Gwyn Campbell,Suzanne Miers and Joseph C. Miller (eds), Women and Slavery. Vol.I: Africa,the Indian Ocean World and the Medieval North Atlantic

Paul Veyne (ed.), A History of Private Life from Pagan Rome to Byzantium, vol. 1 of Philippe Aries and Georges Duby (eds), A History of Private Life (1987), ix + 670 (Cambridge, Mass, and London, Belknap Press of Harvard University Press, £24.95).     

Impact of Adult Sons’ Incarceration on African American Mothers’ Psychological Distress

This longitudinal study examines the effect of sons’ incarceration on their mothers’ psychological distress. Interviews were conducted over the life course with a community cohort of African American mothers who had children in first grade in 1966 – 1967 when the study began (N =615). Thirty years later, their sons had significant rates of incarceration (22.4%). Structural equation modeling showed that the more recent the incarceration, the greater the mothers’ psychological distress, even controlling for earlier socioeconomic status and psychological well‐being. Financial difficulties and greater burden of grandparenting are associated with having a son incarcerated and they mediate the relationship between the incarceration and a mother’s psychological distress. Results suggest that incarceration has important effects on family members’ well‐being.     

The power of the circular cone test: A noncentral chi-bar-squared distribution

Pincus (1975) derived the null distribution of the likelihood-ratio test statistic for testing that the mean vector of a multivariate normal distribution is zero against the alternative that the mean vector lies in a circular cone. Under the null hypothesis, the likelihood-ratio test statistic has a chi-bar-squared distribution. We extend the results of Pincus by deriving the distribution of the likelihood-ratio test statistic under the alternative hypothesis. In a special case, the distribution is a “noncentral chi-bar-squared” distribution. To our knowledge, this is the first order-restricted testing problem for which the relationship between the null and alternative distributions of the test statistic is similar to the relationship in the linear-model setting. That is, the distribution of the likelihood-ratio test has a central form of a distribution under the null hypothesis and a noncentral form of the same distribution under the alternative.     

Not for Bread Alone—Motivation Among Hospital Employees in Singapore

Through a series of interviews and a literature review this paper uncovers the key sources of motivation among employees in hospitals in Singapore. The study examines the use of several non-monetary rewards Singaporean managers can rely on to motivate their employees in service industries. One vital finding of this study is that there should be value congruence and person/environment-fit.     

The validity of the occupational stress indicator

This paper investigates the validity of four subscales of the Occupational Stress Inventory (OSI). Data derived from a sample of British managers are used to generate a multitrait-multimethod matrix. The results obtained suggest that three of the four OSI sales (job satisfaction, mental health, type A behaviour) show acceptable validity. The fourth scale (locus of control) needs further development. Further analysis, using multiple regression procedures, was conducted to explore the validity of the theoretical ideas underlying the OSI. The results reveal that both sources of pressure at work and type A behaviour are linked to mental health and job satisfaction.     

HRM Practices and Employee Commitment: Possibilities, Pitfalls and Paradoxes

Much recent writing on Human Resources Management (HRM) has emphasized the desirability of a committed workforce and the central role of HRM practices in establishing and maintaining such commitment. Little empirical evidence for such effects has been presented however, and the conceptualization of employee commitment has often been confused, failing to recognize its multi–dimensional nature. Researchers have sought to identify the antecedents of commitment, concentrating on personal/demographic, task, role and supervisory style variables taken from job satisfaction research. With regard to organizational and career commitment, it may be more fruitful to examine the impact of HRM policies and practices. Several studies undertaken by the authors demonstrating the impact on employee commitment of such HRM practices as selection, assessment, induction and training are reviewed, indicating the possibilities for research and practice in this area. Such studies also reveal some pitfalls in the over–simple, uncritical models of commitment often presented, and some paradoxical findings from the authors' own work are used to present a more adequate perspective on the commitment process.     

Goodness-of-fit test for uniform stochastic ordering among several distributions

The likelihood-ratio test (LRT) is considered as a goodness-of-fit test for the null hypothesis that several distribution functions are uniformly stochastically ordered. Under the null hypothesis, H₁ : F₁ ? F₂ ?···? F_N, the asymptotic distribution of the LRT statistic is a convolution of several chi-bar-square distributions each of which depends upon the location parameter. The least-favourable parameter configuration for the LRT is not unique. It can be two different types and depends on the number of distributions, the number of intervals and the significance level α. This testing method is illustrated with a data set of survival times of five groups of male fruit flies.