Hi, there is a strange problem in my model.
Variable named “FX” is not stationary in my model but its growth rate is ok.
That is, if I code my mod-file as
model ;
…
…
ac - ac(-1) = fx - fx(-1) + de - pi ;
end;
dynare cannot run estimation showing Blanchard and Kahn message.
However, If I code
model
…
…
ac - ac(-1) = dfx + de - pi ;
end ;
It is OK and dynare run estimation well.
I would like to know if I continue my work with this.
Next question is how to use data on “dfx”.
Since “dfx” means FX growth, I use its growth rate data to estimate the model.
However, data for other observable variables are all HP-filtered ones
because I do not impose unit-root technology.
According to the data on FX reserve there is a trend in its level.
I first thought that since fx (satisfying dfx = fx - fx(-1)) is not defined in my model because of its nonstationarity,
it is ok to use just its growth rate data without detrending.
Instead, I use prefilter=1 to remove a trend in the FX growth rate.
How do you think so?
Do I have to use the growth rate of HP-filtered FX ?
I uploaded my mod-file and data. The data file is actually excel spreadsheet please use “.xlsx”.
Thank you
pr_k.mod (8.8 KB)
data_k.zip (48.2 KB)