When setting up the Granger causality (Wald) test, I determine the optimum lag using information criterioncriteria AIC, BIC, FPE to test for causality.
- What does the lag selection really mean?
- IfDoes the selected lag describesdescribe the delay of the Granger cause effect? That is, if I select lag=6$\text{lag}=6$, does that mean that X$X$ Granger causes Y,-causes $Y$ with a delay of 6 time units (say, weeks)?