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st: adding ammounts

From   Ana Gabriela Guerrero Serdan <>
To   stata listserve <>
Subject   st: adding ammounts
Date   Wed, 22 Apr 2009 08:23:03 -0700 (PDT)

Dear all, 

I am trying to caluculate the total income value for each household in a survey. I have around 30 categories of income. 

Is there a simple way to do so? 

I am using the + operator and Stata reports only zeros. Do you know why? 



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