The Effects of Temporal Aggregation on MIDAS Regressions
时间聚合对 MIDAS 回归的影响AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究混频时间序列回归中的时间聚合、动态项与移动平均结构,未明确以预测效果为研究目标。
时间聚合对 MIDAS 回归的影响AI 解读 ↓
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Time series used in practice are often temporal aggregates. A MIDAS regression model may be fitted wrongly assuming the independent variables are not aggregated when in fact they are. We derive the correct model’s specification under temporal aggregation of the independent variables, thus identifying the correct number of dynamic terms and the order of the MA component. We also show that these depend on the frequency of the variables and the aggregation order used. As a result, the three alternative estimators considered are asymptotically biased and it is possible to rank them according to their bias in some cases. Our results are also confirmed by Monte Carlo experiments and are illustrated with an empirical application.