I am trying to estimate choices about living arrangements
by a multinomial logit (mlogit).
If I use more than one dummy variable (ex regional
dummies, or sex and a dummy for employee) stata fails to
compute standard errors of the coefficient of the constant
term (they are missing in the output table and zero in the
variance/covariance matrix).
How can I solve my problem?
Thanks.
Serena Trucchi
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