PROBLEM-ORIENTED POLICING IN VIOLENT CRIME PLACES: A RANDOMIZED CONTROLLED EXPERIMENT*

Over the past decade, problem-oriented policing has become a central strategy for policing. In a number of studies, problem-oriented policing has been found to be effective in reducing crime and disorder. However, very little is known about the value of problem-oriented interventions in controlling violent street crime. The National Academy of Sciences' Panel on the Understanding and Control of Violent Behavior suggests that sustained research on problem-oriented policing initiatives that modify places, routine activities, and situations that promote violence could contribute much to the understanding and control of violence. This study evaluates the effects of problem-oriented policing interventions on urban violent crime problems in Jersey City, New Jersey. Twenty-four high-activity, violent crime places were matched into 12 pairs and one member of each pair was allocated to treatment conditions in a randomized block field experiment. The results of the impact evaluation support the growing body of research that asserts focused police efforts can reduce crime and disorder at problem places without causing crime problems to displace to surrounding areas.     

Permanent beat assignments in association with community policing: Assessing the impact on police officers' field activity

Although the permanent assignment of police officers to their beats has long been an important goal in community policing, its utility has not been assessed empirically. Using a multiple time-series quasi-experimental design, the present study reports on an impact assessment of permanent beat assignment in conjunction with a community policing program implemented in the Philadelphia Housing Authority Police Department. Permanent beat assignment in the treatment sites led to increases in officer-initiated investigative activity (indicating greater responsibility for beats), while no such changes were observed in the comparison sites. Implications for public policy and for conducting police research in public housing are discussed; future research directions are suggested.     

Street-level drug law enforcement: A meta-analytical review⋆

Our paper presents the results of a meta-analytical review of street level drug law enforcement. We conducted a series of meta-analyses to compare and contrast the effectiveness of four types of drug law enforcement approaches, including community-wide policing, problem-oriented/partnership approaches that were geographically focused, hotspots policing and standard, unfocused law enforcement efforts. We examined the relative impact of these different crime control tactics on street-level drug problems as well as associated problems such as property crime, disorder and violent crime. The results of the meta-analyses, together with examination of forest plots, reveal that problem-oriented policing and geographically-focused interventions involving cooperative partnerships between police and third parties tend to be more effective at controlling drug problems than community-wide policing efforts that are unfocused and spread out across a community. But geographically focused and community-wide drug law enforcement interventions that leverage partnerships are more effective at dealing with drug problems than traditional, law enforcement-only interventions. Our results suggest that the key to successful drug law enforcement lies in the capacity of the police to forge productive partnerships with third parties rather than simply increasing police presence or intervention (e.g., arrests) at drug hotspots.

An assessment of the impact of quality-of-life policing on crime and disorder

In this paper we examine the impact of quality-of-life policing on crime and disorder. Specifically, we examine a quality-of-life initiative conducted by the Chandler, Arizona Police Department, which was grounded in an operational strategy of policing social and physical disorder. Using data on calls for service, we employ an interrupted time-series analysis to examine the effect of the intervention on 10 offense categories within the overall target area and within four zones that constitute the target area. The findings suggest that the quality-of-life initiative exerted the strongest effect on two categories of crime and disorder: public morals and physical disorder. Diffusion of benefit and displacement effects were also observed in nearby areas. We discuss the implications of the findings for policy makers and researchers.     

Deterrent effects of police raids on crack houses: A randomized,controlled experiment

We tested the block-level deterrent effects on crime of uniformed police raids of crack houses. Court-authorized raids were legally possible on 207 blocks with at least five calls for police service in the preceding 30 days. Raids were assigned randomly to 104 locations and were conducted at 98 of those sites; the other 109 were left alone. Experimental blocks, in relation to controls, showed reductions in both calls for service and offense reports, but effects were quite small and decayed in two weeks. Raids in which arrests were made (23 of 104 assigned) had no consistently different impact from raids in which no arrests were made. Raids had more effect on calls for service in the winter than in the spring, but we found little seasonal or period difference in effects of raids on offense reports. Alternative police methods may be far more cost-effective than raids in “harm reduction” for crack houses.     

Can “disciplined passion” overcome the cynical view? An empirical inquiry of evaluator influence on police crime prevention program outcomes

Objectives

Investigate the degree and nature of influence that researchers have in police crime prevention programs and whether a high degree of influence is associated with biased reporting of results.

Methods

Meta-analytic inquiry of experimental and quasi-experimental studies (n?=?42), drawn from four Campbell Collaboration systematic reviews of leading police crime prevention strategies: problem-oriented policing, ??hot spots?? policing, ??pulling levers?? policing, and street-level drug enforcement.

