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st: Question on data management

From   "Simo Hansen" <>
To   <>
Subject   st: Question on data management
Date   Wed, 9 May 2007 13:11:58 +0300

Dear All,
I have the children data that includes household id, children's age and
children's birth date.
Using this information, I want to create new three variables;
1. Age difference between children
2. Preceding birth interval
3. Succeeding birth interval

Could you help me how to calculate these new three variables?
Thanks for your kind help in advance.
Best regards,

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