st: Dear statalist,

["Phillip Sinclair" <sinclairp@Cardiff.ac.uk>]

Dear statalist,

I have a data list of the following form:

1. pupil id ... friend id
2. pupil id ... friend id
3. etc

Each pupil can have several friends, each listed as a separate case i.e. there can be several cases with the same pupil id each case identifying a separate friend.
I wish to create a new variable to identify reciprocated friendship choices  e.g. where pupil A names pupil B as a friend and pupil B names pupil A as a friend.
Please can you tell me of a simple way of doing this in STATA.

Regards,
Philip



++++++++++++++++++++++++++++++++++++
Dr. Philip A. Sinclair PhD (Lond) MSc BSc
Associate Researcher
Cardiff Institute of Society, Health and Ethics,
Cardiff University,
53 Park Place,
Cardiff CF10 3AT,
Wales UK
Tel +44(0)29 2087 9160
++++++++++++++++++++++++++++++++++


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