FINITE-SAMPLE SIZE CONTROL OF IVX-BASED TESTS IN PREDICTIVE REGRESSIONS
预测回归中基于 IVX 检验的有限样本尺寸控制AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究持久性时间序列解释变量下预测回归的 IVX 推断与有限样本修正。
预测回归中基于 IVX 检验的有限样本尺寸控制AI 解读 ↓
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In predictive regressions with variables of unknown persistence, the use of extended IV (IVX) instruments leads to asymptotically valid inference. Under highly persistent regressors, the standard normal or chi-squared limiting distributions for the usual t and Wald statistics may, however, differ markedly from the actual finite-sample distributions which exhibit in particular noncentrality. Convergence to the limiting distributions is shown to occur at a rate depending on the choice of the IVX tuning parameters and can be very slow in practice. A characterization of the leading higher-order terms of the t statistic is provided for the simple regression case, which motivates finite-sample corrections. Monte Carlo simulations confirm the usefulness of the proposed methods.