st: Imputation using ML for a lognormal ordered income variable

[Tinna Asgeirsdottir <statalist.tla@gmail.com>]

Dear Stata users,

In my data I have income in 13 groups. The top group is open ended. I
am trying to impute sensible values and would like to use this as a
continuous variable. I am especially concerned about the top category.
 It has been suggested to me that I should use STATA´s ML command in
stead of using each categories mid-point. I am having trouble finding
what I need on the internet. Thus I wonder if anyone can tell me how
to fit a lognormal distribution to the variable and subsequently infer
the average income in the top bracket. If you know how to do this in
general for all the categories that is great as well as the
distributions over the other brackets is surely not uniform. However,
I think finding a good solution for my top category is the most
important thing though.

Best regards,
Tinna

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