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Understanding different ways to write VARMAX model and the output associated with it

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Understanding different ways to write VARMAX model and the output associated with it

I want to understand how to write the VARMAX correctly to test my hypothesis. I have one performance score (dependent variable) and I want to know which of the variables (indepdent variables) that I have is a leading indicator to this performance score, then I want to know by how many days does each variable lead the performance score.

What is the difference between the following two statements, what do they test differently, and which one is appropriate for my test:

1- 

proc varmax data=mymodeldata plots=all;
id start_day interval=day;
model page_views visits promotion accounts_closed performance_score / p=14;
causal group1=(performance_score) group2=(page_views visits promotion);
run;

2-

proc varmax data=mymodeldata plots=all;
id start_day interval=day;
model performance_score = page_views visits promotion / p=14;
causal group1=(performance_score) group2=(page_views visits promotion);
run;

 

Thank you.

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