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Parametrically guided local quasi-likelihood with censored data

机译:带有检查数据的参数引导局部拟似然性

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It is widely pointed out in the literature that misspecification of a parametric model can lead to inconsistent estimators and wrong inference. However, even a misspecified model can provide some valuable information about the phenomena under study. This is the main idea behind the development of an approach known, in the literature, as parametrically guided nonparametric estimation. Due to its promising bias reduction property, this approach has been investigated in different frameworks such as density estimation, least squares regression and local quasi-likelihood. Our contribution is concerned with parametrically guided local quasi-likelihood estimation adapted to randomly right censored data. The generalization to censored data involves synthetic data and local linear fitting. The asymptotic properties of the guided estimator as well as its finite sample performance are studied and compared with the unguided local quasi-likelihood estimator. The results confirm the bias reduction property and show that, using an appropriate guide and an appropriate bandwidth, the proposed estimator outperforms the classical local quasi-likelihood estimator.
机译:文献中广泛指出,参数模型的错误指定会导致估计量不一致和推断错误。但是,即使是错误指定的模型也可以提供有关正在研究的现象的一些有价值的信息。这是文献中称为参数引导的非参数估计的方法发展背后的主要思想。由于其有希望的减少偏差的特性,已在不同的框架(例如密度估计,最小二乘回归和局部拟似然)中研究了该方法。我们的贡献涉及适用于随机右删失数据的参数引导局部准似然估计。审查数据的一般化涉及综合数据和局部线性拟合。研究了引导估计器的渐近性质及其有限样本性能,并将其与非引导局部拟似然估计器进行了比较。结果证实了偏差的减少性质,并表明,使用适当的指南和适当的带宽,所提出的估计器优于经典的局部拟似然估计器。

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