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Any full text papers written or co-written by the author are available here purely for the purposes of non-profit academic study by other researchers and students. All copyright restrictions apply. These are only here because they provide quicker access than if you asked me for a reprint. As said, all normal copyright and distribution rules apply, and you may not onwardly distribute copies or use these publications unless permitted to by copyright restrictions and laws in your own country, treating the download as an offprint.

Wight, H & Ratcliffe, JH (2024) Aiding or enabling? Officer perspectives on harm reduction and support services in an open-air drug market. Policing and Society.
Heinzeroth, RD & Ratcliffe, JH (2023) More scrutiny, less vigor? How depolicing manifests differently following local rather than nationally-prominent fatal use of force incidents, Policing: A Journal of Policy and Practice.
Ratcliffe, JH & Huffer, M (2023) Quasi-experimental study finding no localised gun crime or call reduction after gun buybacks in Philadelphia. Injury Prevention, 29: 519-524.
Ratcliffe, JH & Taylor, RB (2023) The disproportionate impact of post-George Floyd violence increases on minority neighborhoods in Philadelphia, Journal of Criminal Justice, 88(102103): 1-8.
Ratcliffe, JH (2023) Apples, oranges and aircraft carriers: A comment on Weisburd and colleagues, Policing: A Journal of Policy and Practice, 17: 1-3.
Ratcliffe, JH and Rosenthal, J (2021) ‘Video surveillance of public places, 2nd edition’. Problem-Oriented Guides for Police, Response Guides Series No 4. US Department of Justice (Office of Community Oriented Policing Services): Washington DC.
Ratcliffe, JH & Wight, H (2022) Policing the largest drug market on the eastern seaboard: Officer perspectives on enforcement and community safety, Policing: An International Journal, 45(5): 727-740.
Ratcliffe, JH (2022) Developing evidence-based crime reduction skills in mid-level command staff. In Piza & Welsh (Eds.) The Globalization of Evidence-Based Policing: Innovations in Bridging the Research-Practice Divide. Routledge
Ratcliffe, JH (2021) Policing and public health calls for service in Philadelphia, Crime Science, 10(5): 1-6.
Ratcliffe, JH, Taylor, RB, Askey, AP, Thomas, K, Grasso, J, Bethel, K, Fisher, R, Koehnlein, J (2021) The Philadelphia Predictive Policing Experiment. Journal of Experimental Criminology, 17(1), 15-41.
Taylor, RB, Ratcliffe, JH and Fisher, R (2020) Was the Pope to blame? Statistical powerlessness and the predictive policing of micro-scale randomized control trials, Criminology & Public Policy, 19(3): 965-996.
Liggins, A, Ratcliffe JH, & Bland, M (2019) Targeting the most harmful offenders for an English police agency: Continuity and change of membership in the “Felonious Few”, Cambridge Journal of Evidence-Based Policing, 3(3-4): 80-96.
Weisburd, D., Majmundar, M. K., Aden, H., Braga, A., Bueermann, J., … Ratcliffe, J., Tyler, T. (in press). Proactive policing: A summary of the report of the National Academies of Sciences, Engineering, and Medicine. Asian Journal of Criminology.
Ratcliffe, JH, Taylor, RB, & Fisher, R (2020) Conflicts and congruencies between predictive policing and the patrol officer's craft, Policing and Society, 30(6): 639–655.
Ratcliffe, JH & Kikuchi, G (2019) Harm-focused offender triage and prioritization: A Philadelphia case study, Policing: An International Journal, 42(1): 59-73.
Ratcliffe, JH & Groff, ER (2019) A longitudinal quasi-experimental study of violence and disorder impacts of urban CCTV camera clusters, Criminal Justice Review, 44(2): 148-164.
Ratcliffe, JH, Lattanzio, M, Kikuchi, G, & Thomas, K (2019) A partially randomized field experiment on the effect of an acoustic gunshot detection system on police incident reports, Journal of Experimental Criminology, 15(1): 67-76.
Wheeler, AP & Ratcliffe, JH (2018) A simple weighted displacement difference test to evaluate place based crime interventions, Crime Science, 7(11): 1-9.
Haberman, CP, Sorg, ET & Ratcliffe, JH (2018) The seasons they are a changin: Testing for seasonal effects of potentially criminogenic places on street robbery, Journal of Research in Crime and Delinquency, 55(3): 425-459.
