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dc.contributor.authorAriel, B
dc.contributor.authorSutherland, A
dc.contributor.authorSherman, LW
dc.date.accessioned2018-12-12T00:30:26Z
dc.date.available2018-12-12T00:30:26Z
dc.date.issued2019
dc.identifier.issn1573-3750
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286680
dc.description.abstractABSTRACT Objectives: A central issue in experiments is protecting the integrity of causal identification from treatment spillover effects. The objective of this article is to demonstrate a bright line beyond which spillover of treatment renders experimental results misleading. We focus on a highly publicized recent test of police body-cameras that violated the key assumption of a valid experiment: independence of treatment conditions for each unit of analysis. Methods: In this article, we set out arguments for and against particular units of random assignment in relation to protecting against spillover effects that violate the Stable Unit Transfer Value Assumption (SUTVA). Results: Comparisons to methodological solutions from other disciplines demonstrate several ways of dealing with interference in experiments, all of which give priority to causal identification over sample size as the best pathway to statistical power. Conclusions: Researchers contemplating which units of analysis to randomize can use the case of police body-worn cameras to argue against research designs that guarantee large spillover effects. Key Words: Body-worn Cameras; Unit of Randomization; Spillover Effects; SUTVA; Interference; Partial Interference; Experiments
dc.publisherSpringer Science and Business Media LLC
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titlePreventing treatment spillover contamination in criminological field experiments: the case of body-worn police cameras
dc.typeArticle
prism.endingPage591
prism.issueIdentifier4
prism.publicationDate2019
prism.publicationNameJournal of Experimental Criminology
prism.startingPage569
prism.volume15
dc.identifier.doi10.17863/CAM.33987
dcterms.dateAccepted2018-09-21
rioxxterms.versionofrecord10.1007/s11292-018-9344-4
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2019-12-01
dc.contributor.orcidAriel, Barak [0000-0002-6912-2546]
dc.identifier.eissn1572-8315
rioxxterms.typeJournal Article/Review
cam.issuedOnline2018-11-27


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International