Re: st: Re: SW logisitc

[Richard Williams <Richard.A.Williams.5@ND.edu>]

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.


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