Combining Nonparametric and Optimal Linear Time Series Predictions
结合非参数预测与最优线性时间序列预测AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确研究平稳 ARMA 时间序列,并以结合线性与非参数方法改善预测为目标。
结合非参数预测与最优线性时间序列预测AI 解读 ↓
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We introduce a semiparametric procedure for more efficient prediction of a strictly stationary process admitting an ARMA representation. The procedure is based on the estimation of the ARMA representation, followed by a nonparametric regression where the ARMA residuals are used as explanatory variables. Compared to standard nonparametric regression methods, the number of explanatory variables can be reduced because our approach exploits the linear dependence of the process. We establish consistency and asymptotic normality results for our estimator. Numerical experiments show that significant gains can be achieved with our approach. All the supplemental materials used by this article are available online.