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Re: st: choice model analysis


From   Rhona Barr <r.f.barr@lse.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: choice model analysis
Date   Thu, 19 Jan 2012 12:54:42 +0000

Maarten

Great. Many thanks! 

Rhona Barr

Department of Geography & Environment
London School of Economics & Political Science

r.f.barr@lse.ac.uk | +44 (0)7815815970

How inappropriate to call this planet earth when it is quite clearly ocean - Arthur C. Clarke












On 18 Jan 2012, at 15:03, Maarten Buis wrote:

> On Wed, Jan 18, 2012 at 3:41 PM, Rhona Barr wrote:
>> Does anyone know what the appropriate model to analyse choice (conjunct) model data is?
> 
> That depends on the details, but you can look at -help asclogit-,
> -help clogit-, and -help nlogit-.
> 
>> Furthermore, how does one get around the issues of interaction effects within the stata outputs for non-linear models (as identified by Ai & Norton 2004) for such models given that the choice card grouping requires demographics to be entered in as interaction terms.
> 
> Please give full references, as is discussed in the Statalist FAQ, for
> a link see the bottom of every post on Statalist. I am assuming you
> are refering to:
> 
> Norton, E., H. Wang, and C. Ai. 2004. Computing interaction effects and
> standard errors in logit and probit models. The Stata Journal 4:
> 154-167
> 
> Since all the proposed models can report odds ratios you can just use
> the tricks discussed in (Buis 2010).
> 
> M.L. Buis (2010) "Stata tip 87: Interpretation of interactions in
> non-linear models", The Stata Journal, 10(2), pp. 305-308.
> 
> Hope this helps,
> Maarten
> 
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
> 
> 
> http://www.maartenbuis.nl
> --------------------------
> 
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