I would like to set two different priors for trend growth rates to accommodate salient changes in the long-run growth rates. For example, I would like to set the higher mean for the first sample period than for the second sample period. Justiniano, Primiceri, and Tambalotti (2011), “Investment shocks and the relative price of investment”, have done the same things using their own Matlab codes. I wonder if it is possible in Dynare. I’d be very grateful if someone who knows how to implement it in Dynare shares his or her expertise.