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arXiv 2106.13293math.STstat.TH
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关于回归函数导数的投影估计量

On a Projection Estimator of the Regression Function Derivative

Fabienne Comte, Nicolas Marie

AI总结:

本文研究单变量回归模型中回归函数导数的估计,提出两种估计构造方式,推导不同假设下的风险界与最优收敛速率,并给出模型选择程序及对应风险界。

摘要:

本文研究标准单变量回归模型中回归函数导数的估计问题。估计量通过两种方式定义:对回归函数的非参数最小二乘估计量求导,或估计导数的投影。我们证明了两个可用于比较所提估计量的简单风险界,随后给出了稳定性假设下更精细的界。用于阐释假设与初步结果的基和空间既有紧型也有非紧型,我们讨论了估计量达到的收敛速率,其在紧情形下是最优的。最后,我们提出了一种模型选择程序并证明了相应的风险界,考虑具有非紧支撑的基会增加问题的难度。

英文摘要:

In this paper, we study the estimation of the derivative of a regression function in a standard univariate regression model. The estimators are defined either by derivating nonparametric least-squares estimators of the regression function or by estimating the projection of the derivative. We prove two simple risk bounds allowing to compare our estimators. More elaborate bounds under a stability assumption are then provided. Bases and spaces on which we can illustrate our assumptions and first results are both of compact or non compact type, and we discuss the rates reached by our estimators. They turn out to be optimal in the compact case. Lastly, we propose a model selection procedure and prove the associated risk bound. To consider bases with a non compact support makes the problem difficult.

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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