Hi all,
I’m currently working on a replication using the model presented by Cogley et al. 2010. The model code comes from the US_CPS10 mod file on the MMBrep github repo.
I’m quite new to Dynare, and as such I was hoping to get some clarity on some questions.

The parameters fp and fy (corresponding to taylor rule params for inflation and output respectively) appear inverted. That is, the prior mean of fp matches closely to the posterior mean of fy and vice versa, I’m wondering if this is perhaps a feature of my dataset or whether there is an error in my model code. I have gone through the equations but nothing stands out to me as an obvious error that might be causing this.

Log data density: My estimated model has a positive log data density (=138), I understand that this is not necessarily an outright issue, but my understanding is that this is somewhat of a red flag. Are there any “usual suspect” areas that I should be looking at to investigate this?

Unit roots: In the original CPS paper, there is no mention that I can see of filtering nonstationary variables. Specifically, the interest rate variable, R, in my dataset is nonstationary. Is it generally recommended that I apply a transformation to this series to get R as an I(0) variable?
Appreciate any assistance/direction you can provide.
US_CPS10.mod (5.0 KB)