Haberman, CP, Sorg, ET & Ratcliffe, JH (2017) Assessing the validity of the law of crime concentration across different temporal scales, Journal of Quantitative Criminology, 33(3): 547-567.
Sorg, ET, Wood, JD, Groff, ER & Ratcliffe, JH (2017) Explaining dosage diffusion during hot spot patrols: An application of optimal foraging theory to police officer behavior, Justice Quarterly, 34(6): 1044-1068.
Ratcliffe, JH, Perenzin, A & Sorg, RT (2017) Operation Thumbs Down: A quasi-experimental evaluation of an FBI gang takedown in South Central Los Angeles, Policing: An International Journal of Police Strategies and Management, 40(2): 442-458.
Johnson, LT & Ratcliffe, JH (2017) A partial test of the impact of a casino on neighborhood crime, Security Journal, 30(2): 437-452.
Taylor, RB, Ratcliffe, JH & Perenzin, A (2015) Can we predict long-term community crime problems? The estimation of ecological continuity to model risk heterogeneity, Journal of Research in Crime and Delinquency, 52(3): 635-657.
Haberman, CP & Ratcliffe, JH (2015) Testing for temporally differentiated relationships among potentially criminogenic places and census block street robbery counts, Criminology,53(3): 457-483.
Ratcliffe, JH, Groff, ER, Sorg, ET, Haberman, CP (2015) Citizens' reactions to hot spots policing: Impacts on perceptions of crime, disorder, safety and police, Journal of Experimental Criminology,11(3): 393-417.
Groff, ER, Ratcliffe, JH, Haberman, CP, Sorg, ET, Joyce, N and Taylor, RB (2015) Does what police do at hot spots matter? The Philadelphia Policing Tactics Experiment, Criminology, 53(1): 23-53.
Ratcliffe, JH (2015) Towards an index for harm-focused policing, Policing: A Journal of Policy and Practice, 9(2): 164-182.
Ratcliffe, JH (2016) Central American police perception of street gang characteristics, Policing and Society, 26(3): 291-311.
Ratcliffe, JH, Sorg, ET & Rose, JW (2015) Intelligence-led policing in Honduras: Applying Sleipnir and social psychology to understand gang proliferation, Journal of Police and Criminal Psychology,30(2): 112-123.
Haberman, CP, Groff ER, Ratcliffe, JH & Sorg, ET (2016) Satisfaction with police in violent crime hot spots: Using community surveys as a guide for selecting hot spots policing tactics, Crime and Delinquency, 62(4): 525-557.
Wood, JD, Taylor, CJ, Groff, ER, & Ratcliffe, JH (2015) Aligning policing and public health promotion: Insights from the world of foot patrol, Police Practice and Research,16(3): 211-223.
Sorg, ET, Wood, JD, Groff, ER, Ratcliffe, JH (2014) Boundary noncompliance during place-based policing evaluations: A research note, Journal of Research in Crime and Delinquency, 51(3): 377-393.
Ratcliffe, JH, Strang, SJ, Taylor, JH (2014) Assessing the success factors of organized crime groups: Intelligence challenges for strategic thinking, Policing: An International Journal of Police Strategies and Management, 37(1):206-227.
Wood, JD, Sorg, ET, Ratcliffe, JH, Groff, ER, Taylor, CJ (2014) Cops as treatment providers: Realities and ironies of police work in a foot patrol experiment, Policing and Society, 24(3): 362-379.
Johnson, L, Taylor, RB, Ratcliffe, JH (2013) Need drugs, will travel? The distances to crime of illegal drug buyers, Journal of Criminal Justice, 41(3): 178-187.
Sorg, ET, Haberman, CP, Ratcliffe, JH, & Groff, ER (2013) Foot patrol in violent crime hot spots: Longitudinal impacts of deterrence and post treatment effects of displacement, Criminology, 51(1): 65-101.
Groff, ER, Johnson, L, Ratcliffe, JH & Wood, JD (2013) Exploring the relationship between foot and car patrol in violent crime areas, Policing: An International Journal of Police Strategies and Management, 36 (1): 119-139.
