Dear Statusers,
I'm having some problems to test the IIA assumption after runing a
multinomial logit model with 3 categories.
I tried to use two different statauser's packages (iia and mlogtest) and got
the same error message (see bellow).
Does any one has any idea how to solve this?
. mlogtest, iia
**** Hausman tests of IIA assumption
Ho: Odds(Outcome-J vs Outcome-K) are independent of other alternatives.
no coefficients in common; specify equations(matchlist)
for problems with different equation names.
r(498); t=0.32 14:23:40
. iia
no coefficients in common; specify equations(matchlist)
for problems with different equation names.
r(498); t=0.33 14:24:39
many thanks,
JP
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