Time Series Estimation of the Dynamic Effects of Disaster-Type Shock
灾难型冲击动态效应的时间序列估计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 SVAR 的估计、结构冲击识别及动态响应,并讨论时间序列应用,直接对应时间序列和 VAR 冲击分析。
灾难型冲击动态效应的时间序列估计AI 解读 ↓
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This paper provides three results for SVARs under the assumption that the primitive shocks are mutually independent. First, a framework is proposed to accommodate a disaster-type variable with infinite variance into a SVAR. We show that the least squares estimates of the SVAR are consistent but have non-standard asymptotics. Second, the disaster shock is identified as the component with the largest kurtosis and whose impact effect is negative. An estimator that is robust to infinite variance is used to recover the mutually independent components. Third, an independence test on the residuals pre-whitened by the Choleski decomposition is proposed to test the restrictions imposed on a SVAR. The test can be applied whether the data have fat or thin tails, and to over as well as exactly identified models. Three applications are considered. In the first, the independence test is used to shed light on the conflicting evidence regarding the role of uncertainty in economic fluctuations. In the second, disaster shocks are shown to have short term economic impact arising mostly from feedback dynamics. The third uses the framework to study the dynamic effects of economic shocks post-covid.