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AW: AW: st: Fixed effect dummy variable


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   AW: AW: st: Fixed effect dummy variable
Date   Wed, 5 Aug 2009 09:29:26 +0200

<> 



No comma in the -varlist-, as advised in my earlier post. See -help
varlist-. Just type

-egen newvar=group(yearw region)-

I did  forget a -newvarname- in my earlier post, though. Sorry about that!


***
sysuse auto, clear
egen newvar=group(rep for)
***


HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Tharshini
Thangavelu
Gesendet: Mittwoch, 5. August 2009 09:27
An: statalist@hsphsun2.harvard.edu
Betreff: Re: AW: st: Fixed effect dummy variable

Hi,

I tried with the modified syntax but I still get the same error message. I
am
not quite sure way. Can it be due to my stata version? I have intercooled
Stata
9.0 for windows. Or because the yearw (year of work) consists of 10 year
period
while the region (census region) consists only of 9 region. But I have hard
time
to believe that it can be due to this problem.


. egen group (yearw,region)
invalid syntax
r(198);


/ Tharshini

On 2009-08-05, at 09:01, Martin Weiss wrote:
>
> <> 
>
> " I was trying with the following syntax:
> egen, group(year)
> egen, group(region)"
>
>
>
> -egen, group()- does take a -varlist-. So stick both vars in there:
>
> -egen, group(year region)-
>
>
> HTH
> Martin
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Tharshini
> Thangavelu
> Gesendet: Mittwoch, 5. August 2009 08:58
> An: statalist@hsphsun2.harvard.edu
> Betreff: Re: st: Fixed effect dummy variable
>
> Hi Clive,
>
> Yes, I meant a way of a combination. But the command that you have given
me
> doesn't seem to be working. I keep getting the error message : invalid
> syntax. 
> I have year of work from 1987 - 1996 (=total 10 years)and 9 region. 
>
> .tab yearw
>
>       yearw |      Freq.     Percent        Cum.
> ------------+-----------------------------------
>        1987 |     23,125       10.83       10.83
>        1988 |     21,510       10.08       20.91
>        1989 |     23,334       10.93       31.84
>        1990 |     23,110       10.83       42.67
>        1991 |     22,774       10.67       53.34
>        1992 |     22,235       10.42       63.75
>        1993 |     21,233        9.95       73.70
>        1994 |     20,747        9.72       83.42
>        1995 |     17,606        8.25       91.66
>        1996 |     17,793        8.34      100.00
> ------------+-----------------------------------
>       Total |    213,467      100.00
>
>
> .tab region
>
>      census |
>      region |      Freq.     Percent        Cum.
> ------------+-----------------------------------
>          11 |     17,436        8.17        8.17
>          12 |     30,363       14.22       22.39
>          21 |     31,048       14.54       36.94
>          22 |     18,448        8.64       45.58
>          31 |     34,182       16.01       61.59
>          32 |      9,581        4.49       66.08
>          33 |     19,520        9.14       75.22
>          41 |     21,222        9.94       85.17
>          42 |     31,667       14.83      100.00
> ------------+-----------------------------------
>       Total |    213,467      100.00
>
>
> I was trying with the following syntax:
> egen, group(year)
> egen, group(region)
>
> /Tharshini
>
>
> On 2009-08-05, at 06:33, Clive Nicholas wrote:
>> Tharshini Thangavelu wrote:
>>
>>> How do I create year and region fixed effect dummy variables?
>>
>> If you mean by way of a combination, then -egen, group()- will do the
> trick.
>>
>> -- 
>> Clive Nicholas
>>
>> [Please DO NOT mail me personally here, but at
>> <clivenicholas@hotmail.com>. Please respond to contributions I make in
>> a list thread here. Thanks!]
>>
>> "My colleagues in the social sciences talk a great deal about
>> methodology. I prefer to call it style." -- Freeman J. Dyson.
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/statalist/faq
>> *   http://www.ats.ucla.edu/stat/stata/
>
> -- 
> Tharshini THANGAVELU
> Forskarbacken 8 / 101
> 114 16 Stockholm
> Sweden
> Phone +46 (0)735 53 43 90
> E-mail thth4658@student.su.se
> *
> *   For searches and help try:
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> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/

-- 
Tharshini THANGAVELU
Forskarbacken 8 / 101
114 16 Stockholm
Sweden
Phone +46 (0)735 53 43 90
E-mail thth4658@student.su.se

*
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*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


*
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