Social class and political participation: A review and an explanation

This paper reviews and explains the relationship between socioeconomic status and political participation from a structural perspective; i.e., social organization influences people's range of options, producing different rates of behavior among those in varying locations in the society. There are six categories of political participation: cognitive, expressive, organizational, electoral, partisan, and governmental. In each case, the poor display the lowest and the rich the highest rate of participation. This difference reflects variations in political and psychological resources and the structure of the electoral process. As a result, political benefits also differ by social class.     

Accidental fatalities in transport

Summary. The paper considers accidents on the different modes of transport. Accidents have many kinds of unwanted effects, though the paper focuses on just one: accidental fatalities. The paper reviews the main official sources of accident data and considers the use of past accident data. It then offers data and discussion on the numbers of accidental fatalities per year, passenger fatality rates, major accidents and the fatalities imposed by transport on third parties. The paper concludes with a brief discussion of communicating these results.     

A hygiene experiment in rural Bangladesh

In February 1987, 10 students from the health education department at the National Institute of Preventive and Social Medicine of Bangladesh conducted a before after only health education experiment concerning intestinal worm infestation and sanitation by interviewing at least 160 individuals in a village outside of Dhaka. 74.5% initially believed that the only action to take for intestinal worm infestation was to visit a physician and take medicines. After 30 days of intense health education efforts, a 38% increase in those who gave preventive answers occurred among the lower class and a 52% increase among the middle class. Nevertheless 50% of the poor and 37% of the middle class still believed in curative care. In the pretest, 85% did not know how the worms entered the intestine and, in the posttest, this percent fell to 25%. The pretest showed that the typical village member only had 1 correct answer concerning adverse effects of the worms. After intense health education, the number of correct answers of the typical respondent climbed to 2. Moreover, before the intervention, only 20% reported washing their hands correctly after defecation using either rash or soap. After intervention, 96% did so. On the other hand, no change occurred in water sources (2 public tube wells or dirt storage ponds) or the latrine situation. Financial restraints and/or social class may have been responsible for the lack of changes. For example, a tube well is a status symbol of the rich and it would offend the rich if lesser families used them. Further, even the middle class could not afford a sanitary latrine. Therefore the health education intervention had little effect on 2 major sources of the worm infestation problem.     

Migration and health

Investigation of migration and health often forces us to acknowledge that the types of migration (international, internal, and residential) interact with each other as well as other population parameters such as the age/sex structure, sexual activity, fertility, mortality, and family structure. Research on migration is often obscured by these interactions. In fact, the adoption of a health perspective in the design of migration research represents a substantial improvement over traditional approaches that are based on distinctions among the various types of population movement. This is because a health perspective treats population movement as a dynamic process by which individuals are related to specific locations by reason of their participation in human networks. In other words, migration is regarded as a human process rather than a discrete event, and accordingly, it becomes less important to describe the individual's involvement with human networks and the institutions sustaining them. The use of a health perspective in migration research often calls our attention to the ways in which the types of migration are interconnected. For example, a migrant from Mexico might exhibit considerable internal mobility and may circulate between Mexico might exhibit considerable internal mobility and may circulate between Mexico and the US over several years until he develops enough contacts in the US to settle in a particular community in which his personal contact with human networks and place-specific institutions are conducive to settlement. Through him, family members may attach to the community. In the process, they all encounter health risks, make demands on the health care system, change the demographic/health characteristics of both sending and receiving places, sometimes act as transmitting agents of disease to those with whom they interact and, undergo changes in their levels of personal development and well-being. A research perspective that investigates these processes will consider all of the types of movement and characterize them as dynamic processes rather than as discrete events. The articles in this issue all touch on the ways in which migration can affect the health of migrants, and show the circle range of ways migration and health are interrelated. A special introductory note also suggests Acquired Immunodeficiency Syndrome (AIDS) should receive special attention in the study of this interrelationship. The uneven distribution of AIDS is heightening concern about the health implications for receiving countries.     

