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st: Deleting Only Particular Observations

From   Christian Weiß <>
Subject   st: Deleting Only Particular Observations
Date   Wed, 1 Jul 2009 22:24:44 +0200

Dear Statalist,

Variable size contains the marketcap of about 2000 firms from 11
countries (grouping var country).

I would like to keep only the 100 biggest firms (by marketcap) from
each country, and delete the residual observations.

How can I accomplish this?

Best regards
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