Results

Larger program effects are not associated with studies with higher involvement on the part of the evaluator (e.g., assisting in strategy design, monitoring implementation, overcoming implementation problems).

Conclusions

This study does not find support for the cynical view, which holds that researchers have a personal stake in the program or are pressured to report positive results. Importantly, the evaluator??s involvement in the implementation of the program may be a necessary condition of successfully executed police experiments in complex field settings.     

‘Catching’ and ‘Targeting’: Risk‐Based Policing,Local Culture and Gendered Practices

The aim of this article is to explore cultural and practical aspects of the growing use of information and communication technology (ICT) in policing. By using empirical research on policing in Norway, the focus will be on how ICT is used as a crime prevention instrument in everyday police work and culture. The transition, which the new technologies mediate, will be explored by focusing on concepts of risk and materialization of risk‐based policing at the practice level in two cases: 1) a special unit fighting serious and organized crime utilizing proactive policing methods, police informers, crime profiling and databases, and 2) a police station focusing on low‐level crime by using a problem‐oriented policing model, transmitting responsibility for personal security onto identified ‘problem‐owners’.1 ‘Problem‐owner’ is a notion used by the police in the two cases. It is referring to the POP‐model, and whom they identify as important to participate in the risk‐management. According to Wright (: 121): “Partnership refers to a purposeful relationship between the police and the public or between the police and other agencies in the field.” Based on an examination of risk phenomena as contextual, embedded in practice and cultural settings, various stories about risk management will be told. The stories reflect different control strategies in the crime control discourses, and point to how risk‐based technologies are shaped and adapted in occupational culture and practice. The article illuminates the importance of studying the empirical complexity ICT is used in, and looks towards, to paraphrase O'Malley and Palmer (), ‘firewalls of resistance’ in the local occupational culture, that are preventing full integration of risk tools.     

The inchoate nature of community policing: Differences between community policing and traditional police officers

Over the past 20 years, police departments across America have adopted a community—or problem-oriented—policing philosophy. Community policing has not been implemented wholesale, however. Most departments have assigned some officers to community policing roles but kept the majority in traditional motorized patrol assignments. Pertinent literature suggests that these two groups do not see eye to eye on their respective roles and duties. In this study, work-redesign theory is used as a conceptual framework to explain officer functioning in both community policing and traditional motorized policing settings. Findings indicate key similarities between community policing officers and officers assigned to traditional motorized patrol, despite differences in job satisfaction, perception of impact, and policing style.     

Hot spots policing and crime prevention: A systematic review of randomized controlled trials

Crime scholars and practitioners have argued that police actions should be focused on high-risk crime places rather than spread thinly across the urban landscape. This review examines five randomized controlled trials of the effects of concentrating police enforcement efforts on crime hot spots. The findings of these evaluations suggest that focused police actions can prevent crime and disorder in crime hot spots. A meta-analysis of the effect sizes from the five experiments reveals a statistically significant mean effect size for hot spots policing interventions; this suggests overall reductions in citizen calls for service in the treatment hot spots relative to the control hot spots. These studies also suggest that focused police actions at specific locations do not necessarily result in crime displacement. Although these evaluations reveal that these programs work in preventing crime, additional research is needed to unravel other important policy-relevant issues such as community reaction to focused police enforcement efforts.     

Citizens' perceptions of aggressive traffic enforcement strategies

In this study we examine citizens' support for aggressive traffic enforcement strategies and discuss whether the implementation of two different types of traffic enforcement decreases public support. We also examine whether citizens' perceptions of crime, quality of life, and the police are influenced by an increased police presence in their neighborhood. The public opinion data presented here are taken from two experimental target areas and one comparison area. Overall the findings suggest that citizens strongly support aggressive traffic enforcement practices and that the implementation of such strategies does not reduce their support. Residents of areas where police are using these types of tactics do not think that the police are harassing them. Citizens living in one of the experimental areas are significantly more likely to support the police, and think that the police work well with the neighborhood. Residents of the areas that experienced two types of aggressive enforcement, however, did not think that crime had decreased, nor that quality of life had improved. We discuss implications for the use of these strategies and for community policing in general.     

