本文利用Baker et al.(2016)经济政策不确定性指数(BBD Index)和Diebold and Yilmaz (2012)方向性溢出模型(Directional Spillovers)构造"四国经济系统",对经济政策不确定性在国际间的动态溢出效应进行静态分析、比较静态分...本文利用Baker et al.(2016)经济政策不确定性指数(BBD Index)和Diebold and Yilmaz (2012)方向性溢出模型(Directional Spillovers)构造"四国经济系统",对经济政策不确定性在国际间的动态溢出效应进行静态分析、比较静态分析和动态分析。静态分析结果显示,各经济体政策不确定性的变动中有超过1/5来源于其他经济体的溢出;比较静态分析结果显示,经济系统内总溢出效应逐步增强,前金融危机时期为18. 09%,金融危机时期为29. 81%,经济复苏时期为33. 58%;动态分析结果显示,经济政策不确定性动态溢出的规模可能同国内政治周期和货币政策周期有关,米德冲突可能是主要传导渠道之一,美国、欧洲和日本应当为大部分溢出效应负责,中国是最大受害者之一。上述结论表明,我国应继续推进全面深化改革,加快浮动汇率制度改革,提高货币政策独立性。展开更多
Coral measure is a very important link in the process of mine development and production .The measurement provide basis for mine development and production. The accuracy of the measurement will directly affect the saf...Coral measure is a very important link in the process of mine development and production .The measurement provide basis for mine development and production. The accuracy of the measurement will directly affect the safety of coal production. The essay will elaborates the significance of coral measure and tells some new teclmology used for coral measure, and put forward to the ways of some common measurement problems. Finally, it discusses on how to improve the quality of coal measure.展开更多
文摘Coral measure is a very important link in the process of mine development and production .The measurement provide basis for mine development and production. The accuracy of the measurement will directly affect the safety of coal production. The essay will elaborates the significance of coral measure and tells some new teclmology used for coral measure, and put forward to the ways of some common measurement problems. Finally, it discusses on how to improve the quality of coal measure.