在做多项Logit回归,被解释变量为3个,解释变量5个,mlogit回归后,想用mlogtest,hausman base检验模型是否服从IIA假定,但是输入命令后,总是出现这种状况是怎么回事呢?
. mlogtest,hausman base
Problem determining number of categories.
**** Hausman tests of IIA assumption
Ho: Odds(Outcome-J vs Outcome-K) are independent of other alternatives.
You used the old syntax of hausman. Click here to learn about the new syntax.
(storing estimation results as _HAUSMAN)
no coefficients in common; specify equations(matchlist)
for problems with different equation names.
r(498);


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