A Variation on the Coupon Collecting Problem

The classical coupon collector's problem is considered, where each new coupon collected is type i with probability p_i , ∑ ⁿ _{i = 1} p_i = 1. Suppose coupons are collected in a sequence of independent trials. An expression is developed for the probability that all coupon types i, i ≠ j, have been collected prior to collecting r ? 1 coupons of type j in the sequence of trials. Given two different coupon subsets A, B of {1, 2, …, n}, the foregoing is then generalized to an expression for the probability that s ? 1 copies of A appear in the sequence of trials before r ? 1 copies of B. Some computational considerations are discussed.     

Bayesian Network for Risk of Diarrhea Associated with the Use of Recycled Water

Estimating potential health risks associated with recycled (reused) water is highly complex given the multiple factors affecting water quality. We take a conceptual model, which represents the factors and pathways by which recycled water may pose a risk of contracting gastroenteritis, convert the conceptual model to a Bayesian net, and quantify the model using one expert's opinion. This allows us to make various predictions as to the risks posed under various scenarios. Bayesian nets provide an additional way of modeling the determinants of recycled water quality and elucidating their relative influence on a given disease outcome. The important contribution to Bayesian net methodology is that all model predictions, whether risk or relative risk estimates, are expressed as credible intervals.     

Factors related to casino dealer burnout and turnover intention in Macau: Implications for casino management

This study examined 172 casino dealers in Macau in order to understand dealers' feelings and attitudes about working in a casino. Several personality variables (emotional suppression, neuroticism, and need for achievement), organizational variables, i.e., organizational socialization (training, understanding, coworker support, future prospects), and distributive justice, were assessed in relation to casino dealers' job burnout, and work and pay satisfaction. All variables were tested as correlates of work and pay satisfaction, burnout, and turnover intention. Regressions found emotional suppression (a behaviour required of casino dealers) to be a strong negative predictor of work satisfaction; while training, distributive justice, and need for achievement were positive predictors. Emotional suppression and neuroticism were positive predictors of burnout; while future prospects and work satisfaction were negative predictors. Also, the future prospects and understanding dimensions of organizational socialization negatively predicted turnover intention. Results are interpreted in relation to casino administration and the management of casino dealers.     

The effects of economic and population growth on national saving and inequality

This is a progress report on ongoing research into the effects of economic and population growth on national saving rates and inequality. The theoretical basis for the investigation is the life cycle model of saving and inequality. We report evidence that is conditional on the validity of the model, as well as evidence that casts doubt on it. Using time series of cross-sectional household surveys from Taiwan, Thailand, Britain, and the United States, we show that it is possible to force a life cycle interpretation on the data on consumption, income, and saving, but that the evidence is not consistent with large rate-of-growth effects, whereby economic and population growth enhances rates of national saving. The well-established cross-country link between economic growth and saving cannot be attributed to life cycle saving, nor will changes in economic or population growth exert large effects on saving within individual countries. There is evidence in favor of the life cycle model’s prediction that within-cohort inequality of consumption and of total income—though not necessarily inequality of earnings-—should increase with the age of the cohort. Decreases in the population growth rate redistribute population toward older, more unequal, cohorts, and can increase national inequality. We provide calculations on the magnitude of these effects.     

Participatory Citizenship: Identity, Exclusion, Inclusion

Representative, deliberative or participatory democracy? Whatform of government, or governance, is most suited to the challengesfaced by individual citizens, communities and nation statesin the globalized economies of the 21st Century? Mohanty andTandon stress the importance of addressing these issues at anumber of levels, drawing on theoretical and practice perspectiveswithin the context of the Indian sub-continent – whilstbeing mindful throughout that the emerging lessons, debatesand thinking presented by contributors to ‘ParticipatoryCitizenship’ have a much wider relevance. The editors and their contributors never refer directly to communitydevelopment. This is, in itself, interesting. In the contextof ‘developing countries’,     

Welfare‐to‐work and the emerging third sector in South Korea: Korea's third way?

This article redefines the political concept of the 'third way' from a 'third (or voluntary) sector' perspective. It is argued that this differs from both the state-led 'first way' social democratic ideologies and the market-led 'second way' of neo-liberalism and conservatism. The focus is on the distinctive approach taken by the third sector in South Korea, and compares this with recent developments in the UK. Although President Kim's ideology of 'productive welfare' resembles neo-liberal trends, the third sector in South Korea (rather than, as in Western democracies, the state or private enterprise) has played a pivotal role in the application of the 'third way'. Moreover, since the economic crisis of 1997, many third sector organisations in Korea have initiated social job-creation projects. These form a key part of the Korean welfare-to-work system. In examining the future direction of Korea's 'third way', this article suggests the need for the revitalisation of voluntary action in civil society generally and, more specifically, the further development of those organisations led by the 'unemployed poor' themselves.     

Reliability of normalisation methods for EMG analysis of neck muscles

Acceptable reliability of normalisation contractions in electromyography (EMG) is paramount for testing conducted over a number of days or if normal laboratory strength testing equipment is unavailable. This study examined the reliability of maximal voluntary isometric contractions (MVIC) and sub-maximal (60%) isometric contractions for use in neck muscle EMG studies. Surface EMG was recorded bilaterally from eight sites around the neck at C4/5 level from five healthy male subjects. Subjects performed MVIC and sub-maximal normalisation contractions using an isokinetic dynamometer (ID) and a portable cable dynamometer with attached strain gauge (PCD) in addition to a MVIC against a manual resistance (MR). Subjects were tested in flexion, extension, left and right lateral bending and were retested by the same tester within a two-week period. Intra class correlation co-efficients (ICC) were calculated for each testing method and contraction direction and a mean ICC was calculated across all contraction directions. All normalisation methods produced excellent within-day reliability (mean ICC >0.80) but only the MVICs using the ID and PCD had acceptable reliability when assessed between-days. This study confirmed the validity of using MVICs elicited using the ID and PCD as reliable reference contractions for the normalisation of neck EMG.     

Goodness-of-fit tests for exponentiality based on a loss-of-memory type functional equation

Three goodness-of-fit tests for exponentiality based on the functional equation characterization 1?F(2x)=[1?F(x)]² for every x?0 are proposed and shown to compare well to several popular tests against common alternative cdf's. Small-sample critical values for α=0.10,0.05 are developed for the two superior test statistics and the asymptotic null-distributions are characterized.     

The consequences of love: young people and family practices in difficult circumstances

In recent years, there has been a resurgence of sociological work exploring the importance and meaning of kinship. Much of this work has criticized the ‘individualization’ thesis according to which changes in family structures over time have been interpreted as reflecting a fundamental decline in family values. Highlighting continuities as well as change in family life, this work has also suggested ways to move beyond the individualization debate and to develop alternative frameworks for the study of contemporary families and personal life, notably through the analysis of related practices. For various reasons, this recent work has focused primarily on the experience and practices of adults in ‘ordinary’ rather than more difficult family circumstances. This article aims to complement this work by focusing on the difficult family experiences of young people affected by parental substance use. It is argued that it is important not to lose sight of such experiences in order that sociological thinking reflect the diversity of family practices and the resources available to support them, including at younger ages. In addition, the importance of developing concepts or a language facilitating the exploration and communication of the emotional and symbolic significance of these practices is emphasized.