Hi. May I ask what kind of restrictions can I put for contemporaneous effects in SVAR model? I know that the restrictions must be (n^2+n)/2. I put 7 restrictions for 7x7 matrix which are b11=b22=b33=...=b77=1. What aspects do I have to look into so that I can put the extra 21 restrictions in the matrix? I try to put restrictions based on my Granger causality results but I have more that the supposed restrictions, which are 28 restrictions. Please help me.
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