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arXiv 1808.02671stat.ME
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基于投影的回归模型的异方差检验

Testing heteroscedasticity for regression models based on projections

Falong Tan, Xuejun Jiang, Xu Guo, Lixing Zhu

摘要:

本文提出了高维参数回归模型和部分线性回归模型异方差性的一种新的检验方法。当协变量的维数较大时,现有的异方差检验由于维数的\curse而表现不佳。为了解决这个问题,我们构建了一个异方差检验,通过使用基于投影的经验过程。研究了在原假设和备择假设下检验统计量的渐近性质。结果表明,在假设检验中,该检验能以尽可能快的速度检测出偏离原假设的局部方案。由于检验统计量的极限零分布不是分布自由的,我们提出了一种基于残差的自助法。研究了Bootstrap近似的有效性。我们提出了一些模拟结果,以显示有限样本的测试性能。为了说明这一点,本文对两个实际数据进行了分析。

英文摘要:

In this paper we propose a new test of heteroscedasticity for parametric regression models and partial linear regression models in high dimensional settings. When the dimension of covariates is large, existing tests of heteroscedasticity perform badly due to the \curse of dimensionality". To attack this problem, we construct a test of heteroscedasticity by using a projection-based empirical process. We study the asymptotic properties of the test statistic under the null hypothesis and alternative hypotheses. It is shown that the test can detect local alternatives departure from the null hypothesis at the fastest possible rate in hypothesis testing. As the limiting null distribution of the test statistic is not distribution free, we propose a residual-based bootstrap. The validity of the bootstrap approximations is investigated. We present some simulation results to show the finite sample performances of the test. Two real data analyses are conducted for illustration.

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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