Large shocks, small shocks, and economic fluctuations: Outliers in macroeconomic time series
大冲击、小冲击与经济波动:宏观时间序列中的异常值AI 解读 ↓
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大冲击、小冲击与经济波动:宏观时间序列中的异常值AI 解读 ↓
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Abstract We analyse fifteen post‐World War II US macroeconomic time series using a modified outlier identification procedure based on Tsay (1988a). ‘Large shocks’ appear to be present in all the series we examined. Furthermore, there are three basic outlier patterns: (1) outliers seem to be associated with business cycles, (2) outliers are clustered together—both over time and across series, (3) there appears to be a dichotomy between outlier behaviour of real versus nominal series. Also, after controlling for outliers, much of the evidence of non‐linearity in many of the time series is eliminated.