Modelling public confidence of the police: how perceptions of the police differ between neighborhoods in a city

Abstract

This paper presents the results of a survey evaluating the views of 1322 residents of York, UK around their perceptions and attitudes towards crime, their local area, and the police with the aim of understanding the main factors affecting public confidence within the city. The study uses Structural Equation Modelling to develop several models which are evaluated to examine whether differences in public confidence in the police exist across disparate local communities with varying degrees of neighbourhood perceptions. The results indicate that even in a relatively small city such as York, the factors which most affect an individual’s views of the police can vary wildly depending on an individual’s perceptions regarding their local area. The results suggest that policing strategies aimed at improving public confidence must be altered depending on the views residents hold regarding their local communities.     

Women Police

Abstract

This study investigated the use of force by and against women police officers using survey data from a large sample of female and male officers in six departments. Results suggested that female officers and same-gender female-female officer pairs used less force, and were less likely to use physical force, in police-citizen encounters when compared to their male counterparts. There was no evidence supporting the proposition that citizens used less force against female officers compared with male officers. In fact, the findings indicated that citizens used significantly more force against female officers relative to male officers in domestic calls. Although female officers were more likely to engage in underpredicted policing; that is, use less force than the situation would normally dictate, underpredicted policing was not related to an increase in the likelihood of officer injury. Implications for women officers, police use of force, and the institution of policing are discussed.     

A randomized test of initial and residual deterrence from directed patrols and use of license plate readers at crime hot spots

Objectives

To test the effects of short-term police patrol operations using license plate readers (LPRs) on crime and disorder at crime hot spots in Mesa, Arizona.

Methods

The study employed a randomized experimental design. For 15 successive 2-week periods, a four-officer squad conducted short daily operations to detect stolen and other vehicles of interest at randomly selected hot spot road segments at varying times of day. Based on random assignment, the unit operated with LPRs on some routes and conducted extensive manual checks of license plates on others. Using random effects panel models, we examined the impact of these operations on violent, property, drug, disorder, and auto theft offenses as measured by calls for service.

Results

Compared to control conditions with standard patrol strategies, the LPR locations had reductions in calls for drug offenses that lasted for at least several weeks beyond the intervention, while the non-LPR, manual check locations exhibited briefer reductions in calls regarding person offenses and auto theft. There were also indications of crime displacement associated with some offenses, particularly drug offenses.

Conclusions

The findings suggest that use of LPRs can reduce certain types of offenses at hot spots and that rotation of short-term LPR operations across hot spots may be an effective way for police agencies to employ small numbers of LPR devices. More generally, the results also provide some support for Sherman’s (1990) crackdown theory, which suggests that police can improve their effectiveness in preventing crime through frequent rotation of short-term crackdowns across targets, as it applies to hot spot policing.     

Book review essay

This article examines changes in organizational priorities related to the three core functions of American policing—crime control, the maintenance of order, and the provision of services—during the era of community-oriented policing (COP). The change in priorities is analyzed using panel data from three national surveys of more than 200 municipal police departments conducted in 1993, 1996, and 2000. The primary finding is that police core-function priorities remained largely unchanged during this period. However, the systematic implementation of COP programs reflects an all-out effort to address all three core functions of policing at a higher level of achievement.     

Proactive Policing: a Summary of the Report of the National Academies of Sciences,Engineering, and Medicine

This paper provides a summary of our report for the National Academy of Sciences, Engineering, and Medicine on proactive policing. We find that there is sufficient scientific evidence to support the adoption of many proactive policing practices if the primary goal is to reduce crime, though the evidence base generally does not provide long-term or jurisdictional estimates. In turn, we conclude that crime prevention outcomes can often be obtained without producing negative community reactions. However, the most effective proactive policing strategies do not appear to have strong positive impacts on citizen perceptions of the police. At the same time, some community-based strategies have begun to show evidence of improving the relations between the police and public. We conclude that there are likely to be large racial disparities in the volume and nature of police–citizen encounters when police target high-risk people or high-risk places, as is common in many proactive policing programs. We could not conclude whether such disparities are due to statistical prediction, racial animus, implicit bias, or other causes.

     

Applications of GIS in Public Security Agencies in China

The application of GIS in the public security industry is generally called “Police Geographic Information System (PGIS)” in Mainland China. Although China’s PGIS play important roles in protecting public safety and smart policing, no publications on this subject are found in English. This paper provides an overview of the four main development stages of PGIS in public security agencies in mainland China: the early exploration stage; the multi-department PGIS system development stage; the centralization stage; and the spread and improvement stage. Successful GIS applications and practices in local police departments are also introduced in this paper. At the end of this paper, three problems and challenges faced in the development of PGIS are introduced, involving the current PGIS application depth; the support of crime mapping and crime analysis theoretical research on policing practices; and the introduction and localization of mature foreign crime analysis and prediction technology. Additionally, we point out that the implementation of smart policing strategies under the context of big data has created favorable conditions for subsequent crime analysis, research, and application, encouraging police departments to more frequently take initiative by cooperating with research institutions in crime analysis and prediction technology research. These new opportunities will inevitably promote the rapid development of PGIS and the geography of crime in China.

