Hello everyone,
I have a little question: when we estimate a process through an ARMA model and this process is part of a DSGE model, how big should the shock be given the estimate?
Just for example, let’s suppose that I estimate the TFP through an ARMA model, and I obtain that the model is an ARMA(1,0) with persistence coefficient ar1 = 0.9 and sigma^2 = 0.205. So, the size of the shock should be:
var varepsilonv; stderr 100*sqrt(0.205);
or I’m wrong?
Thanks in advance