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st: IV parameter nlogit model
From
"Karin Oudshoorn, Twentestat" <[email protected]>
To
[email protected]
Subject
st: IV parameter nlogit model
Date
Thu, 20 Dec 2012 21:41:27 +0100
Dear Stata-users,
I am estimating a nested logit model on a conjoint dataset with a degenerate branche ( for no screening) and a branche of two alternatives.
I constrain the IV parameter of the degenerate branch to one.
So now I get an estimate for the other IV parameter which is 1.89 and the test for IIA(tau=1) is significant.
How can I interpret this IV parameter?
It is above one. So do I have a problem now?
And what does the test IIA ( tau=1) tell me on the two choices ( for or againdt screening) and between the two alternatives?
Thanks in advance,
Karin
Verstuurd vanaf mijn iPhone
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