X=u1
I=B1Y+B2X+u2
D=B3I+B4X+u3
Y=B5D+B6X+u4

B is beta

X: export, I: investment D: productivity, Y: GDP

in this Svar model. assume the X impact all othe variables, but other varibales don't allowed to interact with export

how can I builld the model and make the restriction of the short run in the Eview?

Thank you very much.谢谢大家