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st: RE: linking village level data to individual level data


From   "Zhiqiang Wang" <z.wang@uq.edu.au>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: linking village level data to individual level data
Date   Mon, 28 Apr 2008 12:11:18 +1000

Try this: 
. gen vid=substr(pid, 1, 4)

Zhiqiang Wang, PhD
School of Medicine, University of Queensland
Email: z.wang@uq.edu.au

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nirina F
Sent: Monday, 28 April 2008 12:01 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: linking village level data to individual level data

Hello all,

I have individual level data and village level data.
The individual identifiers are 7character variables and start with 4
characters that represent the village where the individual is in.
           .  list pid in 1/5

     +---------+
     |    pid |
     |---------|
  1. | V001002 |
  2. | V001022 |
  3. | V001026 |
  4. | V001032 |
  5. | V001037 |
     +---------+

In the village data, there is village id variable which is similar to
the 4 characters above.
 .  list vid in 1/5

     +---------+
     |    vid  |
     |---------|
  1. | V001 |
  2. | V001 |
  3. | V001 |
  4. | V001 |
  5. | V001 |
     +---------+

My question is:  I don't know how to extract the village identifier
from the individual identifier for me to merge the village level data
into the individual level data.

I know I cannot put any attachement in the statalist emails but I hope
I am clear on my question.
Thank you in advance.
Nirina
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