在stata里做了多元回归,被解释变量有一个,是代表行业分类的变量,分别用1、2、3、4。。。表示。解释变量有连续变量,也有虚拟变量。想用mlogtest,hausman base检验模型是否服从IIA假定,但是输入命令后,总是出现这种提示是什么意思呢,是和被解释变量的类型有关吗?
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)
factor variables and time-series operators not allowed
r(101);


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