Failing to tell friend from foe: A comment on Wijn et al. (2017)

Behavioural observation programmes are becoming increasingly popular at transportation hubs, sporting events, and other large crowd gatherings. Premise of these programmes is that malicious intention can be accurately deduced from observable behaviour. In a recent article published in this journal, Wijn et al. (2017, Legal and Criminological Psychology, 22, 378–399.) conclude that environmental cues improve the correct detection of participants with malicious intent. This conclusion can and will be interpreted as support for behavioural observation programmes. In this comment, we argue that Wijn and colleagues draw a fundamentally wrong conclusion from their data. What their data show is that malicious intentions could not be detected in any of the conditions. Their findings can therefore not be conceptualized as evidence for behavioural observation programmes. Rather, they add to the growing critique voiced towards such programmes.     

A fast ultrasound-assisted extraction procedure for trace elements determination in hair samples by ICP-MS for forensic analysis

An ultrasound-assisted extraction method is proposed for the determination of trace elements in hair samples by inductively coupled plasma-mass spectrometry (ICP-MS) for forensic investigation. Prior to analysis, 25 mg of hair samples were accurately weighed into (15 mL) conical tubes. Then, 2 mL of 20% HNO₃ is added to the samples, sonicated at 2 min (50 W, 100% amplitude), and then further diluted to 10 mL with Milli-Q water. Resulted diluted slurries are centrifuged and the analytes are directly determined in the supernatant. Calibrations against aqueous solutions were carried out with rhodium as internal standard. The method was successfully applied for the extraction of Al, As, Ba, Be, Cd, Co, Cr, Cu, Mn, Pb, Tl, U, V and Zn with a method detection limit (3 s, n = 20) of 0.1, 0.4, 0.2, 0.09, 0.08, 0.04, 0.1, 2.9, 1.0, 0.9, 0.04, 0.05, 0.1 and 4.2 ng/g, respectively. Method accuracy is traceable to Certified Reference Materials (CRMs) 85 and 86 human hair from the International Atomic Energy Agency (IAEA). Additional validation data are provided based on the analysis of hair samples from the trace elements intercomparison program operated by the Institut National de Sante’ Publique du Quebec, Canada. The proposed method is very simple and can be applied for forensic purposes with the elimination of sample digestion step prior to analysis. Then, a considerable improvement in the sample throughput is archived with the use of the proposed method.     

Analysis of 11 tetrameric STRs in wild boars for forensic purposes

STR profiling of animal species has a wide range of applications, including forensic identification, wildlife preservation, veterinary public health protection and food safety. We tested the efficacy of a multiplex PCR-based assay including 11 porcine-specific tetrameric STRs in a population sample of wild boars (n = 142) originating from Piedmont (North West Italy). Multiple deviations from Hardy–Weinberg expectations were observed, mostly due to a reduction in observed heterozygosity indicative of a high degree of inbreeding. A value of θ of 0.046 and an inbreeding coefficient of 0.089 were estimated. Combined power of discrimination and probability of exclusion values for the STR panel were 0.9999999999996 and 0.99989. In order to test the suitability of the method for meat traceability purposes, a domestic pig reference sample (n = 412), consisting of commercial lines commonly used in the meat production process, was also typed. A Bayesian cluster analysis carried out using the observed genotypes, showed a percentage of correct subspecies assignment of individual samples of 0.974 for wild boars and 0.991 for pigs, thus demonstrating the usefulness of the multiplex STR-typing system for discrimination purposes.     

The life satisfaction approach to valuing public goods: The case of terrorism

Terrorism has large social costs that are difficult to quantify for the well-known problems of eliciting people’s preferences for public goods. We use the LSA to assess these costs in utility and monetary terms. Based on combined cross-section time-series data, we estimate the costs of terrorism for France and the British Isles. We find large negative effects of terrorism on life satisfaction that translate into considerable compensating surpluses for a hypothetical reduction in terrorism, in particular for the serious conflict in Northern Ireland. The effects of terrorism are robust and differ across groups in accordance with prior expectations.     

