What you describe is essentially a structural break where a parameter (permanently) changes. With the current Dynare version that is not possible. We are still working on this feature. See also [How to set different priors for trend growth rates)
What you describe is essentially a structural break where a parameter (permanently) changes. With the current Dynare version that is not possible. We are still working on this feature. See also [How to set different priors for trend growth rates)