Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: drawing two stage random samples
From
Shehzad Ali <[email protected]>
To
Stata List <[email protected]>
Subject
st: drawing two stage random samples
Date
Tue, 29 May 2012 12:34:59 +0100 (BST)
Hi listers,
I am looking to draw a random sample from my dataset that has nested levels, i.e. patients (pt_id) nested within physicians (doc-id). I would like to randomly sample physicians (say 20%) and then randomly sample patients (say 20%) from the randomly selected physicians. The data is in long form with unique pt_id that are nested within doc_id.
Any advice would be appreciated.
Many thanks
Shehzad
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/