Uncertainty shock implementations

[jpfeifer]

1. I am not sure I understand the question. For sigOstar*epsPOstar, sigOstarss only gives you the standard deviation if epsPOstar has standard deviation 1. As a sidenote, see point 1 of

Shock to standard deviation

Mostly yes. But You are using a log-log-specification, whose moments do not exist. See Andreasen (2010) I would recommend against GIRFs. See https://github.com/JohannesPfeifer/DSGE_mod/blob/master/Basu_Bundick_2017/Basu_Bundick_2017.mod for an alternative.

2. To shut off uncertainty, you can simply set its standard deviation to 0.
3. What do you mean with “turning epsPOstar off”? You usually just want to keep it to 0 on average in GIRFs as in DSGE_mod/Basu_Bundick_2017/Basu_Bundick_2017.mod at master · JohannesPfeifer/DSGE_mod · GitHub