Confidence interval of the jump activity index based on empirical likelihood using high frequency data

It is widely accepted that jumps exist in the asset price process. The jump activity index is a natural measure of how frequent the jumps are. Statistical inference of the jump activity index is of importance in determining the type of process that underlies the dynamics of the log price process. In this paper, we implement the empirical likelihood approach to construct the confidence interval of the jump activity index of a pure jump model using high frequency data. Wilks' theorem is established. We also extend the result on Zhao and Wu (2009)'s estimator to the more general framework in this paper. Simulation studies demonstrate the good performance of the empirical likelihood approach. Compared with the existing non-parametric estimator proposed by Zhao and Wu (2009), the empirical likelihood approach gives more accurate coverage probabilities in the simulation studies.     

对中日韩三国物流协作问题的探讨

随着东北亚地区经济和区域内经济合作交流的迅速发展,加强中日韩三国物流领域合作的重要性日益突出。目前,中日韩区域内的物流协作相当不足,域内物流体系的发展比较迟缓,这与相互间贸易的高速发展状况极不相符。文章探讨了中日韩三国之间区域物流协作的现状和存在的问题,并针对问题从构建港口组群、托盘标准化、区域物流网络建设、物流人才的培养、政府协作五方面提出建议,以达到促进区域物流协作,促进区域贸易发展的目的。      

Process evaluation of the ‘Singapore Physical Activity and Nutrition Study’

IntroductionThe Singapore Physical Activity and Nutrition Study (SPANS) aimed to improve the physical activity (PA) and nutrition behaviours of Singaporean women aged 50 years and over. The SPANS program consisted of PA classes, nutrition workshops, telephone dietary counselling, health booklets, a health calendar and program ambassadors. This study aimed to assess and understand the implementation of the program strategies and gain insight into process evaluation components to inform future programs.MethodsThe evaluation was guided by a process evaluation framework and collected data via questionnaires (n = 209), program ambassador documentation and exit interviews with program completers (n = 13) and non-completers (n = 12).ResultsIn total, 295 participants completed the program (response rate = 84 %). Participants reported high levels of satisfaction with the overall program (99.5 %) and program activities (96.7 %), and also rated program ambassadors highly. Participation rates were highest for telephone dietary counselling sessions. The main reason for not attending program activities was having a ‘busy schedule’ (n = 158). Participants cited a need for improved recreational centre facilities and increased flexibility around program delivery.ConclusionsThe process evaluation showed that the program strategies were implemented as planned and were deemed suitable for supporting behaviour change among Singaporean women aged 50 years and over. The program reached and involved the majority of participants throughout the six months. The combination of practical educational resources and supportive program ambassadors were key strategies that facilitated positive PA and dietary behaviours. However, there needs to be some flexibility in the delivery of programs. The findings of this research may inform other programs in the region.     

A randomized study of CrossFit Kids for fostering fitness and academic outcomes in middle school students

Within the context of school-based physical education (PE), a strength and conditioning program called CrossFit Kids (CFK) has emerged as a potential intervention for positively impacting students. The purpose of this study was to evaluate through a randomized-controlled trial how academic and health-related fitness outcomes differed for middle school students (age = 12.73; 55.3 % male) who participated in a school-based CFK program (n=72) as compared to a group of students who participated in PE class (n=72). Questionnaire data were collected twice across the 9-month academic year and combined with FitnessGram and grade data.Students in both the intervention and comparison groups increased in health-related fitness outcomes (all p values < .017), and there was a significant treatment group by time interaction on school-reported grades [F(1, 124) = 7.270, p = .008, η_P^2 = .055].Significant gender by time interaction effects were found for the relationship between CFK or PE participation and health-related fitness outcomes, but there were no significant interaction effects by gender on academic outcomes. Because developmental outcomes are conditional and result from the coaction of many factors, the findings suggest that some elements of CFK might be beneficial to build skills yet disadvantageous to academic outcomes.     

晚清县官韩仲荆的家庭医病活动研究

晚清山西高平知县韩仲荆的日记中有大量关于他和家人日常生活中疾病与医疗活动的记录。面对疾病,韩仲荆及其家人采取各种方式积极应对,既有传统医药疗法,又有道医仙术之法,具有多样性的特点。从韩仲荆及家人的医病认知来看,他们既希冀医药奏效,又笃信天命之说,具有明显的传统性。在韩仲荆家庭的医病活动中,权力关系的不平衡是其显著特点,病家掌握着医病关系中的主导权,而男性权力在家庭医病活动中亦有绝对的彰显。考察韩仲荆家庭的医病活动对深窥晚清下层官员日常生活具有重要意义。     

提高未来教师素质必须重视的几个问题

文章分析了当前高师院校教育类课程在提高未来教师素质方面存在的问题 ,以及解决这些问题的对策。     

物流职业教育质量保证体系的建构:香港的经验及借鉴

通过介绍香港物流职业教育的概况,从内部控制和外部评估两个角度介绍了职业教学质量保证主体、评价标准、评价方式的具体做法,总结出对广东物流职业教育质量保证体系建构的借鉴意义和启示:加强宏观制度建设,构建合理的科学评价指标体系,加强院校质量自控的责任心和紧迫感。     

民国时期北京地区的盗墓活动述略(1912-1937)

民国时期,北京地区的盗墓活动呈现出愈演愈烈的发展态势。与此同时,有关当局的惩处措施也不断加码,无奈并不能扭转盗墓风气的蔓延。这一时期盗墓活动的猖獗,与当时动荡的社会现实和民生的凋敝以及北京地区独特的墓葬文化是分不开的。对此,尽管有关当局有所认识,但受形势所限并不能从根本上予以解决,从而使盗墓活动成为社会治安中日益棘手的难题。     

Raising Self-esteem through Social Networking Intervention for Older Chinese Adults in Hong Kong

Sudden physical changes can take a toll on older adults' self-esteem. Broadening their social support networks is one approach to retaining their self-esteem. This quasi-experimental study aims to test the effectiveness of a social networking program to raise self-esteem. The results from split-group analyses demonstrate that those who maintained active participation exhibited higher self-esteem. The results provide significant implications for future practice, especially to the less-educated males.     

城市3-6岁幼儿体育活动现状调查研究——以合肥市为例

幼儿体育是幼儿园教育的一个重要组成部分。运用文献资料法、问卷调查法、数理统计法等方法对合肥市幼儿园幼儿体育活动开展现状的调查研究,结果表明,各级政府及园长对幼儿体育活动开展持有积极态度,但在实施过程中经费投入不足,师资力量尤其专职幼儿体育教师的比例严重失衡,教学组织及教学内容单一等方面是制约幼儿体育发展的主要因素。主要对策：政府应加强对幼儿体育活动实施过程的监督力度,各级单位应加大投入体育经费;幼儿园应创新幼儿体育教育组织形式,同时多开展家园活动和园际交流活动,交流和学习幼儿体育教学经验,加强对幼儿体育的重要性和幼儿体育的方法技巧的宣传。