st: nested logit with only individual characteristics

["Fanwell Kenala Bokosi" <fanwellbokosi@onetel.net>]

Dear Listers,

I am trying to estimate a nested logit with data that has only indivudual 
characteristics.

I have a data set of 291 households with househoold characteristics and 
their poverty statsu in two period.

The dependent variable is 1=poor and 0=non poor for both years. I want to 
estimate the probaliity of being poor in the secons period given the povery 
status of the first period.

The tree structure is as follows:

pooryr1 (pooryr2, nonpooryr2)
Nonpooryr1(pooryr2, nonpooryr2)

The household characteristics include rnd1qno ageh hhize landarea children 
etc

the group variable is rnd1qno

I do not know how I should set the command since I do not have any choice 
related independent variables

Please help


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