If I'm not wrong, the test for IIA is the Hausman test.
Look for hausman.systemfit in the systemfit package.
Gilbert
----- Original Message -----
From: "Erika Known" <[EMAIL PROTECTED]>
To: <r-help@r-project.org>
Sent: Tuesday, October 14, 2008 11:43 AM
Subject: [R] IAA test on my multinomial logit
Hi all
I'm trying to immigrate from Stata and I want to preform a IIA test
(Independence of Irrelevant Alternatives) on my multinomial logit model
in R, but I can't seem to find a package that dos the trick. I've been
looking at
http://bm2.genes.nig.ac.jp/RGM2/R_current/library/systemfit/man/hausman.systemfit.html
but I can't figure out what to do! I normally just type 'mlogtest,
hausman base' to get the test in Stata. I can even use 'mlogtest,
smhsiao base' to get the Small-Hsiao tests of IIA assumption.
according to the literature there is also other tests.. thou I cant seem
to find any off them in R.
Thank for the help.
Erika
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