Yes. See the help for -fillin- and more
explicitly SJ Tip 17 in Stata Journal 5(1) 2005.
Nick
n.j.cox@durham.ac.uk
Prahm, Jeremy
> This question concerns the set up of data for estimation using nlogit
> and nlogitrum commands.
>
> Do I need to populate the dataset with observations for all
> the choices
> the individual did not make? Let "chosen" be the dependent
> variable, I
> only have data for the observations where "chosen" equals 1. For
> example, of possible choices: A, B, C, D, I have an observation that
> they selected D and can set the variable "chosen" equal to 1.
> Do I need
> to generate three more observations where "chosen" takes a value of 0
> for choices A, B, and C, thus making my dataset 4 times as large? My
> understanding is that I do, but it doesn't seem to be very efficient
> considering I have a very large dataset. Thanks in advance for any
> help.
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