Re: st: newbie if {} else {} question

[John Hennen <jhennen@mclean.org>]

Richard Herrell wrote (in part):

> I've just started learning Stata syntax after long years of SAS use and am
> completely stumped by a result.  I want to create a new 4-level variable
> (ascertgp) based on the crosstabulation of 2 dichotomous variables (probip
> and promig).

Try
egen ascertgp = group(probip promig)


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