A concentration study of principal components

Influence functions are commonly used as diagnostic tools in order to investigate sensitivity aspects in principal component analysis. This paper suggests a practical alternative for the eigenvalues by introducing a sensitivity measure derived from the classical Lorenz curve and associated Gini index. The results are illustrated by analysing an example.     

Business teaching in the CIS States

The author draws on his experience teaching business concepts to executive students from former centrally-planned economies of the Confederation of Independent States, particularly Tashkent. Several lessons can be learned. Most important is that the students' perceptions of Western business knowledge is very different from those in the West. To bridge these different perceptions, the author suggests starting from a common knowledge base, using only concrete and specific work situations, making tacit knowledge explicit through imagination, analogies and metaphors, and giving priority to the process of introducing new business practices.     

Santé mentale et travail,entre plaisir et souffrance: quand le normal devient pathologique

Mental health in the workplace introduces a basic viewpoint to better understand the actual dynamic relationship between the individual and work in highly productive organisations. It is particularly visible in a hypermodern society, that is, a society where performance and productivity count on the workers’ free involvement and creativity. Concepts of mental health, social norms, normality and pathology, work and organisation are first defined. The main argument is then developed around the different dimensions describing the neoproductivist trend in many societies, in the occidental world but also in many others countries, like Japan, to name one. This neoproductivist ideology, based on neoliberal economy and the neo-Taylorist social approach of work organisation, produces for many workers a syndrome called ‘hyperactivity’ at work. There is a specific combination of great demands on the workers’ performance and involvement in the organisation on one end, and a great appeal to excellence and self-development on the other end. Studies in different organisations, unions, highly-technological enterprises, a television station and universities indicate that this syndrome of hyperactivity comes to be the norm, the reference, for the majority. Performance union leaders, leading scientists, television performers, highly-skilled technicians are some examples of people who become models of working behaviour in the workplace. This new ideology has consequences in all spheres of society and calls for a critical appraisal and research: clinical sociology can be a proper tool to address this challenge.     

Mortality by cause in the USSR in 1970–1987: the reconstruction of time series

This paper is the first step in an exploration of Soviet cause-of-death statistics which became accessible after 1986. Its main aim is the reconstruction of consistent annual series for the period 1970–1987 in spite of changes in cause-of-death classification caused by the 1980 revision of the Soviet nosological system. In a second part, the series thus reconstructed are analysed to describe the main features of the evolution of mortality during these two decades, using first standardized mortality rates for several very important specific causes and, second, using a method of decomposition of life expectancy changes. For the first time, trends in causes of death are thus shown for the crucial period where life expectancy has grown again after two decades of regression.Cet article constitue la première étape d'une exploration des statistiques soviétiques de décès par cause, devenues disponibles à partir de 1986. Il a pour principal objectif la reconstruction de séries annuelles cohérentes pour la période 1970–1987, en traitant les ruptures introduites par la révision de la Classification soviétique de 1980. La méthode utilisée pour ce faire est exposée dans la première partie. Dans une deuxième partie, les résultats ainsi obtenus permettent de décrire les grands traits de l'évolution de la mortalité au cours de ces deux décennies, d'abord sur la base de taux comparatifs de mortalité pour des causes spécifiques, puis grâce à une décomposition des variations de l'espérance de vie. Pour la première fois on peut ainsi suivre l'évolution des causes de décès dans une période déterminante au cours de laquelle, après deux décennies de recul, les progrès de l'espérance de vie ont repris.     

Unmet Needs for Assistance with ADLs and IADLs: A Measure of Healthy Life Expectancy

Measures of healthy life expectancy have beendeveloped over the last thirty years to evaluate thequality of life of an increasing life expectancy.These measures are usually accounting for prevalencerates of either disability or physical dependence inperforming everyday activities. Although they allowfor a better assessment of quality of life, they arenot reflecting the fact that a disabled person mightbe receiving adequate or inadequate assistance forthese activities. In a context of population aging,where our health care system will have to deal moreand more with chronic disease instead of acutedisease, it is imperative to develop a measure thatwill account for the adequacy of the assistanceprovided to the disabled elderly population. Usingdata from the 1986 Health and Activity LimitationSurvey, we are introducing a measure of healthy lifeexpectancy which will fill this gap. We present theconstruction of this measure of population health anddiscuss its usefulness in assessing policies at amacro level.     

Intermarriage and the risk of divorce in the Netherlands: the effects of differences in religion and in nationality, 1974-94

A textbook hypothesis about divorce is that heterogamous marriages are more likely to end in divorce than homogamous marriages. We analyse vital statistics on the population of the Netherlands, which provide a unique and powerful opportunity to test this hypothesis. All marriages formed between 1974 and 1984 (nearly 1 million marriages) are traced in the divorce records and multivariate logistic regression models are used to analyse the effects on divorce of heterogamy in religion and national origin. Our analyses confirm the hypothesis for marriages that cross the Protestant-Catholic or the Jewish-Gentile boundary. Heterogamy effects are weaker for marriages involving Protestants or unaffiliated persons. Marriages between Dutch and other nationalities have a higher risk of divorce, the more so the greater the cultural differences between the two groups. Overall, the evidence supports the view that, in the Netherlands, new group boundaries are more difficult to cross than old group boundaries.     

Is the SOGS an Accurate Measure of Pathological Gambling Among Children, Adolescents and Adults?

The South Oaks Gambling Screen (SOGS) is widely used to assess the prevalence of pathological gambling. For a variety of reasons, this instrument may not provide an accurate rate of the prevalence of pathological gambling. In this paper, one source of error in data provided by the SOGS is investigated. It is argued that individuals may not fully understand the meaning of some items, and that clarification of the meaning of misunderstood items may in some cases lead to a changed score on the scale. The present study evaluates respondents' understanding of the SOGS items. The results from three studies are reported, each using a different sample: grade school children, adolescents and adults. It was hypothesised that (1) participants would not understand some items of the SOGS, (2) problem gamblers and probable pathological gamblers would be more inclined to interpret items incorrectly than would non-problem gamblers and, (3) consistent with the first two hypotheses, clarification of items would decrease the number of participants identified as problem gamblers or probable pathological gamblers. The data obtained supported hypotheses 1 and 3. Furthermore, hypothesis 2 was supported for grade school children, but not for adolescents or adults. These results are consistent with recent literature on endorsement and acquiescence phenomena, and have implications for prevalence studies of probable pathological gambling.