On the efficiency of law: A public choice perspective

The authors thank Robert Higgs, Charles Rowley, and Gordon Tullock for helpful comments on an earlier draft. They also thank participants at the Law and Economics Session of the Public Choice Society's 1989 annual meetings for constructive suggestions.     

Long-term effects of parental divorce on young adult male crime

The purpose of this study was to explore the long-term effects of parental divorce on young adult male crime from a longitudinal perspective. Four hundred and twenty-three males were randomly selected from a Danish birth cohort. Results of analyses of variance showed an initial significant relationship between divorce and young adult crime. However, the effects of divorce disappeared when further path analysis controlled for the effects of social class and father's criminality. In addition, time of divorce did not have an effect on later criminal behavior.Received her Ph.D. from Teachers College, Columbia University, in 1975. Current interests are interactions between biological and social variables.Received her Ph.D. from the University of Southern California in 1986. Current interests are social intervention and delivery of human services.Received his Ph.D. from Cornell University in 1974. Current interests are measurement, causal modeling, and individual differences.Received his Ph.D. from the University of Nebraska (Lincoln) in 1955. Current interests are learning, instructional development, and the development of human potential.     

A mixed methods study of the mental health and criminal justice histories of missing persons

Approximately 35,000 people are reported missing each year in Australia; rates elsewhere are even higher, with a recent UK study suggesting that a person goes missing every 2 min. Missing persons place a significant burden on police services; it is interesting, therefore, that very little research attention has been paid to this topic. This mixed methods study aimed to address this significant gap by analysing the mental health and criminal justice histories of a sample of missing persons and comparing them to rates in the general community. The study found that both mental health and criminal justice histories were significantly overrepresented among missing persons compared to those in the general community, and that young people reported missing commonly displayed suicidal behaviour. Results highlight at risk groups and suggest that criminality is much more commonly implicated in missing person incidents than previously thought.     

‘So what about the stories?’ An exploratory study of the definition,use, and function of Narrative Child Sexual Exploitation Material

The legal and psychological research surrounding online Child Sexual Exploitation Material (CSEM) is focused on visual depictions of children, either as still images or movies. Narrative CSEM (N-CSEM) describes an under-researched area, resulting from difficulties surrounding its conceptualisation, both legally as well as concerning the function for its users. The current study describes an initial attempt in defining N-CSEM in comparison to visual material, based on interviews with users of CSEM and N-CSEM and professionals working with this user group. Thematic Analysis resulted in three super-ordinate themes. All themes were analysed and enriched from the perspectives of user- and service-representatives. The study provides insight into N-CSEM as a separate entity from visual CSEM, challenging and informing legal decision-making and assessment and treatment providers for users of CSEM.     

Testing the “Law of Crime Concentration at Place” in a Suburban Setting: Implications for Research and Practice

Objective

To assess whether the “law of crime concentration at place” applies in a non-urban context. We test whether longitudinal trends in crime concentration, stability, and variability apply in a suburban setting.

Methods

We use group-based trajectory analysis to examine trends in recorded crime incidents on street segments in Brooklyn Park, a suburban city outside Minneapolis, Minnesota, over a 15-year period from 2000 to 2014.

Results

Consistent with the law of crime concentration at place, crime in Brooklyn Park is highly concentrated at a small percentage of micro-places. Two percent of street segments produced 50 % of the crime over the study period and 0.4 % of segments produced 25 % of the crime. The patterns of concentration are highly stable over time. However, the concentration of crime is substantially higher and there is much less street-by-street variability in Brooklyn Park compared to urban areas.

Conclusions

We find strong support for the application of the law of crime concentration at place to a non-urban setting, suggesting that place-based policing approaches tested in cities can also be applied to suburbs. However, there are also important differences in the concentration and variability of crime hot spots in suburbs that require further examination. Our study is based on a single setting that may not be representative of other suburban and rural areas. Finally, the clustering of hot spots raises questions about the use of street segments to analyze crime at suburban micro-places.

     

Y-chromosome STR haplotypes in males from Greenland

A total of 272 males from Greenland were typed for 11 Y-chromosome STRs DYS19, DYS385a/b, DYS389-I, DYS389-II, DYS390, DYS391, DYS392, DYS393, DYS437, DYS438 and DYS439 with the PowerPlex^® Y System (Promega). A total of 146 different haplotypes were observed and the haplotype diversity was 0.9887. The number of haplotypes seen once was 108 and the most common haplotype was observed in 12 males. A significant F_ST value was observed (F_ST = 0.012, P < 0.00001) when comparing the population of 15 locations in Greenland assigned to 7 groups. The significance could mainly be attributed to the subpopulation of males from Tasiilaq (East of Greenland). The R_ST value was not statistically significant (R_ST = 0.016, P = 0.15).     

The successful DNA typing of samples following a thermal cycler power loss

An approach for generating DNA profiles when critical samples have been consumed and a power outage occurs during the polymerase chain reaction (PCR) amplification reaction is described. This study demonstrates that a complete and accurate DNA short tandem repeat profile can be obtained: (1) when single source DNA samples are amplified for 26, 27, or 28 cycles using the Profiler Plus and COfiler Amplification Kits after an interruption in amplification, (2) from mock samples when PCR amplification has been interrupted early (after five cycles) or late (after 18 cycles) and the sample is subjected to an additional round of amplification, even after incubation of the sample at room temperature overnight, and (3) from nonprobative casework samples interrupted after approximately 18 cycles of amplification, an overnight incubation at room temperature and subjected to one or two additional rounds of PCR amplification for approximately 26 total cycles. Samples interrupted before five completed cycles and subjected to additional PCR cycles yielded variable results.     

Low-intensity community supervision for low-risk offenders: a randomized,controlled trial

The Philadelphia Low-Intensity Community Supervision Experiment provides evidence on the effects of lowering the intensity of community supervision with low-risk offenders in an urban, US county community corrections agency. Using a random forests forecasting model for serious crime based on Berk et al. Journal of the Royal Statistical Society, Series A, 172(Part 1), 191–211, 2009, 1,559 low-risk offenders were identified and randomly assigned to either standard or reduced frequency of mandatory office visits. Treatment as assigned was substantially delivered at 4.5 probation visits per year versus 2.4, for as long as offenders remained on active probation or parole. In a one-year follow-up for all cases, outcomes examined were the prevalence, frequency, seriousness and time-to-failure of arrests for new crimes committed after random assignment was implemented. No significant differences (p = .05) in outcomes were found between standard and low-intensity groups. Non-significant differences for offense seriousness favored the low-intensity group. We conclude that lower-intensity supervision at the tested level of dosage can allow fewer officers to supervise low-risk offenders in the community without evidence of increased volume or seriousness of crime.     

Dismantling,disintegration or continuing stealthy integration in European Union environmental policy?

This symposium assesses the trajectory of European Union (EU) environmental policy and integration in light of the rising pressure for policy dismantling and disintegration. This introductory article discusses the literature and the mixed evidence of EU environmental policy dismantling. Building on the three symposium articles, we investigate the role of the European Commission in this process, evaluating its role as a general ‘motor of integration’ and more specifically as an environmental policy entrepreneur. We find that the current political context does push the Commission to reconsider its entrepreneurial role and adopt the role of a ‘normalized bureaucracy’. Nonetheless, organizational features, such as new hierarchies and presidential leadership, and ideas that frame policy initiatives explain continued policy evolution and resistance to outright dismantling. Scholars should also pay close attention to implementing measures and patterns of enforcement to detect the more subtle policy shifts.