     

Policing a Negotiated World: A Partial Test of Klinger’s Ecological Theory of Policing

Objectives

Klinger’s (Criminology 35(2): 277–306, 1997) ecological theory of policing addresses the intersection of environment and police organizational structure on police patrol practices. The current study addresses the following question: ‘Is police response to calls for service influenced by the level of serious violent crime or the level of officer staffing?’

Methods

This question was addressed using crime, incident, and staffing data supplied by the Philadelphia Police Department. The dependent variable was the number of unfounded events per month, per police district, from 2004 to 2008. Analysis controlled for linear and non-linear trends, average monthly temperature, month length, and spatial effects. Data were analyzed using repeated measures multilevel modeling.

Results

Findings suggested that the quantity of unfounded events was associated with both workload and officer staffing levels. Consistent with theoretical predictions, higher workload was associated with more unfounded incidents while higher levels of officer staffing was associated with fewer unfounded incidents, net of ongoing trends and spatial effects.

Conclusions

These findings are consistent with the Ecological Theory of Policing and suggest that officers may shed workload in response to higher demands for service or lower levels of officer availability.

     

Preparing individuals for leadership in Australasia,the United States,and the UK

ABSTRACT

Much is said about the importance of leadership in policing. In policing leadership is a key variable in organisational effectiveness, public confidence and employee well-being. We demand that our police leaders are ethical, decisive, skilled, and have the internal and external legitimacy needed to exert influence inside and outside the workplace. There are many advantages to such a pipeline approach to organisational leadership, and it presents organisations with an unparalleled opportunity to develop leaders and leadership talent over an extended period. There are questions, of course, about how much advantage our police organisations really take of this opportunity; how coherently leader development is planned and organised; and how effective our development models are. In this paper, we explore leader development in Australia, the United States and the United Kingdom. Drawing on data collected through semi-structured interviews with established senior police leaders in each country we explore development journeys, opportunities for learning inside and outside of policing, the impact of leader development on leadership-style and decision-making, and how well-prepared leaders feel for their roles having transited their organisational pipelines. Drawing on these data we present a model for leadership development that calls for individual and organisational work. By seeing leadership in terms of organisation capacity, rather than individual capacity, the model encourages a comprehensive and more cohesive approach through police education and other initiatives to developing our organisational leaders, and recognises too that preparing individuals is only part of the story.     

How Much Time Should the Police Spend at Crime Hot Spots? Answers from a Police Agency Directed Randomized Field Trial in Sacramento,California

Hot spots policing has been shown to be an effective strategy for reducing crime across a number of rigorous evaluations, but despite this strong body of research, there still exist gaps in our knowledge of how officers can best respond to hot spots. We report on a randomized experiment in Sacramento, California that begins to address these gaps by testing the recommendation from prior research that police officers randomly rotate between hot spots, spending about 15?min patrolling in each. Our results suggest significant overall declines in both calls for service and crime incidents in the treatment hot spots relative to the controls. Additionally, the study was carried out primarily by the Sacramento Police Department without any outside funding. In an era of limited economic resources for policing, this experiment suggests a model by which police agencies can take ownership of science and oversee the implementation and evaluation of evidence-based interventions.     

POLICING CRIME AND DISORDER HOT SPOTS: A RANDOMIZED CONTROLLED TRIAL*

Dealing with physical and social disorder to prevent serious crime has become a central strategy for policing. This study evaluates the effects of policing disorder, within a problem‐oriented policing framework, at crime and disorder hot spots in Lowell, Massachusetts. Thirty‐four hot spots were matched into 17 pairs, and one member of each pair was allocated to treatment conditions in a randomized block field experiment. The officers engaged “shallow” problem solving and implemented a strategy that more closely resembled a general policing disorder strategy rather than carefully designed problem‐oriented policing responses. Nevertheless, the impact evaluation revealed significant reductions in crime and disorder calls for service, and systematic observations of social and physical disorder at the treatment places relative to the control places uncovered no evidence of significant crime displacement. A mediation analysis of the isolated and exhaustive causal mechanisms that comprised the strategy revealed that the strongest crime‐prevention gains were generated by situational prevention strategies rather than by misdemeanor arrests or social service strategies.