Dear R helpers
I have a question regarding the constrainOptim.
I'm coding the nested logit and would like to set a bound of rho to (0,1] as an
extreme value distribution where rho = exp(lambda)/1+exp(lambda)
I wonder if I can do that directly in optim (say rho > 0 & <= 1) or need to use
constrainOptim
I read the help but still don't know how to set ui and ci
Thanks,
June
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