The demographic viewpoint in the vital and health statistics monographs of The American Public Health Association

The plan calls for monographs on 16 specific topics and a review volume. The specific topics include a monograph on fertility, another on marriage and divorce, and one on social and economic factors in mortality, all of which are of obvious demographic interest. The core of the development of the monographs dealing with the disease topics, and accidents, homicide, and suicide, is a tabulation program involving specific and age-adjusted death rates based upon the deaths in the United States for the three year period 1959-61 and the 1960 census of population. The program called for a set of standard tabulations common to each monograph and also a set of special tabulations tailored to meet the particular needs for each topic as specified by its authors. This wealth of demographic detail regarding mortality in the United States during 1959-61 fills only one aspect of its health picture. To fill out the health picture, use is being made of the great volume of morbidity data out of the National Health Interview and Examination Surveys and a wide variety of other specialized surveys. In all of these, the findings are invariably described in terms of the demographic characteristics of age and sex, and frequently in terms of such social-economic variables as education, income, work status, and occupational class.A large part of the content of the monograph on social and economic factors in mortality will come out of available results of the 1960 census-death certificate matching study at the University of Chicago. One important feature of this monograph, not contained in the Chicago study, is a regression and correlation analysis of total mortality in 202 Standard Metropolitan Statistical Areas in relation to a large number of social, economic, and climatic factors. Among the features in the monograph on fertility are chapters on the medical and biological characteristics of births, fecundity and family planning, and an analysis of cohort fertility trends. The monograph on marriage and divorce will make use of the detailed tabulations from the 1960 census on marital status in relation to education, race, parentage, earnings and other classifications of individuals and of husband and wife in married couples. It will also contain a matching study of divorce records in certain states for a short period before the census of 1960 with the returns in the census. The project is supported by a grant from the United States Public Health Service (CH 00075; formerly RG 08262). Publication will be by the Harvard University Press.     

Safety Nets and Scaffolds: Parental Support in the Transition to Adulthood

Using longitudinal data from the Youth Development Study (analytic sample N = 712), we investigate how age, adult role acquisition and attainments, family resources, parent-child relationship quality, school attendance, and life events influence support received from parents in young adulthood. Parental assistance was found to be less forthcoming for those who had made greater progress on the road to adulthood, signified by socioeconomic attainment and union formation. The quality of mother-child and father-child relationships affected parental support in different ways, positively for mothers, negatively for fathers. School enrollment, negative life events, and employment problems were associated with a greater likelihood of receiving support. The findings suggest that parents act as "scaffolding" and "safety nets" to aid their children's successful transition to adulthood.     

Fishy food facts: how much fish should we eat?

Food safety scares make headlines. Fish in particular causes worry: should we eat it for our health, or avoid it for the pollutants that it accumulates? David Mortimer explains how the Food Standards Agency decides how much fish it is safe for us to eat.     

Adolescence and Adult Work in the Twenty‐First Century

The transition from school to work is a story that meshes the life histories of youth and the economic and social development of societies. Drawing on reports from diverse regions of the world, this article describes the range of adolescent experiences as they encompass the completion of school and the commencement of adult work. As the 21st century begins, major threats to the preparation of youth for adult work include deficiencies in schools, hazards of the informal work sector, a lack of clear connections between school and work, and the misuse or underutilization of technology. Yet this transition is also a story of optimism, as the significance of youth for economic and social development is increasingly appreciated at the national and international levels. Accordingly, this article considers the broad policy implications of the survey and then details the lines of action that address challenges to the preparation of youth for adult work. Although many regions of the world share common challenges, the integration of youth into the 21st century world of work will depend on how each country formulates a unique response that is sensitive to its demographic profile, social institutions, cultural heritage, and economic conditions.     

One-sided trimming in small samples with asymmetric contamination

An estimator for location, given a sample of only four or five observations, is proposed. The underlying distribution on of the sample may (with probability p) be contaminated by an outlier from a rightly-skewed distribution. The estimator minimizes the maximum mean squared error over all values of p. In fact, there exists an estimator which is unbiased in both the outlier - free and extreme-outlier cases, but its mean square error is substantially higher than the mean squared error for the minimax estimator. Mean squared errors for various underlying distributional situations are calculated and compared with those of other location estimators such as the mean and the median.     

Estimating the number of factors to include in a high-dimensional multivariate bilinear model

We present two new statistics for estimating the number of factors underlying in a multivariate system. One of the two new methods, the original NUMFACT, has been used in high profile environmental studies. The two new methods are first explained from a geometrical viewpoint. We then present an algebraic development and asymptotic cutoff points. Next we present a simulation study that shows that for skewed data the new methods are typically superior to traditional methods and for normally distributed data the new methods are competitive to the best of the traditional methods. We finally show how the methods compare by using two environmental data sets.     

Explaining the Motherhood Wage Penalty During the Early Occupational Career

Prior research shows that mothers earn lower hourly wages than women without children, and that this maternal wage penalty cannot be fully explained by differences between mothers and other women in work experience and job characteristics. This research examines whether the residual motherhood wage penalty results from differences between mothers and other women in the accumulation of work interruptions and breaks in schooling. Using longitudinal data for 486 women followed from ages 19 to 31 in the Minnesota Youth Development Study, we find that accumulated months not in the labor force and not enrolled in school explain the residual pay gap between mothers and other women.     

A Further Examination of the “Occupational Linkage Hypothesis”*

In response to Lueptow, McClendon, and McKeon's (1979) recent criticisms of the “occupational linkage hypothesis,” we estimate a modified linkage model, using data obtained from a panel of male college graduates over a ten-year period. The findings indicate differences in the processes of socialization and occupational attainment depending on the character (business vs. professional) of the father's occupation. Specifically, paternal support was more strongly related to sons' extrinsic values in the business sector and to sons' intrinsic and people–oriented value orientations in the professional origin group. The distinctive patterns of value socialization persisted when socioeconomic status and grade point average were controlled. Extension of the linkage model to include sons' adult attainments indicates that the work values transmitted in the family have important implications for sons' occupational outcomes. Consideration of the discrepancy between these findings and those of other studies suggests that future investigators of the “occupational linkage hypothesis” should more closely attend to the socialization process, as it impinges on the child, and to the character of the linkages between parental work characteristics and children's psychological attributes.