IAA is violated. But we have only case-specific variables.

[Gunnar Breustedt]

Dear all,
we have a choice problem with three alternatives, which are similar to three occupations among which a person can choose. Despite an alternative-specific constant we have only case-specific variables, such as personal charateristics. The IAA does not hold. Consequently, mlogit or mprobit is not suitable. But, alternatives such as nested logit (since we need at least two alternatives in each branch of the decision tree) or asmprobit and mixed logit (we do not have alternative specific variables) do not work either. What can we do? Thank you very much for any idea or hint. Gunnar

[Charlie Joyez]

An alternative specific conditional logit (McFadden 1974) would probably work.

help asclogit

webuse choice,clear

asclogit choice , case(id) alternatives(car) casevars(sex income)

Only individual-specific variables (casevars) are included to explain the choice among 3 alternatives

Best,
Charlie