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131.
132.
Helen Charnley Se Kwang Hwang Christine Atkinson Phillip Walton 《Disability & Society》2019,34(4):540-563
Despite UK government policy emphasising the rights and choices of people with learning disabilities, opportunities to choose fulfilling leisure activities remain severely constrained. Following a brief literature review we present a co-inquiry study developing a deeper understanding of the persistent space between actual and desired use of leisure time. We explore the potential of the capability approach to aid understanding of learning disabled people’s constrained choices of leisure activities, and constrained roles as researchers, as matters of human rights and social justice. 相似文献
133.
Soosung Hwang 《统计学通讯:模拟与计算》2013,42(3):571-578
We show that persistence of conditional volatility in large samples could be exaggerated by the existence of structural breaks in the ARCH and GARCH parameters. Our results suggest that extreme persistence frequently observed in index volatility does not necessarily indicate the same level of persistence over the sample period. 相似文献
134.
Which normal density curve best approximates the sample histogram? The answer suggested here is the normal curve that minimizes the integrated squared deviation between the histogram and the normal curve. A simple computational procedure is described to produce this best-fitting normal density. A few examples are presented to illustrate that this normal curve does indeed provide a visually satisfying fit, one that is better than the traditional , s answer. Some further aspects of this procedure are investigated. In particular it is shown that there is a satisfactory answer that is independent of the bar width of the histogram. It is also noted that this graphical procedure provides highly robust estimates of the sample mean and standard deviation. We demonstrate our technique by using data including Newcomb's data of passage time of light and Fisher's iris data. 相似文献
135.
Jungsywan Hwang Sepanski 《统计学通讯:模拟与计算》2013,42(4):783-790
A modification on the well-known, nonparametric Friedman test statistic is suggested in this article. Probability distributions of the suggested test statistic under the null hypothesis are tabulated for some small sample cases. In addition to an example, simulation results for various sample sizes are presented. The simulation indicates that the modified test statistic performs better than the Friedman test in detecting treatment effects of small differences especially when the sample size is small. 相似文献
136.
We consider the complete clinic visit records and environmental monitoring data at 50 townships and city districts where ambient air monitoring stations of Taiwan Air Quality Monitoring Stations are located. A Bayesian analysis is carried out using regression spline model on principal components obtained from several pollutant covariables. The appropriate model is selected using Bayesian model averaging. A brief account of our results is provided for the elderly patients group. 相似文献
137.
This study provides insights for theory and practice into employee willingness to mentor. This is especially important in passing knowledge from one generation of employees to another at a time when ageing populations are seen in many parts of the world. The study examines the relationship of contextual prosocial motivation with willingness to be a mentor while simultaneously considering various individual level influences on contextual prosocial motivation. Hypotheses were evaluated through a structural equation model. Results showed a positive relationship between contextual prosocial motivation and willingness to be a mentor. Additionally, organization-based self-esteem was positively related to contextual prosocial motivation, while proximity to retirement was negatively related to contextual prosocial motivation. Implications of the findings for human resource development are discussed with suggestions offered to strengthen contextual prosocial motivation of employees. 相似文献
138.
Sun-Jae Hwang 《韩国社会科学杂志》2013,40(1):1-19
Numerous studies have found a strong positive association between the level of education and economic returns (i.e., earnings). This relationship, however, has received less examination in the context of institutional or temporal variability. Drawing on the experience of South Korea in the decade after the 1997 Asian financial crisis, this study examines the role of education in rising earnings inequality under a radically changing institutional environment. Based on data from the Korean Labor Income Panel Study and Theil index decomposition, this study finds that despite the robust association between education and earnings inequality in post-crisis South Korea, a substantial amount of the rise in overall inequality is primarily attributable to rapid increase in within-education-group inequality rather than between-group inequality. This demands renewed attention to the role of education in earnings inequality to fully account for the changing dynamics of inequality in the twenty first century. 相似文献
139.
The usual confidence set for p (p ≥ 3) coefficients of a linear model is known to be dominated by the James-Stein confidence sets under the assumption of spherical symmetric errors with known variance (Hwang and Chen 1986). For the same confidence-set problem but for the unknown-variance case, naturally one replaces the unknown variance by an estimator. For the normal case, many previous studies have shown numerically that the resultant James-Stein confidence sets dominate the resultant usual confidence sets, i.e., the F confidence sets. In this paper we provide a further asymptotic justification, and we discover the same advantage of the James-Stein confidence sets for normal error as well as spherically symmetric error. 相似文献
140.
Limit expressions (as the dimension p ← ∞ ) are derived for the relative risk of the James-Stein estimator and its positive-part version. The limit is simple to evaluate, and gives the amount of improvement in risk that is possible. The technique used is to bound the risk, both above and below. with bounds that converge to the same limit. For the James-Stein estimator these bounds are simple to calculate, and are quite accurate even for moderate dimensions. 相似文献