SEXUAL PRIVACY AND EARLY SEXUAL DEBUT IN NAIROBI INFORMAL SETTLEMENTS1

The purpose of this paper is to examine sexual privacy as a factor that may influence the relatively earlier sexual debut among the urban poor in Nairobi. 40 focus group discussions were held with people aged 13–17, 18–24, 25–49 and 50+ years, community leaders and service providers in four informal settlements of Nairobi. Lack of sexual privacy was identified as a major problem. Although adults were reported to use various means to acquire some measure of privacy, such as waiting for children to fall asleep, switching off the lights and separating the sleeping areas using curtains, these measures were found inadequate. The participants therefore associated young people's early initiation of sexual activity with lack of sexual privacy. Sexual privacy has not received adequate research attention as a dimension of poverty that influences young people's sexuality. More studies are called for to unravel the specific association between sexual privacy among adults and young people's sexual behaviour. The living conditions of the urban poor should also be addressed to mitigate the effects of lack of sexual privacy.     

CHANGING FAMILIES/CHANGING COMMUNITIES

Scholars writing about community in recent years have been more likely to lament its passing than celebrate its exemplars. What's missing in this recent revival of interest in community is a systematic link with work–family issues and, in particular, an explicit recognition that women's and men's work–family lives have changed dramatically in the post-World War II era. We investigate the consequences of structural shifts in our family and work lives for a sample of elite, managerial women in dual-earner marriages, a population for whom work and family concerns are both immediate and salient. Understanding changing definitions of, and trends in, family and work can provide a useful lens through which we can profitably address recent debates about the decline or resurgence of community and civic society. Our findings suggest that, although conceived differently than in previous decades, family remains central to our respondents’ sense of community and structures their civic engagement. In contrast with previous generations of women, however, work is also important, for defining women's sense of self and community and for offering an alternative venue for community service.     

Self‐Awareness in Human and Chimpanzee Infants: What Is Measured and What Is Meant by the Mark and Mirror Test?

The objective study of self‐recognition, with a mirror and a mark applied to the face, was conducted independently by Gallup (1970) for use with chimpanzees and monkeys, and by Amsterdam (1972) for use with infant humans. Comparative psychologists have followed the model (and assumptions) set by Gallup, whereas developmental psychologists have followed a different model (e.g., Lewis & Brooks‐Gunn, 1979). This article explores the assumptions in the definitions and methods of self‐recognition assessments in the 30 years since these initial studies, and charts the divergence between the developmental mark test and the comparative mark test. Two new studies, 1 with infant chimpanzees and 1 with infant humans, illustrate a reconciliation of the 2 approaches. Overt application of the mark, or other procedures related to how the mark is discovered, did not enhance mirror self‐recognition. In contrast, maternal scaffolding appears to enhance performance, perhaps by eliciting well‐rehearsed verbal responses (i.e., naming self). When comparable testing procedures and assessment criteria are used, chimpanzee and human infants perform comparably. A combined developmental comparative approach allows us to suggest that mirror self‐recognition may be based on a specific aspect of mental representation, the cognitive ability to symbolize.     

Smoking Prevalence and Antismoking Regulations in Transition Countries

As a number of new nations emerged in the early nineties, there has been a spurt in regulatory initiatives in transition countries toward nation building and socio-economic reforms. A key prerequisite to policy changes is an understanding of the related patterns and policies. This paper provides an overview of the smoking trends in transition nations, broken by gender and age, and the antismoking policies in place. In particular, four different types of non-price policies are studied. Comparisons with the rest of the world show that transition countries do not fare badly in terms of implementing antismoking policies and are, in fact, better in some cases than other countries. However, greater smoking prevalence for some population subgroups in transition nations suggests that either some other socio-economic factors influencing smoking prevalence might be at play or there might be some enforcement issues with the policies in place.     

Interpolating demography with families and households

This paper argues that the field of household and family demography serves a critical role in the development of our understanding of the determinants and consequences of population trends. Like the community, families and households are situated between the two levels at which demographic research is ordinarily conducted — the individual and the nation-state. The results of the papers in this issue are used to illustrate the critical ways that intergenerational and gender relationships shape demographic processes.     

