A longitudinal analysis of infant and senescent mortality using mixture models

We construct a mixture distribution including infant, exogenous and Gompertzian/non-Gompertzian senescent mortality. Using mortality data from Swedish females 1751–, we show that this outperforms models without these features, and compare its trends in cohort and period mortality over time. We find an almost complete disappearance of exogenous mortality within the last century of period mortality, with cohort mortality approaching the same limits. Both Gompertzian and non-Gompertzian senescent mortality are consistently present, with the estimated balance between them oscillating constantly. While the parameters of the latter appear to be trending over time, the parameters of the former do not.     

Workforce Issues in Residential Care Facilities in Rural China

This study examined contemporary frontline workforce issues related to residential care for elders in rural China. Residential facilities in rural China are in transition from exclusively providing shelter to childless elders to providing long-term care for frail elders. These facilities are also under pressure to improve the quality of services that they provide. The study is based on in-depth interviews with administrators and field observations of facilities. The study focused on the following issues related to the workforce: recruitment and retention, training, work environment, workforce organization, regulations, compensation, and career ladders. The implications of resident characteristics for demands on the work force were examined. The study found that lack of skilled personnel is one of the major reasons that the overwhelming majority of facilities deny admission to frail and demented elders. Improving workers’ skill is critical if these facilities are to meet the increasing demand for institutional long-term care needs.     

Infant feeding and asthma: is breast milk best?

Asthma is the most commonly occurring chronic childhood disease in the United States and is the leading cause of hospitalization and missed school days. In this article, I examine whether differences in asthma diagnosis can be attributed to differences in breastfeeding incidence and duration. Using data from the Fragile Families and Child Wellbeing Survey, I examine whether unobserved heterogeneity in the breastfeeding decision plays a role in childhood asthma propensity. I use the recursive bivariate probit framework to account for potential endogeneity by modeling the breastfeeding and asthma equations jointly. Results indicate that after accounting for the unobserved heterogeneity found in infant feeding practices, breastfeeding leads to lower rates of asthma diagnosis in children at age one. Breastfeeding for at least 3 months appears to have the strongest effects in children diagnosed at age one. However, there are no discernible effects of breastfeeding on the incidence of asthma by age three. These results indicate that breastfeeding can result in lower rates of wheezing and better respiratory health in small children.     

Effects of Posture on Newborn Crying

Acoustic properties of the cries of 14 infants were evaluated at both 2 and 4 weeks of age when the infants were lying in a supine position and when they were sitting upright in a car seat. In the upright position, infants' breathing was more rapid and showed less individual variability. The fundamental frequency of their cries increased in the upright position, but this increase was likely attributable to increased arousal or distress, not to posture per se. There were no differences in acoustic measures related to vocal tract shape in the supine versus upright positions. Across age, there was a decline in fundamental frequency. Individual difference stability of most acoustic measures was moderate to high. The importance of postural effects on the acoustic features of cries was discussed.     

The Legal Status of Turks in Germany

Turks in Germany constitute the single largest non-national group living in the member states of the European Union. This essay examines the legal dimensions of their entry, residence and integration in Germany during the 1990s up to 2002. The evidence shows that, despite long-term settlement patterns, Turks in Germany have not achieved a high level of formal inclusion. However, recent policy reforms have already gone some way to improving their situation, and the impact of planned reforms should equally ensure that this process continues in the future.     

Personal Identity and Civic Responsibility: "Rising to the Occasion" Narratives and Generativity in Community Action Student Interns

Twenty–two students in a community action certificate program supplied "rising to the occasion" narratives during summer–long internships. They also filled out measures of generativity. Twenty–one students in an international studies certificate program that also included a summer internship served as a comparison group. Both groups reported equal personal growth from rising to the occasion experiences and no differences on measures of optimism, self–esteem or generativity. However, the community action students linked their personal growth experiences to future community service; a regression analysis also revealed that the best predictor of their stress–related growth was their level of generative concern. No comparable links emerged for the comparison group. Implications for cultivating connections between personal identity and civic responsibility through service–learning are discussed.     

Structure and uncertainty: Graphical models for understanding complex data

Statistics is fundamental to making sense of the complexity of modern science. From the micro-level of the human genome to the macro-level of the universe, scientists need statistical models to help them extract meaning from empirical observations. Graphical models have been used across a wide variety of disciplines for building multivariate probabilistic models to represent, and draw inference about, complex phenomena. Nicky Best and Peter Green explain the ideas behind graphical models and show how they can be used to help tackle the challenges of complex statistical problems.     

Leader behaviors and career derailment potential: A multi-analytic method examination of rating source and self–other agreement

Based on extensive research that views leadership as a multi-faceted phenomenon, we examined how the relationships between task-oriented and relationship-oriented leader behaviors and career derailment potential vary by observer perspective. We present findings using three different analytical techniques: random coefficient modeling (RCM), relative weight analysis (RWA), and polynomial regression (PR). RCM findings suggest that self-, direct report, peer, and supervisor ratings of leader behaviors differ and are associated with career derailment potential. RWA results indicate that self-ratings matter the least, whereas peer ratings of leader behaviors typically matter the most in predicting career derailment potential. PR analyses indicate that career derailment potential is lowest when self-ratings are lower than other ratings of leader behaviors and/or when self–other ratings converge on higher, rather than lower, ratings of leader behaviors. Implications for leadership and self–other agreement research and professional practice are discussed.