Dear listers,
I performed a rologit and I want to test for the IIA assumption.
I used a hausmantest, but I also want to test using the suest command.
I used this code:
rologit rank prov att dist costs tech, group (id) nolog reverse
estimates store fullbase, title (all cards)
rologit rank prov att dist costs tech if cards ! = 1, group (id) nolog reverse
estimates store card1base, title (remove card1)
suest fullbase card1base
Then I get the following error-message:
unable to generate scores for model.
suest requires that predict allow the score option.
r(322);
What am I doing wrong?
Many thanks,
Bart
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