Machine Learning Time Series Regressions With an Application to Nowcasting
机器学习时间序列回归及其即时预测应用AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确研究高维混频时间序列回归,并以美国 GDP 增长即时预测为应用,因此对应时间序列与预测方向。
机器学习时间序列回归及其即时预测应用AI 解读 ↓
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This article introduces structured machine learning regressions for high-dimensional time series data potentially sampled at different frequencies. The sparse-group LASSO estimator can take advantage of such time series data structures and outperforms the unstructured LASSO. We establish oracle inequalities for the sparse-group LASSO estimator within a framework that allows for the mixing processes and recognizes that the financial and the macroeconomic data may have heavier than exponential tails. An empirical application to nowcasting US GDP growth indicates that the estimator performs favorably compared to other alternatives and that text data can be a useful addition to more traditional numerical data. Our methodology is implemented in the R package midasml, available from CRAN.