Inference for Time Series Regression Models With Weakly Dependent and Heteroscedastic Errors
弱依赖与异方差误差下时间序列回归模型的推断AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要研究弱依赖与时变无条件方差下的时间序列趋势推断,并以宏观工资序列为例,直接对应时间序列。
弱依赖与异方差误差下时间序列回归模型的推断AI 解读 ↓
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Motivated by the need to assess the significance of the trend in some macroeconomic series, this article considers inference of a parameter in parametric trend functions when the errors exhibit certain degrees of nonstationarity with changing unconditional variances. We adopt the recently developed self-normalized approach to avoid the difficulty involved in the estimation of the asymptotic variance of the ordinary least-square estimator. The limiting distribution of the self-normalized quantity is nonpivotal but can be consistently approximated by using the wild bootstrap, which is not consistent in general without studentization. Numerical simulation demonstrates favorable coverage properties of the proposed method in comparison with alternative ones. The U.S. nominal wages series is analyzed to illustrate the finite sample performance. Some technical details are included in the online supplemental material.