Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: IIA test


From   marilena locatelli <marilena.locatelli@unito.it>
To   statalist@hsphsun2.harvard.edu
Subject   st: IIA test
Date   Wed, 19 Feb 2003 09:34:38 +0100

Dear all,
I would like to ask a question. I want to run a multinomial logit and I
have 6 alternatives:
1. not working and not using child care (baseline group)
2. not working and  using child care
3. working part time and not using child care
4. working part time and  using child care
5. working full time and not using child care
6. working full time and  using child care

When I try to test the hypothesis of Independence of irrelelevant
alternatives, by typing mtestlog,hausman,
I get the following error message:

*** 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 the problem of different equation names.
r(498);

Why is that?
Many thanks in advance for your help
Best
Marilena

--

Dott.ssa Marilena Locatelli
Research Fellow
Universita' di Torino - Dipartimento di Economia
Via Po 53 - 10124 Torino, Italy
tel. +39 011 6702761
fax  +39 011 6702762
e-mail: marilena.locatelli@unito.it
web     http://www.de.unito.it/web/member/locatelli/personal-inf.htm
and  http://www.child-centre.it/



_____________________________________________________________________
For your security, this mail has been scanned and protected by Inflex

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index