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Theory and methods
Changing the environment to improve population health: a framework for considering exposure in natural experimental studies
- Correspondence to Dr David K Humphreys, Department of Social Policy and Intervention, University of Oxford, 32 Wellington Square, Oxford OX1 2ER, UK; david.humphreys{at}spi.ox.ac.uk
Citation
Changing the environment to improve population health: a framework for considering exposure in natural experimental studies
Publication history
- Received July 17, 2015
- Revised December 8, 2015
- Accepted March 18, 2016
- First published April 7, 2016.
Online issue publication
November 04, 2017
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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/ This is an Open Access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 4.0) license, which permits others to distribute, remix, adapt and build upon this work, for commercial use, provided the original work is properly cited. See: http://creativecommons.org/licenses/by/4.0/