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Re: st: Re: SW logisitc


From   "Rodrigo A. Alfaro" <ralfaro76@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Re: SW logisitc
Date   Tue, 12 Sep 2006 19:45:29 -0400

An example of Richard answer (using version 8)

 sysuse auto
 sw logit foreign (price mpg) ( trunk weight length turn), pr(.2) lockterm1
 sw logit foreign price mpg ( trunk weight length turn), pr(.2)

Rodrigo.

----- Original Message ----- 
From: "Richard Williams" <Richard.A.Williams.5@ND.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, September 12, 2006 2:46 PM
Subject: Re: st: Re: SW logisitc


At 12:28 PM 9/12/2006, Shi Huang wrote:
>Hi, Rodrigo,
>
>Thank you so much for help. It works.
>
>BTW, Do you know how to force some variables stay in the model when
>running backward selection?


In Stata 9 with the sw prefix, the lockterm1 option specifies that
the first term be included in the model and not be subjected to the
selection criteria.


-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
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EMAIL:  Richard.A.Williams.5@ND.Edu
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