Fimag: The United Kingdom Disaster Victim/Forensic Identification Imaging System

Abstract:  Imaging is an integral diagnostic tool in mass fatality investigations undertaken traditionally by plain X-rays, fluoroscopy, and dental radiography. However, little attention has been given to appropriate image reporting, secure data transfer and storage particularly in relation to the need to meet stringent judicial requirements. Notwithstanding these limitations, it is the risk associated with the safe handling and investigation of contaminated fatalities which is providing new challenges for mass fatality radiological imaging. Mobile multi-slice computed tomography is an alternative to these traditional modalities as it provides a greater diagnostic yield and an opportunity to address the requirements of the criminal justice system. We present a new national disaster victim/forensic identification imaging system—Fimag—which is applicable for both contaminated and non-contaminated mass fatality imaging and addresses the issues of judicial reporting. We suggest this system opens a new era in radiological diagnostics for mass fatalities.     

On the optimal complexity of law and legal rules harmonization

This paper analyses the determination of the complexity of legal rules in a context of harmonization between different countries. We first assume that there are no harmonization gains. We show that if the optimal complexity levels of legal rules are equal across countries, their common level will stick when legal rules are harmonized. When these levels are different, one nation-state may lose to the determination of a uniform level of complexity. However, when there are harmonization gains we show that if these harmonization gains are large enough, complex legal rules are optimal. Moreover, we show that each nation-state could gain from the determination of a uniform level of complexity, even if this level is not its preferred one.

Welfare improving ignorance and negligence rule

The literature considers that the ignorance of activity levels by the courts is a major source of inefficiency to minimize the social costs of accidents. In this paper, we show that the inefficiency of the negligence rule based on a standard of care (and correlatively ignoring the activity level) is not established if certain dimensions of care are not verifiable. In other words, if care and activity levels are the only relevant variables of the injurer's set of actions to reduce the risk of accident, it is true that inefficiency arises when the court ignores one element of this set. But, considering that some dimensions of care are in practice not verifiable, it can be efficient for the judge not to take into account the activity level of the defendant. We propose a simple model with three variables: observable and unobservable precautionary measures and activity level.

Fake Claims of Fake News: Political Misinformation,Warnings, and the Tainted Truth Effect

Political Behavior - Fact-checking and warnings of misinformation are increasingly salient and prevalent components of modern news media and political communications. While many warnings about...     

Tax rates and tax evasion: an empirical analysis of the long-run aspects in Italy

We use official time series of the Italian evaded VAT base (Ministry of Finance) for the period 1980:1–2006:4 to investigate empirically the long-run characteristics of tax evasion and the relationship with the tax burden. Three hitherto unexplored issues are addressed. First, using different measures of aggregate economic activity as reference variables in estimating the average tax burden, we examine the size and dynamics of the overburden traceable back to tax evasion. Second, exploiting cointegration techniques, we quantify the elasticity between tax evasion and the average tax rate in Italy. We then comment on the complex dynamic interaction between the tax burden and tax evasion to ascertain whether in the Italian experience there is evidence for any “vicious circle” between them.     

The ‘us vs them’ mentality: a comparison of police cadets at different stages of their training

ABSTRACT

Any depiction of police culture includes a strong ‘us versus them’ element, but research has been unable to satisfactorily explain its development and evolution. In particular, very few studies have focused on the training period, between when an individual chooses a police career and his/her first day as an officer. A total of 1,979 pre-university students from seven colleges in Quebec (Canada) completed a self-administered survey where they had to answer general questions about the police followed by specific questions about four realistic videos of fictional police interventions involving use of force. Unsurprisingly, the analysis suggests that students in Police Technology tend to think they are more supportive of the police and the use of force than students in other programs. However, students in Police Technology increasingly indicate that the majority of people would report a more negative opinion than they have, suggesting that police candidates increasingly disidentify with the rest of the population.