title: Beyond the ecological fallacy: potential problems when studying healthcare organisations.
authors.affiliation: Cambridge Centre for Health Services Research, University of Cambridge, Cambridge, UK RAND Europe, Cambridge, UK csaunder@rand.org.
authors.forename: Catherine L
authors.initials: CL
authors.lastname: Saunders
authors.affiliation: RAND Corporation, Santa Monica, CA, USA.
authors.forename: Marc N
authors.initials: MN
authors.lastname: Elliott
authors.affiliation: Cambridge Centre for Health Services Research, University of Cambridge, Cambridge, UK Health Behaviour Research Centre, Department of Epidemiology & Public Health, University College London, London, UK.
authors.forename: Georgios
authors.initials: G
authors.lastname: Lyratzopoulos
authors.affiliation: Cambridge Centre for Health Services Research, University of Cambridge, Cambridge, UK.
authors.forename: Gary A
authors.initials: GA
authors.lastname: Abel
mesh_terms: D015982:Bias; D003695:Delivery of Health Care / Q000592:standards*; D006296:Health Services / Q000592:standards*; D006302:Health Services Research; D006761:Hospitals / Q000592:standards; D006801:Humans; D012107:Research Design