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Re: st:the disadvantage of using -xi- to create indicators for categorical variables


From   Amanda Fu <mandy.fu1@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st:the disadvantage of using -xi- to create indicators for categorical variables
Date   Fri, 17 Dec 2010 17:13:34 -0500

Thank you for the discussion! I had thought it is my problem of not
liking xi. I feel relived.

I will also check factor variables mentioned above.

Amanda

On Fri, Dec 17, 2010 at 11:18 AM, Steven Samuels <sjsamuels@gmail.com> wrote:
> -
>
> That default behavior can be changed. See  "Summary of controlling the
> omitted dummy" in the -help- for -xi-.  But factor variables offer many more
> options for choosing the reference category.
>
>
> Steve
> sjsamuels@gmail.com
>
> On Dec 17, 2010, at 2:43 AM, Laura R. wrote:
>
> As far as I know, with -xi- the reference category is chosen
> automatically, wich might be a disadvantage.
>
> Laura
>
> 2010/12/17 Maarten buis <maartenbuis@yahoo.co.uk>:
>>
>> --- On Thu, 16/12/10, Amanda Fu wrote:
>>>
>>> I am curious: can some one here share how you decide to
>>> decide to use -xi- or not to run a regression with lot
>>> of categorical variables interactions?
>>
>> I only used -xi- for a preliminary analysis when I was in
>> a hurry. Otherwise I prefered to create my own dummies
>> and interactions. Now I am slowly warming to Stata's new
>> factor variable notation, see: -help factor variable-,
>> and I see no use for -xi- at all.
>>
>> --maarten
>>
>> --------------------------
>> Maarten L. Buis
>> Institut fuer Soziologie
>> Universitaet Tuebingen
>> Wilhelmstrasse 36
>> 72074 Tuebingen
>> Germany
>>
>> http://www.maartenbuis.nl
>> --------------------------
>>
>>
>>
>>
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