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st: additive weighted index

From   andreia tolciu <[email protected]>
To   [email protected]
Subject   st: additive weighted index
Date   Wed, 12 Dec 2007 02:00:03 -0800 (PST)

Dear Statalisters,

I want to build an additive weighted index from 3
indicators from a survey (I have in total 2,111
observations and 61 variables). 

The form for the index can be:
 a * Indicator I + b * Indicator II + c * Indicator

a= 1/4

Does anyone have an idea how this would work with

(Each indicator from the 3 which I would like to use
has 4 values: �1- totally agree�, �2 -I rather agree�,
�3-I rather disagree�, �4- I totally disagree�)       

Thank you very much in advance for your help,

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