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lag should be max to run. you used one lag

i think, you should study about omitted variable problem

If you use VAR, your variables must be I(0). if your variables have trend, you should not use VAR.

to lardie2345

if all variables are I(1), you should use level values, if variables are different integrating order, you should equal them by integrating order.

how can i read Johansen cointegration test? i am a beginner. what should i read?