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st: How to create a pesonal ID applied to whole panel dataset?


From   Yibing Wang <wang_yibing@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: How to create a pesonal ID applied to whole panel dataset?
Date   Sun, 15 Oct 2006 23:51:15 -0700 (PDT)

Dear Statalisters,

I'm relatively new to Stata, I have a dataset as
follows:

hhid  psid  year
1     1     1989
1     1     1991
1     1     1993
1     1     2000
1     2     1989
1     2     1991
1     2     1993
1     2     2000
2     1     1989
2     1     1991
2     1     1993
2     1     2000
...   ...   ...
hhid=household ID
psid=personal ID within a household
And my question is how to create a personal ID (say
uid) applied to the whold panel dataset that looks
like:
hhid  psid  year  uid
1     1     1989    1
1     1     1991    1
1     1     1993    1
1     1     2000    1
1     2     1989    2
1     2     1991    2
1     2     1993    2
1     2     2000    2
2     1     1989    3
2     1     1991    3
2     1     1993    3
2     1     2000    3
...  ...   ...     ....

Any help would be highly appreciated.

Thanks,

Eric Wang


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