Identifiability of two‐component skew normal mixtures with one known component

We give sufficient identifiability conditions for estimating mixing proportions in two‐component mixtures of skew normal distributions with one known component. We consider the univariate case and two multivariate extensions: a multivariate skew normal distribution (MSN) and the canonical fundamental skew normal distribution (CFUSN). The characteristic function of the CFUSN distribution is additionally derived.     

Is 60 the New 50? Examining Changes in Biological Age Over the Past Two Decades

Increasing life expectancy has been interpreted as improving health of a population. However, mortality is not always a reliable proxy for the pace of aging and could instead reflect achievement in keeping ailing people alive. Using data from NHANES III (1988–1994) and NHANES IV (2007–2010), we examined how biological age, relative to chronological age, changed in the United States between 1988 and 2010, while estimating the contribution of changes in modifiable health behaviors. Results suggest that biological age is lower for more recent periods; however, the degree of improvement varied across age and sex groups. Overall, older adults experienced the greatest improvement or decreases in biological age. Males, especially those in the youngest and oldest groups, experienced greater declines in biological age than females. These differences were partially explained by age- and sex-specific changes in behaviors, such as smoking, obesity, and medication use. Slowing the pace of aging, along with increasing life expectancy, has important social and economic implications; thus, identifying modifiable risk factors that contribute to cohort differences in health and aging is essential.     

From Political to Material Inequality: Race,Immigration, and Requests for Public Goods

Studies of political participation typically analyze voting, contentious collective action, or membership in voluntary associations. Few scholars investigate a more mundane—but highly consequential—form of neighborhood politics: requests for basic city services. We conceptualize city service requests as a direct, instrumental contact with local government that alters the geographical distribution of public goods. We hypothesize that rates of service requests vary with the ethnic and immigrant composition of neighborhoods, due to differences in these communities’ expectations of local government. We test this hypothesis using administrative data from the City of Boston. We find neighborhoods with high concentrations of first‐generation immigrants less likely to request services, relative to need. The concentration of African Americans, however, is associated with large increases in neighborhood service requests. We conclude with implications for the study of race, inequality, and political incorporation.     

The Home and the ‘Hood: Associations Between Housing and Neighborhood Contexts and Adolescent Functioning

Adolescents from low‐income families face various opportunities and constraints as they develop, with possible ramifications for their well‐being. Two contexts of particular importance are the home and the neighborhood. Using adolescent data from the first two waves of the Three‐City Study (N = 1,169), this study explored associations among housing problems and neighborhood disorder with adolescents' socioemotional problems, and how these associations varied by parental monitoring and gender. Results of hierarchical linear models suggest that poor‐quality housing was most predictive of the functioning of girls and of adolescents with restrictive curfews, whereas neighborhood disorder was a stronger predictor for boys. Implications for future research on associations between housing and neighborhood contexts and adolescent development are discussed.     

An Insider View: Knowledge and Opinions of Welfare From African American Girls in Poverty

This article presents African American adolescent girls' views of welfare and welfare reform at the cusp of welfare legislation in 1996. Interview data from a random sample of poor and low-income families indicate that adolescents have a limited knowledge of basic welfare rules. Low-income girls see welfare as an important safety net, yet they also have negative views of welfare recipients and the effects of welfare on recipients. The vast majority express agreement with work requirements, and about half believe that a discontinuation of welfare would change adolescent sexual and childbearingbehaviors. These results raise the possibility that adolescents are responding to the rhetoric and "signals" of welfare reform; alternatively, they may simply be expressing typical adolescent egocentrism and optimism.     

Evaluation of Alcohol Screening,Brief Intervention,and Referral to Treatment (SBIRT) Training for Social Workers

Social work education is well positioned for workforce development initiatives that prepare practitioners to use Screening, Brief Intervention, and Referral to Treatment (SBIRT) with people at risk for alcohol use disorders. This article presents preliminary process and outcome evaluation data from the first year of a three-year grant which suggests that the training is acceptable and results in significant changes in trainees’ knowledge, attitudes, and self-perceived SBIRT skills. Training was embedded within the curricula of an urban school of social work, which includes a Bachelor of Social Work (BSW) program and a single-concentration clinical Master of Social Work (MSW). Trainees included social work students (n = 134) and field instructors (n = 38). More than 90% of students were very satisfied or satisfied with the training, and 100% of field instructors rated the training as excellent or good. Students demonstrated significant changes from pre- to posttraining in substance use knowledge, confidence in SBIRT skills, and attitudes about integrating SBIRT into practice. Field instructors reported increased confidence in screening. Integrating SBIRT training into social work curriculum is a promising method of developing a workforce that can effectively prevent and alleviate alcohol misuse.     

Anxiety disorders and older women

Anxiety is a problem for millions of Americans. It poses special challenges for women as they grow into advanced age. This paper provides a general overview of anxiety disorders, including panic disorder, agoraphobia, specific phobia, social phobia, obsessive compulsive disorder, and generalized anxiety disorder. Etiology, assessment and treatment strategies are then addressed. Special focus is directed at biological and psychosocial issues as they relate to older women in the development, experience, treatment and prevention of anxiety disorders.     

Beyond Cans and Capacity

Many essential public services are provided through networks of community‐based nonprofit organizations. Previous research has demonstrated that simply providing additional resources to these organizations is insufficient to better address demands for public services. We also know little about how and why these organizations adopt network‐level objectives related to service provision. In this analysis, we expand the focus of service provision beyond capacity to incorporate the unique roles that define the very existence of nonprofit organizations, and how these roles affect organizational behavior with respect to service network objectives. We use focus group, survey, and administrative data from one hundred community‐based nonprofit organizations in an emergency food service network to explore the relationships among capacity, roles, and specific program objectives.     

The plight of international child support enforcement

Arising from the landscape of global development and fueled by the demographics of increasing rates of mobility and divorce, the international enforcement of child support is a challenging and growing problem. Current initiatives to rectify this critical problem cut across geopolitical divides and have resulted in the creation of uniform procedures for child support enforcement that are awaiting ratification in the USA: the 2007 Hague Convention on the International Recovery of Child Support and Other Forms of Family Maintenance. In the following paper, we will trace the evolution of these efforts and extrapolate a framework for social work practice illustrated by examples drawn from a case study of a family's plight with international child support enforcement. While thousands of families are impacted by this issue, there is a gap in the social work literature about this critical issue.