I am simulating a large model (2 economies+rest of the world) using Dynare. The model in general works quite well. I log-linearize the model before simulating with Dynare. The steady-state values are all zero by definition and even if I ask Dynare to compute them it gives me zeros for all variables, Fine!
However, when Dynare solves the model it gives means of variables different from 0. I am not simulatig data, I am computing theoretical moments. How can this be explained? and is it really a problem for the rest of the results: irfs and second order moments…
Note: there are price levels in the model.