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arXiv 1102.5431stat.MEq-fin.ST
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异方差时间序列均值变化的检验

Testing for change in mean of heteroskedastic time series

Mohamed Boutahar

摘要:

本文考虑了一种拉格朗日乘数型检验(LM),用于检测具有未知形式异方差的时间序列的均值变化。我们得到了极限分布下的零,并证明了一致性的测试对替代的突然或平滑的变化的意思。我们还进行了一些蒙特卡罗模拟来分析的大小失真和功率的建议测试。我们得出的结论是,对于中等样本量,该测试具有良好的性能。最后,我们使用标准普尔500指数的每日收盘水平进行了实证应用,以说明所提出的测试的有用性。

英文摘要:

In this paper we consider a Lagrange Multiplier-type test (LM) to detect change in the mean of time series with heteroskedasticity of unknown form. We derive the limiting distribution under the null, and prove the consistency of the test against the alternative of either an abrupt or smooth changes in the mean. We perform also some Monte Carlo simulations to analyze the size distortion and the power of the proposed test. We conclude that for moderate sample size, the test has a good performance. We finally carry out an empirical application using the daily closing level of the S&P 500 stock index, in order to illustrate the usefulness of the proposed test.

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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