st: Creating a variable with the highest value from two other variables

[Christer Thrane <lineea@broadpark.no>]

Hi,

I have two income measures, X and Y. I want to create a variable, Z, that is 
equal to X for those obs where X>=Y and equal to Y for those obs where Y>X. 
Like this:

id    X    Y       Z
1    12    11    12
2    10    10    10
3    10    12    12

Is there a simple way?

BR,

Christer 
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