Particle Analysis for the Detection of Gunshot Residue (GSR) in Nasal Samples Using Scanning Laser Ablation and Inductively Coupled Plasma-Mass Spectrometry (SLA-ICPMS)

Currently, aluminum stub with carbon adhesive devices are used to collect inorganic gunshot residues (GSR) from the hands of a shooter. In an ideal shooting case, the gunshot particles do not persist for more than 2 h in the hands of the shooter, provided that the hands have not been washed. However, for forensic analysis and inference, the extended persistence of GSR would be desirable. This study investigates a novel GSR sampling and detection protocol. Sampling was performed in the nostrils using swab devices impregnated in ethylenediaminetetraacetic acid (EDTA). The GSRs persisted for longer periods in nasal mucus than on the hands, and particles were detected 6 h after shooting occurred. The analytical determination was conducted by scanning laser ablation-inductively coupled plasma-mass spectrometry (SLA-ICPMS) which enable the identification of the number of particles and their elemental composition. Seventeen isotope signals corresponding to ¹³C, ²⁰⁵Tl and 15 analytes that are usually associated with the composition of GSR residues were monitored: ²⁷Al, ²⁹Si, ³¹P, ³³S, ³⁵Cl, ³⁹K, ⁴⁴Ca, ⁵⁷Fe, ⁶⁰Ni, ⁶³Cu, ⁶⁶Zn, ¹¹⁸Sn, ¹²¹Sb, ¹³⁷Ba, and ²⁰⁸Pb. The SLA technique enabled the reduction of the swab analysis time to 40 min. The effectiveness of this methodology was evaluated with two types of firearms: a pistol and a shotgun. The results indicated that the methodology proposed for the analysis of the nasal GSR was effective and that it can improve or complement the forensic analyses and inferences presented in a court.     

One or two arenas? The break-up between national and regional elections

ABSTRACT

This paper shows that the role of national electoral dynamics on regional elections is highly mediated by institutional and electoral constraints at the regional level. Using data on statewide parties’ electoral competition in regional and national elections in Spain and Italy, results show that the contamination of regional elections is lower in regions where decentralization has travelled further and where strong regionalist parties dominate electoral competition. The paper also shows that these two channels -more regional authority and more regionalist competition- shape the regional manifestos of statewide parties by increasing their pro-regional positions. These findings represent a contribution to a better understanding of the extent to which regional elections are a separate electoral arena from the national one.     

Multiple principals,multiple problems: Implications for effective governance and a research agenda for joint service delivery

The multiple principal problem refers to multiple collective action problems that organizations face when they must balance (competing) interests of multiple stakeholders under joint service delivery. It negatively affects different types of organization, yet we know little about how organizations (can) mitigate it. We expand a framework based on principal–agent theory, review the literature, and consider implications for effective governance of joint service delivery in the public sector. We observe that joint service delivery can lead to free‐riding and duplication in monitoring, lobbying by principals, and increased autonomy for agents, leading to inefficiency. We build a research agenda and tentatively suggest, based on the literature, that an interface approach, where an elected unitary actor is placed in a middle tier between politics and service delivery, might best mitigate the multiple principal problem, which is currently not dealt with effectively in public management.     

Incognizance and Perceptual Deviation: Individual and Institutional Sources of Variation in Citizens’ Perceptions of Party Placements on the Left–Right Scale

In this paper we use comparative study of electoral systems data to understand the variation in citizens’ perceptions of political party placements on the left–right scale. We estimate multilevel models to assess the extent to which individual characteristics, party characteristics, and institutional designs contribute to variability observed in citizens’ perceptions of party placements. Because lack of information on the part of the citizens may be revealed through failure to respond to the left–right scale questions or through random components to actual placements, we develop models that include assessments of both types of responses to reduce bias from considering only one source. We find that individual-, party-, and institutional-level variables are relevant to understanding variation in citizens’ perceptions of party placements. Finally, we demonstrate that an inability to cognize the left–right scale (incognizance) and a deviation in the perceptions of party positions (perceptual deviation) have important consequences for citizens’ thermometer evaluations of political parties.     

