The burdens of social capital: How socially-involved people dealt with stress after Hurricane Katrina

Research shows that those with greater social capital enjoy better physical and mental health. The current study illuminates a paradox of social capital which may afflict those involved in traumatic events. Several years of survey data reveal a dynamic picture of the link between social capital and stress following Hurricane Katrina. Results reveal that initially after Katrina, those who were more socially embedded carried the greatest load with respect to helping the displaced population, thus experiencing more stress. But over time, the most socially-involved then snapped back from their stressful experiences more rapidly than isolates. This confirms that over the course of stressful events, social involvement first exposes people to more stress, but as time passes, provides them a significant buffer against negative psychosocial experiences.     

THE FEMA TRAILER PARKS: NEGATIVE PERCEPTIONS AND THE SOCIAL STRUCTURE OF AVOIDANCE

In recent years, negative media attention has fostered the impression that Federal Emergency Management Agency (FEMA) parks are social wastelands filled with criminal elements and other undesirables. FEMA parks have subsequently come to be viewed by some as a major threat to the safety and quality of life of the local communities in which they are situated. This analysis addresses attitudes toward FEMA trailer parks in Baton Rouge after Hurricane Katrina among Baton Rouge residents. Drawing on the Locally Undesirable Land Use/Not in My Backyard (LULU/NIMBY) literature, the contact hypothesis, and a broad paradigm of social status and social control, we hypothesize that spatial proximity, contact, and social status will influence negative perceptions of the parks, while these same factors along with the negative perceptions will influence avoidance behaviors. The results indicate that living near a FEMA park is associated with less negative perceptions, while actually seeing trailer park residents is associated with more negative perceptions and a greater odds of avoidance, particularly changing driving routes. Whites are particularly concerned about crime associated with the parks, but interracial trust reduces negative perceptions of the parks and the likelihood of avoidance. Those who are likely to end up in a FEMA park if they were in the same situation are more friendly toward the parks and less likely to use avoidance techniques, and negative perceptions themselves are strong predictors of avoidance behaviors. We conclude with a discussion of directions for future research.     

The Enduring Significance of Racism: Discrimination and Delinquency Among Black American Youth

Prominent explanations of the overrepresentation of Black Americans in criminal justice statistics focus on the effects of neighborhood concentrated disadvantage, racial isolation, and social disorganization. We suggest that perceived personal discrimination is an important but frequently neglected complement to these factors. We test this hypothesis with longitudinal data on involvement in general and violent juvenile delinquency in a sample of Black youth from a variety of communities in 2 states. We examine the direct effects of concentrated disadvantage and racial isolation and the direct and mediating effects of social organization, support for violence, and personal discrimination. Consistent with our hypothesis, perceived personal discrimination has notable direct effects on both general and violent delinquency and is an important mediator between neighborhood structural conditions and offending; moreover, its effects exceed those associated with neighborhood conditions.     

Improving the contributions of technology assessment to the health care system of the U.S.A.

Summary Based on 14 case studies of highly effective therapies and the reasons they succeeded less frequently than they could, we propose a variety of steps to improve the health care system of the U.S.A. Whatever proposal emerges from current national debates until innovations are shown to be safe and effective, they should not be supported; when slightly better technologies are much more expensive than other good ones we need to consider appropriate choices carefully; simplified billing and bookkeping would reduce our costs; when a technology is rapidly introduced cautionnary measures may be needed; tracking immunization and repairing their omissions requires a new system; educational programs such as seen effective in hypertension should be applied in other areas such as vaccination; in organ transplantation the nation should consider “presumed consent”; our payment system sometimes creates perverse incentives and therefore needs review; and the preferences of the public in allocation of health resources need to be discovered once the public is informed about the issues. Research supported by Andrew W. Mellon Foundation.     

A modified random-effect procedure for combining risk difference in sets of 2×2 tables from clinical trials

Summary Meta-analyses of sets of clinical trials often combine risk differences from several 2×2 tables according to a random-effects model. The DerSimonian-Laird random-effects procedure, widely used for estimating the populaton mean risk difference, weights the risk difference from each primary study inversely proportional to an estimate of its variance (the sum of the between-study variance and the conditional within-study variance). Because those weights are not independent of the risk differences, however, the procedure sometimes exhibits bias and unnatural behavior. The present paper proposes a modified weighting scheme that uses the unconditional within-study variance to avoid this source of bias. The modified procedure has variance closer to that available from weighting by ideal weights when such weights are known. We studied the modified procedure in extensive simulation experiments using situations whose parameters resemble those of actual studies in medical research. For comparison we also included two unbiased procedures, the unweighted mean and a sample-size-weighted mean; their relative variability depends on the extent of heterogeneity among the primary studies. An example illustrates the application of the procedures to actual data and the differences among the results. This research was supported by Grant HS 05936 from the Agency for Health Care Policy and Research to Harvard University.     

Analysis of supersaturated designs via the Dantzig selector

A supersaturated design is a design whose run size is not enough for estimating all the main effects. It is commonly used in screening experiments, where the goals are to identify sparse and dominant active factors with low cost. In this paper, we study a variable selection method via the Dantzig selector, proposed by Candes and Tao [2007. The Dantzig selector: statistical estimation when p$p$ is much larger than n$n$. Annals of Statistics 35, 2313–2351], to screen important effects. A graphical procedure and an automated procedure are suggested to accompany with the method. Simulation shows that this method performs well compared to existing methods in the literature and is more efficient at estimating the model size.     

Linking Community Context to Quality of Parenting: A Study of Rural Families1

Abstract Virtually all past studies of the effect of community context on families and children have focused on large metropolitan communities. Using a sample of divorced women living in small, Midwestern communities, the present study tests a model of the processes whereby community structure influences parenting practices. Results obtained through structural equation modeling supported the hypotheses. High concentrations of disadvantaged people within a community were indirectly related to parenting through community social disorganization. Community social disorganization had a direct effect on quality of parenting, as well as indirect effects through negative events, access to social support, and depressed mood. The various methodological and theoretical implications of these findings are considered.     

Business Ethics in the curriculum: A stranger in a strange land

An analysis of the place of Business Ethics in the curriculum.