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st: RE: RE: Comparing models - Akaike, Wald-Test?
Try -ssc d fitstat- in web-aware Stata
Martin Weiss
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Diplom-Kaufmann Martin Weiss
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-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Beat Hintermann
Sent: Monday, April 14, 2008 9:31 PM
To: [email protected]
Subject: st: RE: Comparing models - Akaike, Wald-Test?
have you tried
estat ic
________________________________________
From: [email protected]
[[email protected]] On Behalf Of Markus K�ller
[[email protected]]
Sent: Monday, April 14, 2008 3:28 PM
To: [email protected]
Subject: st: Comparing models - Akaike, Wald-Test?
Hello everyone,
I have some problems comparing two different approaches.
Both models are Count data models, one the standard Poisson-model and the
other one a generalized Poisson-Count-Data-model.
I want to use the Akaike criterion to compare both approaches and wondered
whether there is any function in stata to compute that criterion or whether
it is easy to derivate from the results.
The other point is, that I am wondering, whether the Wald-Test is useful to
compare both models?
The standard poisson model has a Wald chi2(22) of 1410,56 and the
generalized Poisson model has a Wald chi2(22) of 1333,46. Does that mean,
the standard model fits better or is the Wald-Test not appropriate for that
comparison?
I would be thankful for any hint.
Thx and have a nice week,
Markus.
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