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Lookup NU author(s): Dr Michael GraylingORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Stata Press, 2018.
For re-use rights please refer to the publisher's terms and conditions.
Author(s): Grayling MJ, Mander AP
Publication type: Article
Publication status: Published
Journal: The Stata Journal
Print publication date: 01/12/2018
Online publication date: 01/12/2018
Acceptance date: 17/07/2018
Date deposited: 08/03/2019
ISSN (print): 1536-867X
ISSN (electronic): 1536-8734
Publisher: Stata Press
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