Non-linear mod file with log-linear external file

Steady state
1

Dear all,

Is it possible to write a model file (.mod file) in non-linear form and edit an external Steady State file in log-linear form?
If so, ther is any example of that?

Thanks a lot,
Marco

2

Dear Marco,

I do not understand what you mean here… The steady state is defined as a fixed point of the nonlinear dynamic model, and is, generally, a non linear function of the parameters. Why would you want to (log)linearize the steady state? Around which point in the parameter space?

That said, when a nonlinear solver (Newton like algorithm) is used to compute numerically the steady state, we solve a sequence of linear approximations of the static model. But this is done automatically by Dynare, and you do not need to provide an external steady state file in this case.

Best,
Stéphane.