I am using the gmnl model in STATA and I am trying to change the distribution of one of the random parameters of a variable to log-normal. I am not finding anything on the gmnl information in Stata about how to do this.

I know that for the mixed logit, I can do this with the option "ln()", but I have tried using this option, and it does not work with the gmnl package. If anyone can provide some information on how to make this change, I would much appreciate it.