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Re: st: Tabulation of a variable against itself lagged


From   Partho Sarkar <partho.ss+lists@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Tabulation of a variable against itself lagged
Date   Sun, 18 Sep 2011 17:00:33 +0530

You need to use -tsset- to declare your data as a time series, or in
this case, a panel data, before you can use time series operators.
See -help tsset-

On Sun, Sep 18, 2011 at 4:18 PM, Iulian Ihnatov <iulian.ihnatov@uaic.ro> wrote:
> Thank you, Robson!
> The solution seems obvious, but I think my data may have an unappropriate
> structure.
> Let me explain. I had csv file which I imported in Stata, with the following
> structure:
>
> countryname
> indicatorname
> y1999
> y2000
> ...........
> y2010
>
> I imported and structured the data to match other series that I use in my
> research, as follows:
> * import data
> insheet using regimuri.csv, delimiter(";")
> * structure data
> gen id1=_n
> reshape long y, i(id1) j(year)
> encode indicatorname, gen(varnum)
> drop indicatorname
> egen id2=group(countryname year)
> reshape wide y, i(id2) j(varnum)
> rename y1 regime
>
> Now my data looks like:
> id1
> id2
> year
> countryname
> regime
>
> If I use time series operators I get errors:
> E.g: -tabulate regime L.regime- "time-series operators not allowed"
>        -gen regime1=L.regime- "time variable not set"
>
> Have I been wrong in transforming the data? Any help would be highly
> appreciated.
>
> Yours sincerely,
> Iulian Ihnatov
>

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