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st: Splitting panel in 3 groups: gen byte


From   John Antonakis <john.antonakis@unil.ch>
To   statalist@hsphsun2.harvard.edu
Subject   st: Splitting panel in 3 groups: gen byte
Date   Wed, 17 Jun 2009 09:47:09 +0200

Hi:

Martin recently helped with me with some code, to randomly split panel data equally into two groups (which I then collapsed afterwards).

I am trying to understand the code regarding the split. My panel identifier is "i".

I had:

gen random=runiform()
sort i random
by i: gen byte group=cond(_n<=_N/2,1,2)

So, how to I split into 3 groups or 4 groups? I am not sure what the "gen byte" command does and how the numbers 2,1,2 relate to the command.

Thank you in advance,
John.

--
____________________________________________________

Prof. John Antonakis
Associate Dean Faculty of Business and Economics
University of Lausanne
Internef #618
CH-1015 Lausanne-Dorigny
Switzerland

Tel ++41 (0)21 692-3438
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Personal page:
http://www.hec.unil.ch/jantonakis
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