Duration Adjustment of Acute Exposure Guideline Level Values for Trichloroethylene Using a Physiologically-Based Pharmacokinetic Model

Acute Exposure Guideline Level (AEGL) recommendations are developed for 10-minute, 30-minute, 1-hour, 4-hours, and 8-hours exposure durations and are designated for three levels of severity: AEGL-1 represents concentrations above which acute exposures may cause noticeable discomfort including irritation; AEGL-2 represents concentrations above which acute exposure may cause irreversible health effects or impaired ability to escape; and AEGL-3 represents concentrations above which exposure may cause life-threatening health effects or death. The default procedure for setting AEGL values across durations when applicable data are unavailable involves estimation based on Haber's rule, which has an underlying assumption that cumulative exposure is the determinant of toxicity. For acute exposure to trichloroethylene (TCE), however, experimental data indicate that momentary tissue concentration, and not the cumulative amount of exposure, is important. We employed an alternative approach to duration adjustments in which a physiologically-based pharmacokinetic (PBPK) model was used to predict the arterial blood concentrations [TCE(a)] associated with adverse outcomes appropriate for AEGL-1, -2, or -3-level effects. The PBPK model was then used to estimate the atmospheric concentration that produces equivalent [TCE(a)] at each of the AEGL-specific exposure durations. This approach yielded [TCE(a)] values of 4.89 mg/l for AEGL-1, 18.7 mg/l for AEGL-2, and 310 mg/l for AEGL-3. Duration adjustments based on equivalent target tissue doses should provide similar degrees of toxicity protection at different exposure durations.     

The impact of resources and family-level cultural practices on immigrant women’s workforce participation

This article aims to assess the extent to which women's labor force participation reflects culturally or situationally induced family strategies above and beyond the well-known effects of opportunities and constraints associated with education and the life cycle. We focus particularly on women immigrants from the former Yugoslavia in Australia, and explore the family strategies by comparing the Yugoslav women systematically to immigrant women from other parts of the Mediterranean world and to immigrant women from other parts of the Slavic world. To this end, we use data from the one percent public use sample of individual records of the 1981 Australian Census. We find that the labor force particiaation patterns of immigrant women from the former Yugoslavia are more shaped by education and less shaped by the life course than is true of other groups, although the life course matters for all of them. Indeed, in the impact of education on labor force they closely resemble the Eastern Europeans across most of the range of education. But in the impact of life cycle stage on participation they more closely resemble the Greeks and the Italians. This emphasizes how important it is that statistical agencies release data at the greatest possible level of detail: A country may belong in one group for some purposes, but in a different group for other purposes. We assess a number of explanations for birthplace differences in participation patterns, and find most wanting. We suggest that they may reflect culturally conditioned intergenerational wealth flows and patterns of time investiment in children and the elderly. M.D.R. Evans's research focuses on comparative, international analyses of stratification, ethnicity, culture, and gender. Her book, Prejudice or Productivity, is forthcoming from Westview Press.     

Testing for serial correlation in the presence of dynamic heteroscedasticity

Standard serial correlation tests are derived assuming that the disturbances are homoscedastic, but this study shows that asympotic critical values are not accurate when this assumption is violated. Asymptotic critical values for the ARCH(2)-corrected LM, BP and BL tests are valid only when the underlying ARCH process is strictly stationary, whereas Wooldridge's robust LM test has good properties overall. These tests exhibit similar bahaviour even when the underlying process is GARCH (1,1). When the regressors include lagged dependent variables, the rejection frequencies under both the null and alternative hypotheses depend on the coefficientsof the lagged dependent variables and the other model parameters. They appear to be robust across various disturbance distributions under the null hypothesis.     

Developing Responsive Preventative Practices: Key Messages from Children's and Families’ Experiences of the Children's Fund

As part of the prevention and social inclusion agenda, the Children's Fund, set up in 2000, has developed preventative services for children at risk of social exclusion. Drawing on a large qualitative dataset of interviews conducted in 2004/05 with children, young people and their parents/carers who accessed Children Fund services, this article analyses key practices and approaches valued by children and parents. These included: specialist support tailored to individual support needs, family‐oriented approaches, trusting relationships with service providers, multi‐agency approaches and sustainability of services. Finally, the article draws out key lessons for the future development of preventative services.