I have run a VAR model, and done granger causality tests (results pasted below) and am trying to answer a textbook question which asks:
Is there any variable that appears to be close to being block exogenous with respect to the other variables? In any case, what does this mean?
To me it seems like DLRGDP is the closest. Exogenous means that one variable is not affected by changes in the other variables The p-values on the DLRGDP seem to indicate that we cannot reject the null hypothesis that DLRM2 does not granger cause DLRGDP. But the p-value that DRS granger causes DLRM2 is fairly low, at 0.0025.
What do you think, are any of these variables close to being block exogenous?