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st: multinomial logit on grouped data


From   "A. Mushfiq Mobarak" <Ahmed.Mobarak@Colorado.EDU>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: multinomial logit on grouped data
Date   Fri, 11 Jul 2003 14:25:43 -0600

Dear Listers,

Stata can perform logit/probit estimation on grouped data (see blogit,
bprobit), where the dependent variable is fraction of positive responses
in the group rather than an individual's 0-1 response. 

Can it perform multinomial logit estimation on grouped data?

Specifically, the type of estimation I'm trying to do is the following:

My dependent variable has 4 categories:

y0: electricity usage by industrial groups
y1: electricity usage by agriculture
y2: electricity usage by consumers
y3: electricity usage by others

I can express these as fraction of electricity used by each of the 4
groups.  I would like to explain this composition of electricity use as
a function of a number of independent variables (e.g. the size of each
group, political conditions in the country, etc.)

Maybe multinomial logit is not even the right way to think about it, and
would like to hear other suggestions if that's the case. It seems that
LIMDEP allows you to do the multinomial logit on grouped data estimation
(see http://www.limdep.com/On_Line_Help/lim00320.htm). I would rather do
this on Stata.

Thank you in advance for your help. Since I get the digest, copying your
response to mobarak@spot.colorado.edu would be appreciated.

Best,
Mushfiq

 


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