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st: RE: A problem with egen??


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: A problem with egen??
Date   Wed, 4 May 2005 00:18:57 +0100

I can't identify an -egen- function -pct()-. 

I can't reproduce this with -pctile()-. 

The internal code of -pctile()- doesn't 
handle p(50) differently from p(5). 

Please confirm exactly what you typed. 

I have to guess your result is some quirk of your data, 
on this information. 

Nick 
n.j.cox@durham.ac.uk 

heisnam singh a.k.a. Thoihen

>  I am having a problem in using the egen command.My
> dataset has many countries. I want to generate a
> variable which takes value= 5th (or  any) percentile
> value of another variable for each country.  I  tried
> this :
> 
> sort country   
> by country:egen X_5pct=pct(X), p(5)
> 
> I am getting the same value for all the countries,
> which  is the 5th percentile value of the entire
> sample. Whereas I want the 5th percentile value for
> each country separately.
> 
> However if I do without specifying the option p(5)
> 
> sort country   
> by country:egen X_5pct=pct(X)
> 
> Then I get the median (50th percentile value) for each
> country separately. But whenever I tried with the
> option p(5), I get the value for the entire sample.
 

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