Bootstrap inference for impulse response functions in factor‐augmented vector autoregressions
因子增强 VAR 中脉冲响应函数的自助法推断AI 解读 ↓
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因子增强 VAR 中脉冲响应函数的自助法推断AI 解读 ↓
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Summary In this study, we consider residual‐based bootstrap methods to construct the confidence interval for structural impulse response functions in factor‐augmented vector autoregressions. In particular, we compare the bootstrap with factor estimation (Procedure A) with the bootstrap without factor estimation (Procedure B). Both procedures are asymptotically valid under the condition , where N and T are the cross‐sectional dimension and the time dimension, respectively. However, Procedure A is also valid even when with 0 ≤ c < ∞ because it accounts for the effect of the factor estimation errors on the impulse response function estimator. Our simulation results suggest that Procedure A achieves more accurate coverage rates than those of Procedure B, especially when N is much smaller than T . In the monetary policy analysis of Bernanke et al. ( Quarterly Journal of Economics , 2005, 120 (1), 387–422), the proposed methods can produce statistically different results.