Re: st: AW: Problem with xi (Stata 11)

[Walter Garcia-Fontes <walter.garcia@upf.edu>]

* Martin Weiss [02/06/10 15:00]:
> This code produces consistent results for me:
> 
> *************
> webuse set http://puna.upf.edu
> webuse data/data.dta
> xi i.COUNTRY
> ta COUNTRY  _ICOUNTRY_56, nol
> *************

This is what I get:

. ta COUNTRY _ICOUNTRY_56, nol

   Country |
      code |      COUNTRY==56
   3-digit |         0          1 |     Total
-----------+----------------------+----------
        40 |     4,927          0 |     4,927 
        56 |       265      8,592 |     8,857 
       203 |     5,932          0 |     5,932 
       208 |     4,532          0 |     4,532 
       233 |     4,865          0 |     4,865 
       246 |     4,714          0 |     4,714 
       250 |     4,716          0 |     4,716 
       276 |     4,891          0 |     4,891 
       300 |     4,873          0 |     4,873 
       348 |     4,490          0 |     4,490 
       372 |     4,444        141 |     4,585 
       380 |    21,773          0 |    21,773 
-----------+----------------------+----------
     Total |    70,422      8,733 |    79,155 

See the 0's in 56 and the ones in 372 that shouldn't be there.

Now that you said I tried it from another machine with stata 10 and I
get the right results. 

Is "xi" deprecated in Stata 11? 

Walter

> 
> 
> HTH
> Martin
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Walter
> Garcia-Fontes
> Gesendet: Mittwoch, 2. Juni 2010 14:47
> An: Statalist
> Betreff: st: Problem with xi (Stata 11)
> 
> I have a problem with the "xi" command in Stata 11 (completely updated
> as of today). I tried to create a dataset as simple as possible to
> reproduce the problem, which can be accessed from my server. In the
> dataset there is a single variable called COUNTRY with numeric codes
> for each country and labels identifying the country.   
> 
> There are 12 different values for COUNTRY (12 different countries) and
> 79155 observations with a variable number of observations for each country.
> To reproduce: 
> 
> webuse set http://puna.upf.edu
> webuse data/data.dta
> xi i.COUNTRY
> 
> Stata creates variables _ICOUNTRY_n as it should, where n are the
> different codes for the 12 countries, omitting the country with the
> smallest code. 
> 
> The problem is that some of the values of _ICOUNTRY are 0 when they
> shouldn't be, for instance I have cases where _ICOUNTRY_56 = 0 but
> COUNTRY = 56. This happens randomly for a few cases and I've looked at
> it from all angles but couldn't figure out what is going on. 
> 
> If I reduce the number of variables or the number of observations the
> problem  disappears at some point, can't tell exactly when, so I'm
> providing the smallest example I could build. 
> 
> Walter
> 

-- 
Walter Garcia-Fontes
mailto: walter.garcia@upf.edu - http://puna.upf.edu
Departament d'Economia i Empresa - http://www.econ.upf.edu
Universitat Pompeu Fabra
Ramon Trias Fargas 25-27, 08005 Barcelona, Spain
Tel. +34 93 542 2722 - Fax. +34 93 542 1746

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