Re: st: a question about gologit2 mlogit and ologit

[Gordon Hughes <G.A.Hughes@ed.ac.uk>]

Mr Zhang,

Please have some consideration for other contributors to 
Statalist.  First, people are not just waiting to answer your 
question - especially not on a weekend.  Second, think more carefully 
about what you want to ask before sending message.

The procedure -gologit2- is user-written, while the -mlogit- and 
-ologit- procedures are part of Stata.  Hence the syntax of the 
procedures may differ, which will affect the use of factorial 
notation.  You don't say whether your variables a and b are 
categorical or continuous.  These and other considerations will 
affect the answer to your question.

The simplest response is that you should create your own interactions 
and test them in your model.  I have no idea whether this would make 
statistical or any other kind of sense, but you have not provided 
sufficient information to go any further.

Gordon Hughes
g.a.hughes@ed.ac.uk

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