用EVIEWS6。0中的stepwise 方法，虽然设定P为0。05，但如何结果没有进行选择呢
Selection Summary   
   
No regressors were chosen by the stepwise routine   
    Number of always included regressors: 8   
No search regressors   
Selection method: Stepwise backwards   
Stopping criterion: p-value forwards/backwards = 0.05/0.05   
Stopping criterion: Number of search regressors = 10