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st: data management

From   "Alexander Staus" <>
Subject   st: data management
Date   Wed, 16 May 2007 12:11:34 +0200

Dear Stata users,

I want to combine different observations in a panel dataset. e.g. for hh 72 (=id) I want to sum 
the variable "value" if the firm is the same on one date, but other variables just stay as they 

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