2009/12/3 "Elisabeth Müller" <[email protected]>:
> Hello,
>
> I have a problem when defining a panel. I type:
>
> tsset id year
>
> the error message is:
> repeated time values within panel
>
> Everything is ordere by id. What could be the problem?
At a guess (without seeing your data), probably exactly what Stata is
telling you!
You have some individuals (id) where there is more than one
observation for a given year. For example...
input id year
1 2001
1 2002
1 2003
2 2001
2 2002
2 2002
2 2003
end
tsset id year
repeated time values within panel
r(451);
. drop in 6
(1 observation deleted)
. tsset id year
panel variable: id (strongly balanced)
time variable: year, 2001 to 2003
delta: 1 unit
In the above example person 2 has two entries for the year 2002,
you'll have some similar error in your data.
Neil
--
"The combination of some data and an aching desire for an answer does
not ensure that a reasonable answer can be extracted from a given body
of data." ~ John Tukey (1986), "Sunset salvo". The American
Statistician 40(1).
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