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st: sequential logit model


From   "Jun Xu" <mystata@hotmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: sequential logit model
Date   Wed, 26 Feb 2003 15:34:21 -0600

Stata Listers:

I have the following setup of discrete choice (first register and then vote) model. Peole make decision along the road. They first need to choose between branch 1 and 2, and then those choose branch 2 go ahead making their second decisions of choosing either branch 3 or 4. I am not sure if I could go ahead using nlogit, but it seems that I need to have choice specific attributes, whereas my data set contains only individual characteristics. Not sure if there is any routine that can estimate the following model, where B and X's are specific to each decision stage. Also, X1 and X2 might have some overlap.

--------branch 1: F(B1X1)
|
|
|
|
|___branch 2: 1-F(B1X1)
|
|
|
|
|____branch 3:(1-F(B1X1))F(B2X2)
|
|
|
|____branch 4:(1-F(B1X1))(1-F(B2X2))

Thanks a lot.

Jun Xu
Department of Sociology
Indiana University at Bloomington



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