Toward a Mediation Model of Employability Enhancement: A Study of Employee‐Supervisor Pairs in the Building Sector

This study examines whether jobs that enable competence development and a constructive leadership style enhance workers' employability or career potential through their assumed positive relationship with work‐related flow (absorption, work enjoyment, and intrinsic work motivation). The authors conducted an explorative study with 303 pairs of employees and their direct supervisors working in a Dutch building company. Results indicate that self‐ratings of learning value of the current job and transformational leadership have an indirect relationship with supervisor ratings of employability through work‐related flow.     

The contraceptive revolution in Israel: changing family planning practices among ethnoimmigrant groups

This paper uses data from the 1974-1975 Israel Fertility Survey and the 1987-1988 Study of Fertility and Family Formation to examine trends in fertility control among ethnoimmigrant groups in Israel. From 1974 to 1988, Israel underwent extremely rapid economic growth and there occurred what might be considered a contraceptive revolution in the realm of family planning. Specifically, the nonuse of family planning and reliance on less effective techniques of fertility control (withdrawal and abortion) were largely replaced by more efficient modes (e.g., pill, IUD) of family size limitation. In addition, ethnic differences in patterns of fertility control diminished. Meanwhile, socioeconomic and cultural variables such as religiosity and income maintained their importance as determinants of variation of family planning practices among Israeli women.     

What is the effective sample size of a spatial point process?

Point process models are a natural approach for modelling data that arise as point events. In the case of Poisson counts, these may be fitted easily as a weighted Poisson regression. Point processes lack the notion of sample size. This is problematic for model selection, because various classical criteria such as the Bayesian information criterion (BIC) are a function of the sample size, n, and are derived in an asymptotic framework where n tends to infinity. In this paper, we develop an asymptotic result for Poisson point process models in which the observed number of point events, m, plays the role that sample size does in the classical regression context. Following from this result, we derive a version of BIC for point process models, and when fitted via penalised likelihood, conditions for the LASSO penalty that ensure consistency in estimation and the oracle property. We discuss challenges extending these results to the wider class of Gibbs models, of which the Poisson point process model is a special case.     

From Natural Variation to Optimal Policy? The Importance of Endogenous Peer Group Formation

We take cohorts of entering freshmen at the United States Air Force Academy and assign half to peer groups designed to maximize the academic performance of the lowest ability students. Our assignment algorithm uses nonlinear peer effects estimates from the historical pre‐treatment data, in which students were randomly assigned to peer groups. We find a negative and significant treatment effect for the students we intended to help. We provide evidence that within our “optimally” designed peer groups, students avoided the peers with whom we intended them to interact and instead formed more homogeneous subgroups. These results illustrate how policies that manipulate peer groups for a desired social outcome can be confounded by changes in the endogenous patterns of social interactions within the group.     

Demographic determinants of labour market in Poland in 1990-2000

The author examines factors affecting Poland's transition to a market economy, including changes in the age, sex, and spatial distribution of the labor force. Educational status is also considered. The analysis concerns the period 1975-2000, with emphasis on the years from 1988 to 1990.     

Measurement of adult mortality in less developed countries: a comparative review

"This paper compares the direct and indirect methods used to measure adult mortality in the developing world. No other approach can substitute fully for accurate and complete vital registration, but in many countries it is unrealistic to expect the registration system to cover the majority of the population in the foreseeable future.... The difficulties involved in measuring adult mortality using surveys and other ad hoc inquiries are discussed.... While the choice of methods must depend on each country's situation, direct questions require very large samples and are unreliable in single-round inquiries. On the other hand, although indirect methods provide less detailed and up-to-date information than is ideal, they are adequate for many practical purposes. In particular, the experience of the 1980s suggests that questions about orphanhood perform better than earlier assessments indicated, and recent methodological developments have circumvented some of the limitations of the indirect approach."     

Age-sex structure of the United States in 2000: Early results from Census 2000

Recently data on age and sex for the United States have beenreleased in the Census 2000 data product Summary File 1. This paper presents someearly analysis on the shape of the age and sex structure from Census 2000 data throughstatistics and graphics on national and sub-national levels. Also highlighted are comparisonswith data from the 1990 census.     

Indonesian survey looks at adolescent reproductive health

The Baseline Survey of Young Adult Reproductive Welfare in Indonesia, conducted from September to December 1998, provides information about young Indonesians on topics concerning work, education, marriage, family life, sexuality, fertility, and HIV/AIDS and other sexually transmitted diseases. The survey interviewed 4106 men and 3978 women aged 15-24 years in three provinces of Java. Survey findings showed that 42% of the women and 8% of the men are currently or have been married. There was a strong inverse relationship between marriage and schooling, which suggests that greater educational attainment and a higher average age at marriage are likely to go together. Although most young couples prefer to delay and space births, only half of currently married young women are using any type of contraception. These results indicate that there is a need for better reproductive health care as well as improved reproductive health education. Moreover, the current economic crisis has lead to a decline in the use of the private sector for health care. Instead, young people are using the less-expensive government services, and young women are turning to pharmacies and midwives rather than to private doctors to obtain contraceptives. These findings have several policy implications including the need for reproductive health programs that provide services needed by young people.     

Survival of related individuals: an extension of some fundamental results of heterogeneity analysis

"Many ideas in the analysis of heterogeneous mortality are based on the relationship between individual and observed hazard rates. This connection is established with the help of conditional averaging procedure: The observed risk of death at age x is calculated among those who survive this age. The analogy of this result for bivariate survival model with correlated individual hazards is derived. In the case of correlated frailty model the parametric specification of the mean, variance and correlation coefficient of the bivariate frailty distribution among survivors is obtained. The relationship between local association measure and the characteristics of the bivariate frailty distribution among survivors is established." (SUMMARY IN FRE)