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st: RE: IPF troubles


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: IPF troubles
Date   Fri, 15 May 2009 15:52:39 +0100

-ipf- is from SSC. Please remember to specify where user-written
programs you refer to come from. 

I think you are misreading the syntax -fit(string)-, which doesn't mean
that covariates should be string variables. 

Nick 
n.j.cox@durham.ac.uk 

Andrew Criswell

This seems like a straight forward example. But I don't understand why
it fails. I am using version 10.1

input str6 gender str8 party wgt
gender party wgt
male democrat 55
male repub 65
female democrat 50
female repub 30
end

. ipf [fweight = wgt], fit(gender + party)
Deleting all matrices......

Expansion of the various marginal models
----------------------------------------
marginal model 1 varlist :  gender
marginal model 2 varlist :  party
type mismatch
r(109);

end of do-file

r(109);

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