The Links Between Youth Employment and Educational Attainment Across Racial Groups

Research suggests that the relations between adolescent employment and youth development vary by socioeconomic status (SES) and race/ethnicity. However, it is unclear whether the links between paid work and college outcomes vary by either SES or race/ethnicity, or both. Using data from the Educational Longitudinal Study, we find that low‐intensity work during high school is associated with positive college outcomes for almost all students, whereas the associations between high‐intensity work and negative postsecondary outcomes are mostly limited to White students. Our results suggest that both differential selections into youth employment and differential consequences of youth employment contribute to these varying links between paid work and educational outcomes across different racial groups.     

Estimation of structural mean breaks for long-memory data sets

In long-memory data sets such as the realized volatilities of financial assets, a sequential test is developed for the detection of structural mean breaks. The long memory, if any, is adjusted by fitting an HAR (heterogeneous autoregressive) model to the data sets and taking the residuals. Our test consists of applying the sequential test of Bai and Perron [Estimating and testing linear models with multiple structural changes. Econometrica. 1998;66:47–78] to the residuals. The large-sample validity of the proposed test is investigated in terms of the consistency of the estimated number of breaks and the asymptotic null distribution of the proposed test. A finite-sample Monte-Carlo experiment reveals that the proposed test tends to produce an unbiased break time estimate, while the usual sequential test of Bai and Perron tends to produce biased break times in the case of long memory. The experiment also reveals that the proposed test has a more stable size than the Bai and Perron test. The proposed test is applied to two realized volatility data sets of the S&P index and the Korea won-US dollar exchange rate for the past 7 years and finds 2 or 3 breaks, while the Bai and Perron test finds 8 or more breaks.     

Development of an expert system for abnormal operating procedures in a main control room

The study was conducted from the perspective of human factors engineering in order to compare the process that operators originally used to diagnose potential and actual faults with a process that included an expert system for diagnosing faults. The results of the study indicated that the existence of an expert system for fault diagnosis makes the task of fault diagnosis easier and reduces errors by quickly suggesting likely Abnormal Operating Procedures (AOPs).     

The Incremental Group Testing Model for Gap Closing in Sequencing Long Molecules

In this paper, we propose the incremental group testing model for the gap closing problem, which assumes that we can tell the difference between the outcome of testing a subset S, and the outcome of testing S {x}. We also give improvements over currently best results in literature for some other models.     

Precursors and pathways to adolescent prostitution in Taiwan

This paper identifies the major precursors and pathways to prostitution for contemporary Taiwanese girls and the socioeconomic and cultural changes that have facilitated the shift in pathways over the past 10 years. Special attention is paid to the case of Taiwanese aborigines, who have particularly suffered systemic disruption due to prostitution. Analysis of case files and interviews provide quantitative and qualitative data that highlight the role of filial piety and the shift from indenture to runaway as the major pathway in Taiwan. Discussion includes relation of these findings to juvenile entry into prostitution in other countries, directions for future research, and policy recommendations for Taiwan's government.     

On estimating the dimensionality in discriminant analysis

In discriminant analysis, the dimension of the hyperplane which population mean vectors span is called the dimensionality. The procedures commonly used to estimate this dimension involve testing a sequence of dimensionality hypotheses as well as model fitting approaches based on (consistent) Akaike's method, (modified) Mallows' method and Schwarz's method. The marginal log-likelihood (MLL) method is developed and the asymptotic distribution of the dimensionality estimated by this method for normal populations is derived. Furthermore a modified marginal log-likelihood (MMLL) method is also considered. The MLL method is not consistent for large samples and two modified criteria are proposed which attain asymptotic consistency. Some comments are made with regard to the robustness of this method to departures from normality. The operating characteristics of the various methods proposed are examined and compared.     

Non-parametric estimation of population size from capture–recapture data when the capture probability depends on a covariate

Summary.  In capture–recapture experiments the capture probabilities may depend on individual covariates such as an individual's weight or age. Typically this dependence is modelled through simple parametric functions of the covariates. Here we first demonstrate that misspecification of the model can produce biased estimates and subsequently develop a non-parametric procedure to estimate the functional relationship between the probability of capture and a single covariate. This estimator is then incorporated in a Horvitz–Thompson estimator to estimate the size of the population. The resulting estimators are evaluated in a simulation study and applied to a data set on captures of the Mountain Pygmy Possum.     

Disabled people,choices and collective organisation: examining the potential of cooperatives in future social support

Major shifts in funding, demography, personal expectations and the rise of a global disabled people’s movement require new and creative solutions to the choices and rights agenda into the twenty-first century. Direct payments and the individual employment of personal assistants is one clear and recognised path to independent living. However, there have been some reservations about the nature, process and impact of the broader personalisation agenda more generally within which direct payments and personal budgets are located. Some commentators point to the loss of the collective impulse in personalised approaches – ideas that were central to the development of the independent living movement and its founding principles. Some countries have seen the rise of collective responses to direct payment developments. This is explicable in terms of a suspicion of individualist underpinnings of personalisation coupled with a collective vision of social life. This article is based on an exploratory study of collective approaches in the field of direct payments where choice and social solidarity are being combined. Drawing on developments in Sweden, England and Wales, the article aims to inform possible future debates about direct payments and cooperative approaches and argues that greater user-control is not inimical to enhanced collective action.     

Guilt and Shame in Chinese Culture: A Cross-cultural Framework from the Perspective of Morality and Identity

Olwen Bedford and Kwang-Kuo Hwang, Guilt and Shame in Chinese Culture: A Cross-cultural Framework from the Perspective of Morality and Identity, pp. 127–144.
This article formulates a cross-cultural framework for understanding guilt and shame based on a conceptualization of identity and morality in Western and Confucian cultures. First, identity is examined in each culture, and then the relation between identity and morality illuminated. The role of guilt and shame in upholding the boundaries of identity and enforcing the constraints of morality is then discussed from the perspective of each culture. The developed framework is then applied the emotions of guilt and shame in Chinese culture drawing on previous field research. Implications for future research are discussed.