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st: adding ammounts in Stata

From   Ana Gabriela Guerrero Serdan <>
Subject   st: adding ammounts in Stata
Date   Thu, 23 Apr 2009 00:04:01 -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 and want to add them and also create sub-categories. 

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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