Risk, Statistical Inference, and the Law of Evidence: The Use of Epidemiological Data in Toxic Tort Cases

Toxic torts are product liability cases dealing with alleged injuries due to chemical or biological hazards such as radiation, thalidomide, or Agent Orange. Toxic tort cases typically rely more heavily than other product liability cases on indirect or statistical proof of injury. There have been numerous theoretical analyses of statistical proof of injury in toxic tort cases. However, there have been only a handful of actual legal decisions regarding the use of such statistical evidence, and most of those decisions have been inconclusive. Recently, a major case from the Fifth Circuit, involving allegations that Benedectin (a morning sickness drug) caused birth defects, was decided entirely on the basis of statistical inference. This paper examines both the conceptual basis of that decision, and also the relationships among statistical inference, scientific evidence, and the rules of product liability in general.     

Racial intermarriage pairings

Most studies of racial intermarriage rely on the prevalence of intermarriage to measure the strength of group boundaries, without scrutinizing the nature of intermarriage pairings. Examination of intermarried couples' characteristics reveals (1) that intermarriages and endogamous marriages follow different patterns, and (2) that intermarriage pairings for some groups reflect a generalized racial status hierarchy. According to evidence from the 1990 U.S. Census PUMS, patterns in blacks' and Mexican Americans' marriages with whites suggest that a generalized racial status hierarchy disadvantages members of these minority groups. For marriages between Japanese Americans and whites, however, crossing the group boundary does not affect couples' characteristics.     

Stakeholders’ partnership approach to infrastructure provision and management in developing world cities: lessons from the Sustainable Ibadan project

In recent decades unprecedented urbanization has constituted a huge challenge to urban infrastructure development and management in most developing countries. Meanwhile, the appropriateness of conventional urban planning approaches to the improvement of urban environmental conditions in the face of deteriorating urban environment have often been questioned. It became inevitable to search for new approaches particularly in the context of low-income urban communities. International organizations such as the United Nations Development Programme (UNDP) and the United Nations Centre for Human Settlements (UNCHS) have subsequently initiated strategies to evolve a participatory approach to the development and management of the urban environment. One of such strategies is the Sustainable City Programme (SCP) which aims to provide municipal authorities and city stakeholders in the public, private and community sectors with an enhanced capacity for environmental planning and management. The programme is being implemented in several cities in parts of the developing world, including Ibadan – the Sustainable Ibadan Project (SIP) – in Nigeria. This paper examines the partnership approach to urban environmental infrastructure improvement, development and management as represented by the SIP. The relevance of the participatory partnership approach of the SIP for cities in parts of developing regions is examined. The paper implicitly stresses that bottom-up participatory stakeholder partnership is a strategy capable of enlisting the financial, material resources and expertise of various sectors of the urban community towards the improvement of urban environmental infrastructure. The paper presents preliminary findings of a study. Although traditional appraisal techniques were not employed, nonetheless, the paper presents a discussion of the processes and dynamics of the SIP on the basis of which some useful lessons may be drawn.     

Variability of water quality,metals and phytoplankton community structure in urban stormwater ponds along a vegetation gradient

Stormwater Ponds (SPs) are common throughout urbanizing environments, yet their ecological role has not been well established. SPs are primarily designed for hydrological control of stormwater, but many are also designed to attenuate the quality of runoff prior to discharge. Thus, SPs likely serve as an important land-water linkage between terrestrial and aquatic systems in urban areas. In this study, we characterized 22 SPs and 3 natural reference ponds from Durham Region, Ontario, Canada representing a gradient in emergent plant cover. There was high variability and wide ranges in water quality parameters among SPs. The percentage of impervious surface served as a measure of urbanization intensity, and was a significant driver of conductivity, chloride and total suspended solids regardless of emergent vegetation cover. In fact, only water temperature (r?=??0.61) was found to significantly correlate with vegetation cover. This suggests a minimal role for emergent vegetation in mediating SP water quality. SPs had notably higher conductivity and runoff-metals (Cu, Zn, Pb, and Cr) than reference ponds, but nutrients (Total P and Total N) and algal biomass did not significantly differ between SPs and reference ponds. Dominant phytoplankton groups included blue-green and euglenid algae, both of which are indicators of eutrophic and high organic systems, respectively. The blue-green genus Microcystis was detected in all ponds, and was the dominant taxon in most SPs. This raises concern that SPs may serve as reservoirs of toxin-producing algae. Multivariate analyses of metals, water quality variables and algal species composition showed considerable dissimilarity among SPs, yet comparably high similarity among reference ponds. This indicates that SPs are dynamic and diverse systems despite their engineered origins. Such broad gradients in water quality characteristics also imply variable impacts to receiving waters in the same region.     

“Feeling Warmth and Close to Her”: Communication and Resilience Reflected in Turning Points in Positive Adult Stepchild–Stepparent Relationships

With the goal of understanding the development of positive stepchild–stepparent relationships, the researchers focused on turning points characterizing the interaction of adult stepchildren who have a positive bond with a stepparent. Engaging a relational turning points perspective, 38 stepchildren (males and females, ages 25 to 52 years old) who reported a positive stepparent relationship were interviewed, generating 269 turning points which were categorized into 15 turning point types and coded by valence. Turning points occurring most frequently were: prosocial actions, quality time, conflict/disagreement, changes in household/family composition, and rituals. Findings are discussed, including implications for developing and enacting resilient and positive stepchild–stepparent relationships and future directions for researchers wanting to focus on positive family interaction.     

The contribution of network research to managerial culture and practice

Although research on social networks has gained significant influence in the academic world, several factors seem to have lowered its echo in the business world. It is still unclear how this fast-growing stream of research has translated into solid implications for managerial action and decision making. Based on a review of recent research, this paper attempts to provide evidence that network research does have practical relevance. We focus on five areas where network research has introduced new angles and renewed the understanding of how organizations should tackle management issues. We also suggest directions for future research, with the same objective of placing the emphasis on strengthening the contribution of the approach to management practices.     

Substance use and its relationship to family functioning and self-image in adolescents

This study examined associations between substance use, family functioning, and self-image among four ethnic adolescent groups. Three thousand three hundred and fifteen 8th and 9th grade students were recruited from 10 schools in Los Angeles County. Participants completed a paper-and-pencil survey regarding their alcohol and marijuana use, along with their perceived family functioning and self-image and other demographic variables. Ordinal logistic regression was performed to examine associations. Results indicated that both family functioning and self-image were significantly associated with alcohol and marijuana use. Those who scored lower on family functioning and self-image were at increased risk for substance use. Furthermore, students who scored low in both family functioning and self-image were about twice as likely to report using alcohol.