How to simulate a shock after estimation?

General DSGE Modeling
1

I’m new to dynare DSGE modeling.
I’m running a small open economy, and I’ve already estimated the parameters and run a forecast. But I would like to run a forecast with a shock in some of the observable variables.

I tried

shocks;
var y; stderr -1;
end;

before the estimation line, and when I run the model I get a new plots window, but the forecast are the same as in the estimation without a shock

2

I am not sure I understand what you mean. How can you shock an observable variable? Or do you want to do a conditional_forecast?