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

[Steven Samuels <sjsamuels@gmail.com>]

-

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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