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st: NEW COMMAND:Pairdata

From   "Richard J Williamson" <[email protected]>
To   <[email protected]>
Subject   st: NEW COMMAND:Pairdata
Date   Wed, 19 Apr 2006 10:21:54 +0100

Dear Stata list users,

I would like to alert you to a new command called 'pairdata'


pairdata is a command to create paired datasets from individual-per-row
data, specifically useful for twin/sibling data. Three paired datasets are
created: single.dta - single entered file with unique pair combinations;
singlerand.dta- a single entered file with unique pair combinations
controlling for any type of order effect; double.dta - a double entered file
with all possible pair combinations. Two new variables are also created;
famcount - the number of members in each family, nsibpair - the number of
pairs per family. It is also possible to specify variables that are family
specific and so will appear unpaired.


Richard J Williamson
Social Genetic Developmental Psychiatry Research Centre,
Institute of Psychiatry,
Kings College London.
[email protected]

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