Testing for Shifts in Trend With an Integrated or Stationary Noise Component
含单整或平稳噪声的趋势变化检验AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究时间序列趋势中的结构断点,并比较平稳与单整噪声下的检验表现,因此归入时间序列与结构变化。
含单整或平稳噪声的趋势变化检验AI 解读 ↓
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We consider testing for structural changes in the trend function of a time series without any prior knowledge of whether the noise component is stationary or integrated. Following Perron and Yabu (2009), we consider a quasi-feasible generalized least squares procedure that uses a super-efficient estimate of the sum of the autoregressive parameters αwhen α=1. This allows tests of basically the same size with stationary or integrated noise regardless of whether the break is known or unknown, provided that the Exp functional of Andrews and Ploberger (1994) is used in the latter case. To improve the finite-sample properties, we use the bias-corrected version of the estimate of αproposed by Roy and Fuller (2001). Our procedure has a power function close to that attainable if we knew the true value of αin many cases. We also discuss the extension to the case of multiple breaks.