st: adding ammounts

[Ana Gabriela Guerrero Serdan <ag_guerreroserdan@yahoo.com>]

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? 

thanks, 

gaby 


      
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