Ratcliffe, JH (2012) The spatial extent of criminogenic places on the surrounding environment: A change-point regression of violence around bars, Geographical Analysis, 44(4): 302-320.
Wyant, BR, Taylor, RB, Ratcliffe, JH & Wood, J (2012) Deterrence, firearm arrests, and subsequent shootings: A micro-level spatio-temporal analysis, Justice Quarterly, 29(4): 524-545.
Junger, M, Laycock, G, Hartel, P and Ratcliffe, JH (2012) Crime science: editorial statement. Crime Science, 1(1), 1-3.
Haberman, CP & Ratcliffe, JH (2012) The predictive policing challenges of near repeat armed street robberies, Policing: A Journal of Policy and Practice, 6(2): 151-166.
Ratcliffe, JH, Taniguchi, T, Groff, ER & Wood, JD (2011) The Philadelphia Foot Patrol Experiment: A randomized controlled trial of police patrol effectiveness in violent crime hotspots, Criminology, 49(3): 795-831.
Taniguchi, TA, Ratcliffe, JH & Taylor, RB (2011) Gang set space, drug markets, and crime around drug corners in Camden, Journal of Research in Crime and Delinquency, 48(3): 327-363.
Ratcliffe, JH and Breen, C (2011) Crime diffusion and displacement: Measuring the side effects of police operations, Professional Geographer, 63(2): 230-243.
Ratcliffe, JH (2010) The spatial dependency of crime increase dispersion, Security Journal, 23(1): 18-36.
Ratcliffe, JH and Walden, K (2010) State police and the intelligence center: A study of intelligence flow to and from the street, Journal of the International Association of Law Enforcement Intelligence Analysts, 19(1): 1-19.
Ratcliffe, JH, Taniguchi, T, and Taylor, RB (2009) The crime reduction effects of public CCTV cameras: A multi-method spatial approach, Justice Quarterly, 26(4): 746-770.
McCord, ES and Ratcliffe, JH (2009) Intensity value analysis and the criminogenic effects of land use features on local crime patterns, Crime Patterns and Analysis, 2(1): 17-30.
Ratcliffe, JH and Taniguchi, T (2008) Is crime higher around drug-gang street corners? Two spatial approaches to the relationship between gang set spaces and local crime levels, Crime Patterns and Analysis, 1(1): 23-46.
Townsley, M, Johnson, SD and Ratcliffe, JH (2008) Space time dynamics of insurgent activity in Iraq, Security Journal, 21(3): 139-146.
Ratcliffe, JH and Guidetti, R (2008) State police investigative structure and the adoption of intelligence-led policing, Policing: An International Journal of Police Strategies and Management, 31(1): 109-128.
Ratcliffe, JH and Rengert, GF (2008) Near repeat patterns in Philadelphia shootings, Security Journal, 21(1-2): 58-76.
Ratcliffe, JH (2007) Integrated intelligence and crime analysis: Enhanced information management for law enforcement leaders. Police Foundation: Washington DC.
McCord, ES, Ratcliffe, JH, Garcia, RM & Taylor, RB (2007) Nonresidential crime attractors and generators elevate perceived neighborhood crime and incivilities, Journal of Research in Crime and Delinquency, 44(3): 295-320.
Taylor, RB, Ratcliffe, JH, Dote, L., and Lawton, B (2007) Roles of neighborhood race and status in the middle stages of jury selection, Journal of Criminal Justice, 35(4): 391-403.
Johnson, SD, Bernasco, W, Bowers, KJ, Elffers, H, Ratcliffe, JH, Rengert, GF and Townsley, M (2007) Space-time patterns of risk: A cross national assessment of residential burglary victimization, Journal of Quantitative Criminology, 23 (3): 201-219.
McCord, ES and Ratcliffe, JH (2007) A micro-spatial analysis of the demographic and criminogenic environment of drug markets in Philadelphia, Australian and New Zealand Journal of Criminology, 40(1): 43-63.
Ratcliffe, JH (2006) A temporal constraint theory to explain opportunity-based spatial offending patterns, Journal of Research in Crime and Delinquency, 43 (3): 261-291.
Ratcliffe, JH (2006) Video surveillance of public places. Problem-Oriented Guides for Police, Response Guides Series No 4. US Department of Justice (Office of Community Oriented Policing Services): Washington DC.
