Three‐period,two‐treatment crossover design under long‐term carryover effect

The paper describes non‐parametric approach for analysis of a three‐period, two‐treatment, four‐sequence crossover design in which test procedure for interchangeability of the treatment effects is obtained. The proposed procedure is based on a non‐parametric model, which incorporates, along with the direct treatment effects and the usual carryover effects, the long‐term carryover effects. Relevant competitors are obtained. Related asymptotic results are given. By performing simulation study, we compared the procedures with respect to type I error rate and power. Furthermore, confidence intervals for treatment differences are studied. The procedures are illustrated with a data study.     

论学校教育场域下良好师生关系的建构

布迪厄提出了“场域”的范畴，并广泛运用于社会学领域中，也体现在学校教育过程中。了解学校教育场域下师生关系的矛盾与冲突，对于建构和谐、融洽的良好师生关系有着指导意义。     

On dividends in the phase–type dual risk model

The dual risk model assumes that the surplus of a company decreases at a constant rate over time, and grows by means of upward jumps which occur at random times with random sizes. In the present work, we study the dual risk renewal model when the waiting times are phase-type distributed. Using the roots of the fundamental and the generalized Lundberg’s equations, we get expressions for the ruin probability and the Laplace transform of the time of ruin for an arbitrary single gain distribution. Then, we address the calculation of expected discounted future dividends particularly when the individual common gains follow a phase-type distribution. We further show that the optimal dividend barrier does not depend on the initial reserve. As far as the roots of the Lundberg equations and the time of ruin are concerned, we address the existing formulae in the corresponding Sparre-Andersen insurance risk model for the first hitting time, and we generalize them to cover also the situations where we have multiple roots. We do that working a new approach and technique, approach we also use for working the dividends, unlike others, it can be also applied for every situation.     

The impact of abusive supervision and co-worker support on hospitality and tourism student employees’ turnover intentions in Ecuador

Ram (2015. Hostility or hospitality? A review on violence, bullying and sexual harassment in the tourism and hospitality industry. Current Issues in Tourism. doi:10.1080/13683500.2015.1064364) posits that violence and harassment are areas of concern within the hospitality industry, and scholarly interest in abusive supervision in the workplace has grown since the last decade. This study extends Ram's (2015. Hostility or hospitality? A review on violence, bullying and sexual harassment in the tourism and hospitality industry. Current Issues in Tourism. doi:10.1080/13683500.2015.1064364) assertion by examining the effect of abusive supervision experiences on student employees’ turnover intentions in a hospitality and tourism context in a high power distance culture, Ecuador. The results showed that abusive supervision was positively related to turnover intentions, and its effect was stronger than co-worker support, with the abusive supervision–turnover intentions relationship being fully mediated by perceived organizational support (POS). In addition, co-worker emotional support was found to attenuate the negative effects of abusive supervision on POS. All in all, the findings highlight the roles of POS in explaining the relation between abusive supervision and turnover intentions and co-worker emotional support in buffering the negative effect of abusive supervision. The important role of culture is discussed.     

The Long‐Run History of Income Inequality in Denmark

We use historical publications and micro data from tax returns to construct internationally comparable estimates of the development in income inequality in Denmark over the last 140 years. The study shows that income inequality and top income shares have declined during several distinct phases in between periods of stability. Furthermore, the quality of the Danish data allows us to analyse not only the development in top income shares but also broader inequality measures such as the Gini coefficient. These analyses show that top income shares are a good proxy for the underlying development in inequality.     

基于大样本调查的本科学生与高职学生创业认知差异分析

以"高校创新创业教育协作网络"组织并开展的"2015年在校大学生创业态度和创业意向调查"为数据来源,分析了来自全国37所本科院校和15所高职院校的15624份问卷。通过探索性因子分析研究了本科学生和高职学生在创业意向、创业态度、创业环境感受和创业要素认知4个构念下多个维度的情况;通过单因素方差分析研究了本科学生和高职学生在创业意向、创业态度、创业环境感受和创业要素认知方面的差异。研究发现:高职学生的创业意向比本科学生强烈;本科学生和高职学生都认为自我实现是创业的最大价值;本科学生偏向于将经济追求置于第二位,而高职学生认为社会贡献是第二位的;高职学生比本科学生对创业环境的认可度更高,两者在家庭环境感受上的差异最大;本科学生和高职学生都认为创业成功的关键要素中"资源要素>理念要素>社会要素"。在上述研究结果的基础上,对国内高校开展差异化创业教育提出了相关建议。     

随机需求下横向并购供应链网络整合优化策略研究

本文从系统优化视角,针对增设集散中心的横向并购供应链网络整合策略,利用变分不等式建立了随机需求下的整合优化模型。以市场链为主线,以供应链网络均衡理论为基 础,构建了以横向并购供应链网络活动总成本最小为目标的数学模型,通过转换成变分不等式采用改进的欧拉算法进行模型求解。通过数值算例进一步说明了模型的适用性和灵活性,得出了增设集散中心的并购整合策略能够降低供应链网络的平均运营成本的结论,通过对比不同市场紧密程度下产生的供应链网络平均成本协同效应,发现随着市场紧密程度的增加其协同效应更明显,为横向并购供应链网络整合优化提供理论依据与方法。     

Crime and punishment: the role of student body characteristics in schools’ disciplinary behaviours

Discretion in schools’ discipline choices can provide an efficient and effective misconduct management structure, but could lead to discipline based on unrelated factors. Consequently, schools’ disciplinary decisions can significantly limit students’ access to education by removing students from familiar learning environments. We investigate schools’ disciplinary decisions for serious misconducts and show that punishments are more severe in schools that do not report misconducts to local law enforcement agencies. Moreover, we show that schools that report fewer misconducts to law enforcement impose more severe punishments when the student body is characterized as having a higher proportion of minority students, lower socioeconomic status students and a higher proportion of students who are below the 15th percentile of standardized test scores. These results suggest that between-school punishment differentials are associated with student body traits.     

Mobility of Top Incomes in Germany

I analyze German top income mobility using micro‐level panel data of personal income tax returns which are highly representative for top income taxpayers for the years 2001–06. Top income mobility is assessed in three dimensions: (i) persistence in top income fractiles and its stability over time, (ii) measures of individual mobility that are not dependent on the fractile size: the degree of mobility between equally sized groups and mobility in ranks, and (iii) mobility's impact on top income shares. Persistence in top income fractiles is comparatively high and fairly stable across the analyzed period. Top income recipients are less prone to downward mobility and see less variation in annual ranks than less rich tax units. Mobility's impact on income concentration is moderate. The top percentile's share is reduced by roughly 5 percent over six years.