Deterministic trend

Steady state
1

Hello everyone!
I am running semi-structural model in Dynare 5.5, and I have encountered the following issue:
In those kind of growth equations (S = S(-1) + (dS)/4 ) the steady state value of dS is not 0 but rather a number different than zero (equal to dS_SS for example). That means that S has a deterministic trend.
I tried to solve this with the following way:

deterministic_trends;
S (dS_SS);
end;```

But I am getting the following error:

Unrecognized field name "endogenous_names".

Error in MPMOD_full_1.driver (line 528)
tmp1 = strmatch('S',M_.endogenous_names,'exact');

How can I solve this?
Thank you!

2

Without the file, it is impossible to tell.

3

Thanks for the reply, professor!. I am attaching the file
MPMOD_full_1.mod (4.4 KB)

4

The deterministic_trends; is only for Dynare Julia, not Matlab-based Dynare. What are you trying to do?

6

This one is a simple matlab code, where I get residuals other than zero for this kind of equations:

Z_PRT_t = Z_PRT_t(-1) + dZ_PRT_t/4 ;

How can I fix them?
test.mod (685 Bytes)

7

What are you trying to do? Have Dynare automatically detrend your model? Estimate a model where there is a deterministic trend in the observables? Or run a local linear trend model as in A nonstationary model for output gap with a const in drift ?