Thanks Martin:
But it changes all values to zero.
My data in very simple form is like
country........year...GDP...initgdp*
Argentina... 1980...300.....300
Argentina... 1981...310....300
Argentina... 1982...340....300
Argentina... 1983...380....300
Brazil......... 1980...400....400
Brazil...........1981...410....400
Brazil...........1982...440....400
Brazil........... 1983..480....400
* The variable I want to make
When I use your command
bys country (year): gen initgdp = gdp[_n==1980]
bys country (year): replace initgdp = sum(initgdp)
all values of initgdp become zeros
May be I could not explain better earlier.
Best regards,
Tanveer
Maarten buis wrote:
> --- Choudry T Shehzad <[email protected]> wrote:
>
>> Now I want to make another variable that contains initial value of
>> GDP fixed (for all years) equal to e.g. value of GDP in year 1885
>> corresponding to each country.
>>
>
> bys country (year): gen initgdp = gdp[_n==1]
> bys country (year): replace initgdp = sum(initgdp)
>
> Hope this helps,
> Maarten
>
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
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>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
>
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--
Choudhry Tanveer Shehzad (Tanveer)
PhD Student
Department of Finance,
Faculty of Economics & Business,
University of Groningen,
Nettelbosje 2
9747 AE Groningen
The Netherlands
Mobile: 0031-644801970
Home Page: http://www.rug.nl/staff/c.t.shehzad/
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