Why self-care fails: Implementing policy at a low-income sickle cell clinic

This paper addresses health care service delivery—its practice and its meanings—to a low income African-American population. Drawing on fieldwork and interviews at a sickle cell clinic, I explain why assumptions in the literature on self-care do not apply to a population historically excluded from access to health services. Self-care, a practice in which the individual assumes primary responsibility for health care, is typically seen as empowering patients and reducing the use of professional health services. While these predictions may apply to white, middle-class populations, they were not borne out in the low-income African-American population I studied. Self-care did not increase client control, nor was it associated with sparing use of health services. In this paper I explain why this was the case. I argue that conditions of poverty and the meanings clients attach to self-care impinge upon the implementation of policy producing results directly contrary to those that are predicted.     

Moderating the Effects of Childhood Exposure to Intimate Partner Violence: The Roles of Parenting Characteristics and Adolescent Peer Support

We investigate parenting characteristics and adolescent peer support as potential moderators of the effects of childhood exposure to intimate partner violence (IPV) on adolescent outcomes. Lehigh Longitudinal Study (N=416) data include parent and adolescent reports of childhood IPV exposure. Exposure to IPV predicted nearly all adverse outcomes examined; however, after accounting for co‐occurring child abuse and early child behavior problems, IPV predicted only 1 outcome. Several moderator effects were identified. Parental “acceptance” of the child moderated the effects of IPV exposure on the likelihood of teenage pregnancy and running away from home. Both peer communication and peer trust moderated the relationship between exposure to IPV and depression and running from home. Peer communication also moderated the effects of IPV exposure on high school dropout. Interventions that influence parenting practices and strengthen peer support for youth exposed to IPV may increase protection and decrease risk of several tested outcomes.     

Toward a Mediation Model of Employability Enhancement: A Study of Employee‐Supervisor Pairs in the Building Sector

This study examines whether jobs that enable competence development and a constructive leadership style enhance workers' employability or career potential through their assumed positive relationship with work‐related flow (absorption, work enjoyment, and intrinsic work motivation). The authors conducted an explorative study with 303 pairs of employees and their direct supervisors working in a Dutch building company. Results indicate that self‐ratings of learning value of the current job and transformational leadership have an indirect relationship with supervisor ratings of employability through work‐related flow.     

The contraceptive revolution in Israel: changing family planning practices among ethnoimmigrant groups

This paper uses data from the 1974-1975 Israel Fertility Survey and the 1987-1988 Study of Fertility and Family Formation to examine trends in fertility control among ethnoimmigrant groups in Israel. From 1974 to 1988, Israel underwent extremely rapid economic growth and there occurred what might be considered a contraceptive revolution in the realm of family planning. Specifically, the nonuse of family planning and reliance on less effective techniques of fertility control (withdrawal and abortion) were largely replaced by more efficient modes (e.g., pill, IUD) of family size limitation. In addition, ethnic differences in patterns of fertility control diminished. Meanwhile, socioeconomic and cultural variables such as religiosity and income maintained their importance as determinants of variation of family planning practices among Israeli women.     

What is the effective sample size of a spatial point process?

Point process models are a natural approach for modelling data that arise as point events. In the case of Poisson counts, these may be fitted easily as a weighted Poisson regression. Point processes lack the notion of sample size. This is problematic for model selection, because various classical criteria such as the Bayesian information criterion (BIC) are a function of the sample size, n, and are derived in an asymptotic framework where n tends to infinity. In this paper, we develop an asymptotic result for Poisson point process models in which the observed number of point events, m, plays the role that sample size does in the classical regression context. Following from this result, we derive a version of BIC for point process models, and when fitted via penalised likelihood, conditions for the LASSO penalty that ensure consistency in estimation and the oracle property. We discuss challenges extending these results to the wider class of Gibbs models, of which the Poisson point process model is a special case.     

From Natural Variation to Optimal Policy? The Importance of Endogenous Peer Group Formation

We take cohorts of entering freshmen at the United States Air Force Academy and assign half to peer groups designed to maximize the academic performance of the lowest ability students. Our assignment algorithm uses nonlinear peer effects estimates from the historical pre‐treatment data, in which students were randomly assigned to peer groups. We find a negative and significant treatment effect for the students we intended to help. We provide evidence that within our “optimally” designed peer groups, students avoided the peers with whom we intended them to interact and instead formed more homogeneous subgroups. These results illustrate how policies that manipulate peer groups for a desired social outcome can be confounded by changes in the endogenous patterns of social interactions within the group.     

Demographic determinants of labour market in Poland in 1990-2000

The author examines factors affecting Poland's transition to a market economy, including changes in the age, sex, and spatial distribution of the labor force. Educational status is also considered. The analysis concerns the period 1975-2000, with emphasis on the years from 1988 to 1990.     

Measurement of adult mortality in less developed countries: a comparative review

"This paper compares the direct and indirect methods used to measure adult mortality in the developing world. No other approach can substitute fully for accurate and complete vital registration, but in many countries it is unrealistic to expect the registration system to cover the majority of the population in the foreseeable future.... The difficulties involved in measuring adult mortality using surveys and other ad hoc inquiries are discussed.... While the choice of methods must depend on each country's situation, direct questions require very large samples and are unreliable in single-round inquiries. On the other hand, although indirect methods provide less detailed and up-to-date information than is ideal, they are adequate for many practical purposes. In particular, the experience of the 1980s suggests that questions about orphanhood perform better than earlier assessments indicated, and recent methodological developments have circumvented some of the limitations of the indirect approach."