[Gretl-users] Re: Forecast graphic treatment of panel data
Am 28.02.2024 um 09:37 schrieb Brian Revell:
There is an irritation in using the Forecast Function in Analysis in
that it treats Panel data as a continuum between adjacent panel units
in plotting by observation number sequence. So as illustrated below,
there are 21 annual observations in Panel 1 ending in 2021. However
the forecast funtion treats this as as a observation continuum from
1:21 to 2:01(year 2001) and plots an irritaing line between1:21 and
2:01......and similarly between all the adjacent 10 Panel Units. Is
there anyway to suppress this joining line, as the forecast graph
plots beautiful CI shaded areas.
The workaround is to transfer the data to Excel -but that does not
provided a shaded 95% CI -which is clearly more elegan -only the
ability to plot the Upper and lower CI bounds as lines..
Hi Brian,
I tried to run a forecast on the grunfeld example panel dataset shipped
with gretl. I restricted the sample to leave out the last two time
periods, to save them for forecasting, and then estimated a trivial
dynamic/reduced-form fixed-effects regression with "invest" as the dep.
variable. (Let's ignore the Nickell bias issues for this example.) No
contemporaneous variables, but in the model window under the Analysis
menu the "Forecasts..." entry was still greyed out, so I couldn't
cross-check what you described.
So, it would be helpful if you could describe how exactly and with what
data you produced your forecasts.
thanks
sven
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