Estimation of the error distribution in a varying coefficient regression model

Anton Schick, Yilin Zhu and Xiaojie Du

Journal of Nonparametric Statistics, 2018, vol. 30, issue 2, 392-429

Abstract: This paper deals with the estimation of the error distribution function in a varying coefficient regression model. We propose two estimators and study their asymptotic properties by obtaining uniform stochastic expansions. The first estimator is a residual-based empirical distribution function. We study this estimator when the varying coefficients are estimated by under-smoothed local quadratic smoothers. Our second estimator which exploits the fact that the error distribution has mean zero is a weighted residual-based empirical distribution whose weights are chosen to achieve the mean zero property using empirical likelihood methods. The second estimator improves on the first estimator. Bootstrap confidence bands based on the two estimators are also discussed.

Date: 2018
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DOI: 10.1080/10485252.2018.1429608

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