Building adaptive estimating equations when inverse of covariance estimation is difficult

Summary. To construct an optimal estimating function by weighting a set of score functions, we must either know or estimate consistently the covariance matrix for the individual scores. In problems with high dimensional correlated data the estimated covariance matrix could be unreliable. The smallest eigenvalues of the covariance matrix will be the most important for weighting the estimating equations, but in high dimensions these will be poorly determined. Generalized estimating equations introduced the idea of a working correlation to minimize such problems. However, it can be difficult to specify the working correlation model correctly. We develop an adaptive estimating equation method which requires no working correlation assumptions. This methodology relies on finding a reliable approximation to the inverse of the variance matrix in the quasi-likelihood equations. We apply a multivariate generalization of the conjugate gradient method to find estimating equations that preserve the information well at fixed low dimensions. This approach is particularly useful when the estimator of the covariance matrix is singular or close to singular, or impossible to invert owing to its large size.     

Decoding the Miss Daisy Syndrome: An Examination of Subjective Responses to Mobility Change

The subjective responses associated with personal life space and mobility status were explored. Thirty individuals participated in focus groups based on self-rated disability status, current places visited, and availability. Qualitative analyses revealed that most participants equated personal mobility with driving a vehicle. Attitudes concerning mobility status and preparedness for change varied based on disability level and personal experience. Fear of dependence from future mobility loss was prominent in all groups. Few participants acknowledged significant planning for future retirement from driving or other mobility challenges. An understanding of common attitudes, perceptions and meanings can inform professionals who intervene and support older adults experiencing mobility changes.     

Virtue Ethics for Social Work: A New Pedagogy for Practical Reasoning

Virtue ethics has begun to regain popularity among philosophers, and recent commentators have expressed enthusiasm vis-à-vis its appropriateness and strengths in the task of practising ethically in social work. Notwithstanding this growing interest in adopting virtue ethics frameworks, some difficulties arise when the question of how to develop social work virtues is posed. By examining the concept of reflective practice, and building from the work of Alasdair MacIntyre, this article explores how practical reasoning as a collective activity can help social work students in their moral development by developing and nurturing appropriate virtues for social work. A combination of Socratic dialogue activities, lectures and seminar work is highlighted as a potential pedagogical approach to teaching ethics and values on an undergraduate social work module at Coventry University. The approach is then appraised in the light of a set of module evaluation questionnaires distributed to students who undertook the module during the academic year 2006–2007.     

Social Learning Theory and Behavioral Therapy: Considering Human Behaviors within the Social and Cultural Context of Individuals and Families

This article examines theoretical thoughts of social learning theory and behavioral therapy and their influences on human behavior within a social and cultural context. The article utilizes two case illustrations with applications for consumers. It points out the abundance of research studies concerning the effectiveness of social learning theory and the paucity of research studies regarding effectiveness and evidence-based practices with diverse groups. Providing a social and cultural context in working with diverse groups with reference to social learning theory adds to the literature for more cultural considerations in adapting the theory to women, African Americans, and diverse groups.     

Prevention programmes for youth gambling: a review of the empirical evidence

This paper critically reviews the existing literature on the effectiveness of gambling prevention programmes for youth. Two categories of preventive strategies, all universal and most school-based, are presented: gambling-specific prevention programmes and gambling and related skills workshops. The age of the participants across the different studies varied from 9 to 20 years. Results show that programmes in both categories are generally effective in reducing misconceptions and increasing knowledge about gambling. However, a lack of long-term follow-ups and of behavioural measures makes it difficult to draw any clear conclusions about the effectiveness of such programmes. Recommendations are presented to improve the development and evaluation of future prevention programmes for youth gambling.     

The structural roots of food insecurity: How racism is a fundamental cause of food insecurity

Rates of food insecurity skyrocketed during the COVID-19 pandemic, doubling overall and tripling among households with children. Even before the pandemic, the rate of food insecurity in the United States was “unusually high” compared to other rich democracies, and rates have not improved substantially over the last 25 years. What explains the lack of progress in addressing food insecurity? This article maps out an overview of the experiences, causes, and consequences of food insecurity in the United States. We demonstrate that racism is a fundamental cause of food insecurity, both because racism contributes to racial disparities in income and wealth, and because racism is linked to food insecurity independent of poverty and socioeconomic status. For example, people of color are more likely to experience racial discrimination, which is associated with food insecurity, and to live in states where stricter regulations and harsher punishments are tied to social assistance programs, including food assistance programs. Because racism is a fundamental cause of food insecurity, eliminating it requires going beyond “just” eliminating poverty. Instead, the fundamental cause must be tackled directly: racism itself, which is built into the structure of American society and entrenched in its institutions.     

Residential Mobility Across Local Areas in the United States and the Geographic Distribution of the Healthy Population

Determining whether population dynamics provide competing explanations to place effects for observed geographic patterns of population health is critical for understanding health inequality. We focus on the working-age population—the period of adulthood when health disparities are greatest—and analyze detailed data on residential mobility collected for the first time in the 2000 U.S. census. Residential mobility over a five-year period is frequent and selective, with some variation by race and gender. Even so, we found little evidence that mobility biases cross-sectional snapshots of local population health. Areas undergoing large or rapid population growth or decline may be exceptions. Overall, place of residence is an important health indicator; yet, the frequency of residential mobility raises questions of interpretation from etiological or policy perspectives, complicating simple understandings that residential exposures alone explain the association between place and health. Psychosocial stressors related to contingencies of social identity associated with being black, urban, or poor in the United States may also have adverse health impacts that track with structural location even with movement across residential areas.     

Religiosität und politische Orientierung – Radikalisierung,Traditionalisierung oder Entkopplung?

In Germany as in other European countries the share of religious and churched persons is shrinking. The process of secularization is progressing gradually but inexorably and affects both Christian churches alike. In this contribution we examine if and how the numerical shrinkage of religious core segments affects the relation between religiosity and political attitudes. From secularization theory one can derive three partly opposing expectations. The radicalization thesis—particularly popular in the USA—assumes religious groups feel threatened by an increasingly secular society and this ties them together, radicalizes and mobilizes them. A second expectation rests on the assumption that in particular younger, economically well-off and highly educated people leave the churches. Through this process the social composition of the remaining church members changes leading not to radicalization but to traditionalization and withdrawal from politics. Finally, according to a third view it can be expected that the secularization process affects the entire society leading to a disintegration of tight religious milieus which in turn leads to a dissolution of social control and a decoupling of religiosity and political orientations. The central finding of our analyses is that—in support of our third hypothesis—religion loses its function for political attitudes and behaviors. In the German context the effect of religiosity on politics has been nearly exclusively studied with respect to voting behavior. By extending the focus to a wide range of other attitudes and behaviors and by taking a dynamic perspective this contribution thus closes an important research gap.