Double Machine Learning for Time Series
面向时间序列的双重机器学习AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确针对宏观时间序列,并以残差化局部投影估计监管资本变化的动态效应,因此对应时间序列与局部投影方向。
面向时间序列的双重机器学习AI 解读 ↓
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We modify the Double Machine Learning estimator to broaden its applicability to macroeconomic time-series settings. A deterministic cross-fitting step, termed Reverse Cross-Fitting, leverages the time-reversibility of stationary series to improve sample utilization and efficiency. We detail and prove the conditions under which the estimator is asymptotically valid. We then demonstrate, through simulations, that its performance remains valid in realistic finite samples and is robust to model misspecification and violations of assumptions, such as heteroskedasticity. In high dimensions, predictive metrics for tuning nuisance learners do not generally minimize bias in the causal score. We propose a calibration rule targeting a "Goldilocks zone", a region of tuning parameters that delivers stable, partialled-out signals and reduced small-sample bias. Finally, we apply our procedure to residualized Local Projections to estimate the dynamic effects of a rise in Tier 1 regulatory capital. The results underscore the usefulness of the methodology for inference in macroeconomic applications.
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用于动态有效连接的贝叶斯时变张量向量自回归模型
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