The Empirical Analysis of the Relationship between our Country Steel Price Index and the International Iron ore Freight Rate

The use of econometric methods to analyze the relationship between our country steel price index and the international iron ore freight rate,time series stationarity test,cointegration test,Granger test of causality and model parameter estimation tools use,find that there is Granger causality between our country steel price index and the international iron ore freight rate,China' s steel price fluctuations to some extent affect the international iron ore freight.

基于ARIMA模型对我国公路物流运价指数的预测

采用ARIMA模型对我国2013年1月至2017年3月的我国公路运价指数月度数据进行预测分析.使用Eviews8对月度数据变化趋势和季节性进行验证结果说明该模型合理、有效,存在12个月左右的波动周期,运用ARIMA(4,1,1)(1,1,1)^(10)模型对2017年4月至2017年6月的我国公路物流运价指数进行了预测,得出到2017年6月我国公路物流运价指数涨幅维持在20%以内,与往年相比下降,但是从整体来看公路运价指数波动依旧较大.