Confidence estimation via the parametric bootstrap in logistic joinpoint regression

We consider asymptotic properties of the maximum likelihood and related estimators in a clustered logistic joinpoint model with an unknown joinpoint. Sufficient conditions are given for the consistency of confidence bounds produced by the parametric bootstrap; one of the conditions required is that the true location of the joinpoint is not at one of the observation times. A simulation study is presented to illustrate the lack of consistency of the bootstrap confidence bounds when the joinpoint is an observation time. A removal algorithm is presented which corrects this problem, but at the price of an increased mean square error. Finally, the methods are applied to data on yearly cancer mortality in the US for individuals age 65 and over.     

Mobility,Stagnation, or Attrition? Diverse Earning Trajectories in a Cohort of Foreign‐born Men

Researchers and policymakers frequently debate about the integration of immigrants into the US economy. These debates are often based on limited data that do not capture the diversity of immigrants who arrived in the later twentieth century. Related research has also struggled to incorporate the experience of short‐term immigrants or immigrants who move in and out of the labor force. Using records from the Social Security Administration, we track the complete cohort of foreign‐born men who received social security numbers in 1978 through their subsequent working years and characterize their earning trajectories. We find that the share of foreign‐born men with low earnings declined over time, mainly due to attrition from the formal labor force. We also show, for the first time, that immigrants’ employment and earning histories vary considerably by their countries of origin: while those from several countries in Asia and Africa experienced substantial earnings growth and tended to stay in the United States for the long term, men from Central America and the Caribbean experienced more stagnation and had high levels of temporary and permanent attrition from the formal labor force. We end by discussing the historical contingencies and socioeconomic contexts—in sending countries and the United States—that shaped these trajectories.     

The Overlooked Side of the Experience: Personal Growth and Quality of Life Among Grandparents of Children Who Survived Cancer

This study adopted the theoretical framework of Schaefer and Moos (1992) to identify the resources that contributed to the personal growth and quality of life of 56 grandparents of childhood cancer survivors and compare them with 60 grandparents of healthy children. Participants filled out questionnaires addressing sense of coherence, social support, personal growth, and quality of life. A significant difference was found only with regards to personal growth. Hierarchical regressions revealed that health, economic status, higher levels of sense of coherence, and support contributed to quality of life, whereas being a grandparent of a child who survived cancer, lower sense of coherence, support, and past experience of the Holocaust contributed to personal growth. It seems that though they are both positive dimensions, quality of life and personal growth represent different entities in grandparents’ lives. This study sheds light on the experiences and perspectives of grandparents, indicating that alongside the physical and emotional toll taken by their grandchild’s illness, there are also positive implications that can lead to personal growth. Strengthening grandparents could enable families to take advantage of the potential contribution of one of the most committed support providers in the family.     

Poverty‐aware social work practice: service users' perspectives

In recent years, there has been an increase in scholarly writing on the theory and practice of critical social work with people living in poverty. Yet there is a lack of research on the experiences and perspectives of service users regarding this kind of practice. This paper presents a qualitative study that explored the practice of a special poverty‐aware social work programme in Israel, through the experiences of women who took part in it. Using an interpretative interactionist approach, in‐depth interviews with nine women were held three times over a 2‐year period. Findings reveal a high degree of satisfaction with the programme on the part of the women. The satisfaction was derived from four main experiences: the experience of visibility, the experience of the active partnership in the fight against poverty, the experience of close, hierarchy‐challenging relationships, and the experience of responsiveness to material and emotional needs. The findings are discussed in terms of three principles of practice: intervention in a real‐life context, relationship‐based intervention and the focus on both the material and emotional needs and their fulfilment.     

On Integrality, Stability and Composition of Dicycle Packings and Covers

Given a digraph D, the minimum integral dicycle cover problem (known also as the minimum feedback arc set problem) is to find a minimum set of arcs that intersects every dicycle; the maximum integral dicycle packing problem is to find a maximum set of pairwise arc disjoint dicycles. These two problems are NP-complete.Assume D has a 2-vertex cut. We show how to derive a minimum dicycle cover (a maximum dicycle packing) for D, by composing certain covers (packings) of the corresponding pieces. The composition of the covers is simple and was partially considered in the literature before. The main contribution of this paper is to the packing problem. Let be the value of a minimum integral dicycle cover, and * () the value of a maximum (integral) dicycle packing. We show that if = then a simple composition, similar to that of the covers, is valid for the packing problem. We use these compositions to extend an O(n³) (resp., O(n⁴)) algorithm for finding a minimum integral dicycle cover (resp., packing) from planar digraphs to K_3,3-free digraphs (i.e., digraphs not containing any subdivision of K_3,3).However, if , then such a simple composition for the packing problem is not valid. We show, that if the pieces satisfy, what we call, the stability property, then a simple composition does work. We prove that if = * holds for each piece, then the stability property holds as well. Further, we use the stability property to show that if = * holds for each piece, then = * holds for D as well.     

Current and Future Trends in Internet-Supported Mental Health Interventions

Despite growing research in the past two decades involving Internet-supported or online mental health interventions, there has been only a few attempts to provide a synthesis of the research findings and future trends. The Internet has grown exponentially during this time, providing greater access to a wider population than ever before. Consequently, online mental health interventions have the potential to be cost-effective, convenient, and reach a more diverse population than traditional, face-to-face interventions. This paper reviews and summarizes the current research for online mental health interventions and discusses future trends. These interventions range from psychoeducational static webpages and complex, personalized, interactive cognitive-behavioral-based self-help programs, to videoconferencing, self-help support groups, blogging, and professional-led online therapy. Future trends in online interventions include the greater prevalence of online therapy and the use of video chat and videoconferencing technologies to enhance and extend the therapeutic relationship. The use of texting or short message service (SMS), mobile communications, smart phone applications, gaming, and virtual worlds extends the intervention paradigm into new environments not always previously considered as intervention opportunities. We find that there is strong evidence to support the effective use and future development of a variety of online mental health applications.     

Returns on Lifetime Investments in Children in Egypt

Parental expectations about the companionship and assistance they will receive in later life from their children are key considerations in family formation decisions. We explore patterns of parents’ investment and the support and contact they receive from adult children in Egypt, where fertility is falling and sources of support at all life stages are in flux. Using data from a survey of older adults in Ismailia governorate, we consider parents’ past investments in childbearing, child survival, and children’s education and marriage, as well as recent assistance to adult children via housing, care for grandchildren, gifts, and money. The returns from children considered include economic assistance, instrumental support, and visits. Most parental investments are associated with frequent visits from children. The assistance children provide to parents is gendered: sons tend to provide economic transfers, whereas daughters tend to provide instrumental help. A greater number of surviving children is most strongly associated with parents’ receipt of multiple types of later-life returns. Investments in children’s education and marriage are not associated with assistance, but recent assistance to children—especially economic transfers and provision of housing—is associated with receiving instrumental assistance from adult children.