归问题。仿真研究证实了建议的置信带/集的有效性。我们将我们的方法应用于天文数据集，以显示其适用性。
In this paper, we propose to construct confidence bands by bootstrapping the debiased kernel density estimator (for density estimation) and the debiased local polynomial regression estimator (for regression analysis). The idea of using a debiased estimator was recently employed by Calonico et al. (2018b) to construct a confidence interval of the density function (and regression function) at a given point by explicitly estimating stochastic variations. We extend their ideas of using the debiased estimator and further propose a bootstrap approach for constructing simultaneous confidence bands. This modified method has an advantage that we can easily choose the smoothing bandwidth from conventional bandwidth selectors and the confidence band will be asymptotically valid. We prove the validity of the bootstrap confidence band and generalize it to density level sets and inverse regression problems. Simulation studies confirm the validity of the proposed confidence bands/sets. We apply our approach to an Astronomy dataset to show its applicability.