Ratcliffe, JH (2005) The effectiveness of police intelligence management: A New Zealand case study, Police Practice and Research, 6 (5): 435-451.
Walsh, P and Ratcliffe, JH (2005) Strategic criminal intelligence education: A collaborative approach, Journal of the International Association of Law Enforcement Intelligence Analysts, 16 (2): 152-166.
Ratcliffe, JH, Biles, D, Green, T. and Miller, S. (2005) Drug-related complaints against police: some findings from a New South Wales study, Policing: An International Journal of Police Strategies and Management, 28 (1): 69-83.
Ratcliffe, JH (2005) Detecting spatial movement of intra-region crime patterns over time, Journal of Quantitative Criminology, 21 (1): 103-123.
Ratcliffe, JH (2004) Crime mapping and the training needs of law enforcement, European Journal on Criminal Policy and Research, 10 (1): 65-83.
Ratcliffe, JH and Makkai, T (2004) Diffusion of benefits: Evaluating a policing operation, Trends and Issues in Crime and Criminal Justice, Australian Institute of Criminology, 278: 1-6.
Ratcliffe, JH (2004) The Hotspot Matrix: A framework for the spatio-temporal targeting of crime reduction, Police Practice and Research, 5 (1): 7-25.
Makkai, T, Ratcliffe, JH, Veraar, K and Collins, L (2004) ACT recidivist offenders, Research and Public Policy Series, 54, Australian Institute of Criminology.
Ratcliffe, JH (2004) Geocoding crime and a first estimate of a minimum acceptable hit rate, International Journal of Geographical Information Science, 18 (1): 61-72.
Ratcliffe, JH (2003) Intelligence-led policing, Trends and Issues in Crime and Criminal Justice, Australian Institute of Criminology, 248: 1-6.
Ratcliffe, JH (2003) Suburb boundaries and residential burglars, Trends and Issues in Crime and Criminal Justice, Australian Institute of Criminology, 246: 1-6.
Ratcliffe, JH (2002) Damned if you don't, damned if you do: Crime mapping and its implications in the real world, Policing and Society. 12 (3): 211-225.
Ratcliffe, JH (2002) Burglary reduction and the myth of displacement, Trends and Issues in Crime and Criminal Justice, Australian Institute of Criminology, 232: 1-6.
Ratcliffe, JH (2002) Aoristic signatures and the temporal analysis of high volume crime patterns, Journal of Quantitative Criminology. 18 (1): 23-43.
Ratcliffe, JH (2002) Intelligence-led policing and the problems of turning rhetoric into practice, Policing and Society. 12 (1): 53-66.
Ratcliffe, JH (2001) Policing urban burglary, Trends and Issues in Crime and Criminal Justice, Australian Institute of Criminology, 213: 1-6.
Ratcliffe, JH (2001) On the accuracy of TIGER type geocoded address data in relation to cadastral and census areal units, International Journal of Geographical Information Science. 15 (5): 473-485.
Ratcliffe, JH & McCullagh, M. (2001) Chasing ghosts? Police perception of high crime areas, British Journal of Criminology, 41 (2): 330-341.
Ratcliffe, JH (2000) Aoristic analysis: the spatial interpretation of unspecific temporal events, International Journal of Geographical Information Science, 14 (7): 669-679.
Dupont, B & Ratcliffe, JH (2000) Juste des punaises sur une carte?: Quelques considerations critiques sur la cartographie criminelle, Les Cahiers de la Securite Interieure, 41: 229-243.
Ratcliffe, JH (2000) Implementing and integrating crime mapping into a police intelligence environment, International Journal of Police Science and Management, 2 (4): 313-323.
Ratcliffe, JH & McCullagh, MJ (1999) Hotbeds of crime and the search for spatial accuracy, Journal of Geographical Systems, 1 (4): 385-398.
Ratcliffe, JH & McCullagh, MJ (1999) Burglary, Victimisation, and Social Deprivation, Crime Prevention and Community Safety: An International Journal, 1 (2): 37-46.
Ratcliffe, JH & McCullagh, MJ (1998) Aoristic crime analysis, International Journal of Geographical Information Science, 12 (7): 751-764.
Ratcliffe, JH & McCullagh, MJ (1998) Identifying repeat victimisation with GIS, British Journal of Criminology, 38 (4): 651-662.
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