Measures of tail asymmetry for bivariate copulas

Three tail asymmetry measures for bivariate copulas are introduced using two different approaches—univariate skewness of a projection and distance between a copula and its survival/reflected copula. We compare the asymmetry measures based on certain desirable properties. Bounds for each measure are obtained and also copulas which attain these extreme values are identified. Two data examples show the amount of asymmetry that might be expected in practice.     

Developing a social work curriculum on political conflict: findings from an IASSW-funded project

This paper presents the findings from an innovative project funded by the International Association of Schools of Social Work (IASSW) and undertaken by an international team of academics investigating the development of a global curriculum for social work in the context of political conflict. Coupled alongside the emerging research and literature on the subject, our small-scale survey findings indicate support for the need for social work educators to address political conflict more systematically within social work curricula at both undergraduate and post-qualifying levels of social work education. This paper illuminates the opportunities for creative pedagogy whilst also examining the threats and challenges permeating the realisation of such initiatives. In this way, the implementation of a proposed curriculum for political conflict is given meaning within the context of IASSW's Global Standards for social work education. Given the exploratory nature of this project, the authors do conclude that further research is warranted in regard to potential curriculum development and suggest using a comparative case study approach with more in-depth qualitative methods as a way to address this.     

Food Self-Provisioning in Czechia: Beyond Coping Strategy of the Poor: A Response to Alber and Kohler’s ‘Informal Food Production in the Enlarged European Union’ (2008)

Food systems are of increasing interest in both research and policy communities. Surveys of post-socialist countries of Central and Eastern Europe (CEE) show high rates of food self-provisioning. These practices have been explained in terms of being ‘coping strategies of the poor’. Alber and Kohler’s ‘Informal Food Production in the Enlarged European Union’ (2008) offers a prominent account of this argument, supported by quantitative data. However, evidence from our case study of food self-provisioning in one CEE state–Czechia–contradicts their findings. Newly commissioned survey data, as well as a fresh look at the data they were working from, demonstrate that rather than being motivated by poverty, these widespread practices serve as a hobby and as a way of accessing ‘healthy food’. With food self-provisioning becoming an increasingly prominent subject in advanced industrial countries, in terms of both health and environmental policy, we propose that much greater care is taken in researching and interpreting the reasons for differences in food systems. Our findings are that environmentally sustainable and healthy self-provisioning in Czechia is motivated by a range of reasons, and practised by a significant proportion of the population across all social groups. This conclusion questions linear narratives of progress that figure ‘western’ practices as advanced or complete or automatically desirable, and contributes in a modest way to a decentring of narratives of progress.     

The information for the direction of dependence in l1 regression

Fitting a linear regression for a response variable by minimising the sum of absolute deviations, L₁ regression, may be viewed as a maximum likelihood procedure applied to the Laplace distribution. An interesting bivariate case is where the conditional distribution of the response X₂ given X₁ and the marginal distribution of the explanatory variable X₁ are both Laplace. In this context we show there is information to distinguish the direction of dependence between X₁ and X₂ from observations. That is we may distinguish the model in which X₁ is dependent on X₂ from that in which X₂ is dependent on X₁ This is not true for L₂ regression based on the Normal distribution.     

Seeing the wood for the trees: Social Science 3.0 and the role of visual thinking

Social Science is increasingly called on to address “grand challenges”, “wicked problems”, “societal dilemmas” and similar problematiques. Examples include climate change, the war on drugs and urban poverty. It is now widely agreed that the disciplinary structure of academic science, with its journals, curricula, peer communities, etc., is not well suited to such trans-disciplinary, ill-bounded, controversial issues, but the ways forward are not yet clear or accepted by the mainstream. The concept of a next generation paradigm of “Science 3.0” has emerged through work on sustainability systems analysis, and for this multiple channels for learning, thinking and communications are essential. Visual thinking in its many forms (from technical representation or mapping, to photography or video, to design or illustration, to fine art) can bring to the table tacit and “felt” knowledge, creative experience and links from analysis with synthesis. This paper first sketches the contours of a Social Science 3.0, and then demonstrates with examples how visual thinking can combine with rational argument, or extend beyond it to other forms of experience.     

Organized Religious Involvement and Mental Health Among Caribbean Black Adolescents

Though religion has been related to better mental health, the aspects of organized religious life most salient for the mental health of Caribbean Black adolescents in the US, beyond religious service attendance, has been understudied. This research utilized a sub-sample of Caribbean Black adolescents from the NSAL-A, a nationally representative U.S. dataset, to examine (1) the prevalence of organized religious involvement (e.g., participation in religious service activities, choice to attend religious services) and (2) the relationship between organized religious involvement and mental health. Results showed that 62 % of Caribbean Black adolescents attend religious services regularly (at least a few times a month) and 49 % or more attend religious services or participate in religious activities (e.g., youth groups) by choice. Additionally, various aspects of organized religious involvement were positively related to coping and self-esteem, and negatively related to depressive symptoms. Religious service attendance was not related to any of the mental health indicators. Study results can inform the development of individual and group level interventions targeted at supporting the mental health of Caribbean Black adolescents.     

Structured risk assessment procedures: instruments of abuse?

Child protection services in Australia and elsewhere face increasing internal and external demands. As a response to these pressures, in part at least, services are increasingly implementing some form of risk assessment procedures. This article examines the practice implications of the increasing use of risk assessment instruments in child protection services. It highlights the complexity of the concept of risk as the basis for a future‐oriented assessment activity. The authors suggest that this change of time frame (from what has happened to what might happen) may be detrimental to children. Through a critical review of the literature, the authors question whether risk prediction is possible and discuss the limitations of risk assessment instruments which omit some risk factors and may ignore the perspective of the child. The authors challenge the validity of risk assessment instruments in statutory settings and suggest that the protection of the organization may be a major objective in their implementation. Copyright © 1999 John Wiley & Sons, Ltd.