RANDOM ASSIGNMENT TO TREATMENT GROUPS:

A persistent problem in evaluation research relates to the difficulty of using true experimental designs. In particular, random assignment of subjects to treatment groups is both very important to insure the internal validity of the design and very difficult to implement due to logistical and ethical aspects of field research. This paper reports on a strategy for randomization which was adapted to judicial research: specifically to the evaluation of o program for adjudicating minor traffic offenders. It is demonstrated that through careful planning and coordination, designs involving random assignment can be instituted without involving significant difficulties.     

A Recent Visit to Central Africa

Mr. Wood, the Conservative Member of Parliament who led a parliamentarydelegation which recently visited Central Africa, gave the followingimpressions of visit at a joint meeting of the Royal AfricanSociety and the Royal Empire Society, on November 7, 1957. Mr.James Callaghan, M.P., a Labour Party member of the delegationpresided.     

THE PHILADELPHIA FOOT PATROL EXPERIMENT: A RANDOMIZED CONTROLLED TRIAL OF POLICE PATROL EFFECTIVENESS IN VIOLENT CRIME HOTSPOTS*

Originating with the Newark, NJ, foot patrol experiment, research has found police foot patrols improve community perception of the police and reduce fear of crime, but they are generally unable to reduce the incidence of crime. Previous tests of foot patrol have, however, suffered from statistical and measurement issues and have not fully explored the potential dynamics of deterrence within microspatial settings. In this article, we report on the efforts of more than 200 foot patrol officers during the summer of 2009 in Philadelphia. Geographic information systems (GIS) analysis was the basis for a randomized controlled trial of police effectiveness across 60 violent crime hotspots. The results identified a significant reduction in the level of treatment area violent crime after 12 weeks. A linear regression model with separate slopes fitted for treatment and control groups clarified the relationship even more. Even after accounting for natural regression to the mean, target areas in the top 40 percent on pretreatment violent crime counts had significantly less violent crime during the operational period. Target areas outperformed the control sites by 23 percent, resulting in a total net effect (once displacement was considered) of 53 violent crimes prevented. The results suggest that targeted foot patrols in violent crime hotspots can significantly reduce violent crime levels as long as a threshold level of violence exists initially. The findings contribute to a growing body of evidence on the contribution of hotspots and place‐based policing to the reduction of crime, and especially violent crime, which is a significant public health threat in the United States. We suggest that intensive foot patrol efforts in violent hotspots may achieve deterrence at a microspatial level, primarily by increasing the certainty of disruption, apprehension, and arrest. The theoretical and practical implications for violence reduction are discussed.     

Measuring the Financial Position of Municipalities: Numbers Do Not Speak for Themselves

There are several challenges facing someone who wants to know if a city's revenue structure is fair and reasonable. There are few generally accepted standards to use as benchmarks of financial condition, and there is no generally accepted methodology to assess relative financial position. This article reviews literature on financial position and condition, and then develops a methodological approach that creates a cohort of similar cities for benchmarking financial position, and then forming a basis for assessing financial condition. Based on a study of the financial position of a medium-sized city, the article offers lessons for practitioners and scholars.