Race and Assisted Housing

This article explores racial disparities between assisted housing outcomes of black and white and white households with children. We compare the assisted housing occupied by black and white households with children, and examine whether young adult education, employment, and earnings outcomes in 2011 differ between blacks and whites who spent part of their childhood in assisted housing in the 2000s. We use a special version of the Panel Study of Income Dynamics (PSID) that has been address-matched to federally assisted housing, and the PSID’s Transition to Adulthood supplement, along with geocode-matched data from the U.S. Census Bureau, American Community Survey (ACS), CoreLogic real estate data, and U.S. Department of Housing and Urban Development (HUD). Statistical methods include difference in means, logit and general linear models. We find no evidence of racial disparities in the type of assisted housing program, the physical quality of project-based developments, or the management of public housing developments in the 2000 decade. But black households with children are more likely to live in assisted housing that is located in poorer quality neighborhoods. Multivariate tests reveal that the worse outcomes of black young adults compared with whites disappear once socioeconomic differences are taken into account. The discrepancy in assisted housing neighborhood quality experienced by black and white children makes no additional contribution to predicting young adult outcomes. Nonetheless, black children living in relatively better assisted housing neighborhoods tend to have better outcomes in young adulthood than those who live in poorer quality assisted housing neighborhoods. We discuss sources of racial disparity in neighborhood quality, and the policies enacted and proposed to address it.     

The efficiency and effectiveness of municipally owned corporations: a systematic review

Municipally owned corporations (MOCs) are increasingly utilised to provide local public services, but little remains known about their efficiency and effectiveness. In this article, we offer a typology of MOCs, explore the variables that affect their behaviour, and perform a systematic review of public administration articles published between 2001 and 2015 on their efficiency and effectiveness. We find that MOCs are often more efficient than local bureaucracies in the provision of services such as refuse collection, water distribution, and transit services, although they also have high initial failure rates. We conclude that municipally owned corporations are a viable means for delivering some local public services for localities capable of initiating and managing complex contracts. In light of the scarcity of literature on this topic, our conclusions remain tentative, and we encourage additional research into this growing phenomenon.     

Two spheres of regulation: Balancing social and economic goals

Independent regulatory authorities hold comprehensive policy mandates that cover both economic and social goals. They take on various roles in market regulation, competition policy, consumer protection, and labor inspection. This article questions whether policymakers are driven by different rationales when delegating the realization of social, as opposed to economic goals, and analyzes how regulators accommodate their various roles in practice. The conceptual framework links the literature on delegation and organizational models. Comparative analysis of postal policy in France, Germany, and the United Kingdom covers a serious area of potential conflict between social and economic regulation. Variation in delegation points to the relevance of instrumental considerations, but also to the politics of institutional arrangements. Variation in regulatory practice shows that organizational models make a difference in accommodating conflict. The article makes a strong case that social and economic regulation need to be addressed as two distinct, yet interacting spheres. © 2017 John Wiley & Sons Australia, Ltd     

Friends in Activities,School-related Affect,and Academic Outcomes in Diverse Middle Schools

Participating in school-based activities is linked to positive academic engagement and achievement, but less is known about how peer relationships within activities affect these outcomes. The current study examined friends in extracurricular activities as a predictor of academic outcomes in multiethnic middle schools in California. Specifically, the mediating role of school belonging, and interactions by ethnicity and type of activity, were examined in a sample including African American or Black, East or Southeast Asian, White, and Latino youth in extracurricular activities (N?=?2268; M_age?=?13.36 in eighth grade; 54% female). The results of multilevel mediational models suggested that school belonging mediated the link between friends in activities and academic outcomes, and these findings replicated across groups based on ethnicity and the type of activity in which one was involved in general. These results are discussed in terms of how activities can be structured to promote positive peer relations in ways that are linked with academic engagement and achievement.     

The Backbone Structure of Audience Networks: A New Approach to Comparing Online News Consumption Across Countries

Measures of audience overlap between news sources give us information on the diversity of people’s media diets and the similarity of news outlets in terms of the audiences they share. This provides a way of addressing key questions like whether audiences are increasingly fragmented. In this article, we use audience overlap estimates to build networks that we then analyze to extract the backbone—that is, the overlapping ties that are statistically significant. We argue that the analysis of this backbone structure offers metrics that can be used to compare news consumption patterns across countries, between groups, and over time. Our analytical approach offers a new way of understanding audience structures that can enable more comparative research and, thus, more empirically grounded theoretical understandings of audience behavior in an increasingly digital media environment.