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Re: st: multinomial logistic regression: adjacent logits
At 04:44 PM 9/29/2005, Yi-Fu Chen wrote:
I want to run a four-category multinomial logistic model and I find the
comparison will be more interesting for me if I use adjacent logits.
Does anyone know how to do multinomial logistic regression with adjacent
It seems mlogit only provides baseline logits.
Any suggestions are appriciated.
In an older version of Stata I did this through -mlogit- and using
-constraint- for the constraints b_j = (J-j)*b. I think this is still what
you need to do.
Example: Y is the outcome (let's say it takes on values 0, 1, and 2) and X
and Z are predictors.
. constraint define 1 x =2*x
. constraint define 2 z =2*z
. mlogit y x z, basecategory(0) constraint(1 2)
You can assess fit by comparing unconstrained and constrained models (see
Stata manual for mlogit, constrained models).
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Thomas Jefferson University, Division of Biostatistics,
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