st: nlogit nesting scheme for 3-level degenerate model: data structure

[John Fulton <fulton@ssc.wisc.edu>]

Hi.  I'm setting up data for nlogitrum.  In terms of the nlogitrum 
command, I have two nests at the altsetvar1 level (top level).  One of 
these is degenerate with an elemental choice at the altsetvarB (bottom) 
level.  What do I do for the altsetvar2 level for this nest?  Should it 
have a nest of its own that is degenerate on level 2 as well?  None of 
the examples of data management for degenerate nests I've found have 
dealt with three-level models.
Thank you.
John.


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