A study of three-dimensional curves

In certain abnormalities of spinal shape, the long axis of the spine moves out of the median sagittal plane, producing both an axial torsion and a lateral deviation out of the usual front-back plane. Clinicians need to be able to assess rapidly and accurately whether or not an individual has such an abnormality. In this paper, we examine several case studies. These are analyzed using some simple summary statistics, and the use of these methods to infer abnormality is demonstrated. Using a simple fitted model for the data, an angular estimate of abnormality is obtained. Empirical measures of abnormality based on the eigenvalues of the covariance matrix are also determined. These methods are applied to a number of individuals for whom the surface spinal profiles have been recorded and who have been assessed as normal or abnormal by clinicians.     

Perfect samplers for mixtures of distributions

Summary. We consider the construction of perfect samplers for posterior distributions associated with mixtures of exponential families and conjugate priors, starting with a perfect slice sampler in the spirit of Mira and co-workers. The methods rely on a marginalization akin to Rao–Blackwellization and illustrate the duality principle of Diebolt and Robert. A first approximation embeds the finite support distribution on the latent variables within a continuous support distribution that is easier to simulate by slice sampling, but we later demonstrate that the approximation can be very poor. We conclude by showing that an alternative perfect sampler based on a single backward chain can be constructed. This alternative can handle much larger sample sizes than the slice sampler first proposed.     

Historical regional patterns of infant mortality in Austria

First an overview is given of the secular decline of infant mortality in Austria between 1820 and 1950 is given. Second the study analyses the historical regional differences of infant mortality in Austria comparing data for all 99 political districts (Politische Bezirke) for the period 1900 to 1950. The most important results are: At the turn of the 19th century infant mortality rates were generally lower in Alpine than in non-alpine regions and lower in cities than in their surrounding areas. This geographical pattern which remained constant until the 1950s was solely determined by differences in post-neonatal mortality rates. Plausible explanations for these regional differences are discussed.En premier lieu cette étude fournit une vue d'ensemble du déclin séculaire de la mortalité infantile en Autriche en 1820 et 1950. Elle analyse ensuite les différences régionales de mortalité infantile en comparant les données des 99 districts politiques (Politische Bezirke) autrichiens, de 1900 à 1950. Les principaux résultats sont les suivants: à la fin du XIX^e siècle les taux de mortalité infantile étaient en général plus faibles dans les régions alpines que dans les autres et plus faibles dans les villes que dans les aires adjacentes. Ce modèle géographique, qui est resté le même jusqu'en 1950, était uniquement déterminé par les différences entre les taux de mortalité post-néonatale. Des explications plausibles de ces différences régionales sont discutées ici.     

Do universal non‐contributory old‐age pensions make sense for rural areas in low‐income countries?

The need for old‐age security coverage in rural areas of many developing countries is rapidly increasing for several reasons, including population ageing and the weakening of family support networks. These trends have generated intense interest in policies that might help respond to the growing problem of rural old‐age destitution. The focus of our analysis is on one of the most promising alternatives under consideration: universal non‐contributory old‐age pensions. This model has some limitations and it is not appropriate for all developing countries, but it would be of potential benefit to far more than the six that have already implemented variants of this approach.     

Differentials in Adult Mortality and Activity Limitation by Years of Education in the United States at the End of the 1990s

This study examines mortality differentials and health disparities between educational groups within the 1998 adult population (ages 25 and older) in the United States. Mortality differentials are measured using average life expectancy and health disparities by expected years without activity limitation. The results indicate that for both sexes, higher education is associated with higher life expectancy. Those with higher levels of education also have higher life expectancy without activity limitation. Adults with higher education can also expect to enjoy a greater percentage of their expected lives free of any form of activity limitation. At each level of education, adult females have a higher level of activity limitation compared to adult males. At the same level of education, adult females expect to enjoy smaller percentages of their remaining lives free of activity limitation compared to adult males of the same age.