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578 Annals Am. Acad. Pol. & Soc. Sci. 8 (2001)

handle is hein.cow/anamacp0578 and id is 1 raw text is: PREFACE

The main aims of this special issue of The Annals are to examine the
systematic review method and to report on some of its contributions to evi-
dence-based crime prevention. The main title of this issue, What Works in
Preventing Crime? signals our primary interest in identifying those inter-
ventions that are effective in preventing crime and offending and that ulti-
mately may lead to more effective crime prevention policy and practice. The
issue's subtitle, Systematic Reviews of Experimental and Quasi-Experimen-
tal Research, signals our interest in using the most rigorous methods of
research synthesis and only the highest-quality research designs to evaluate
the effectiveness of criminological interventions.
Systematic reviews have received increased attention in recent years in
the social sciences generally and in criminology and criminal justice specifi-
cally. This is part of the broader interest in evidence-based policy and practice
in public services (Davies, Nutley, and Smith 2000) and evidence-based crime
prevention (Sherman et al. 1997, forthcoming).
At the forefront of the development of systematic reviews is the newly
formed Campbell Collaboration. Named after the influential experimental
psychologist Donald T. Campbell (1969), this was set up for the purpose of pre-
paring, maintaining, and disseminating evidence-based research on the
effects of interventions in the fields of education, social welfare, and crime
and justice. Its Crime and Justice Group aims to prepare and maintain sys-
tematic reviews of criminological interventions and to make them accessible
electronically to scholars, practitioners, policy makers, and the general pub-
lic. The present work, although not officially carried out under the auspices of
the Campbell Collaboration, represents an important contribution to its
Crime and Justice Group, and the four systematic reviews reported here are
undergoing review by the Campbell Collaboration; it is hoped that they will
be approved and disseminated as Campbell reviews in due course.
This issue of The Annals introduces the path-breaking work of the Camp-
bell Collaboration and its Crime and Justice Group, examines key method-
ological issues facing systematic reviews of criminological interventions,
reports on four original systematic reviews of the effects of different interven-
tions on crime and offending, and makes progress toward an evidence-based
approach to preventing crime and offending. Throughout this issue, crime
prevention is defined as any program or policy that causes a lower number of
crimes to occur in the future than would have occurred without that program
or policy.
This special issue originated with the 2001 Jerry Lee Crime Prevention
Symposium, a 2-day conference on systematic reviews of criminological inter-
ventions, held in early April at the University of Maryland, College Park, and
at the U.S. capitol building in Washington, D.C. Convened by the University of
Maryland's Department of Criminology and Criminal Justice and sponsored

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