Smoothed bootstrap bandwidth selection for nonparametric hazard rate estimation

A smoothed bootstrap method is presented for the purpose of bandwidth selection in nonparametric hazard rate estimation for iid data. In this context, two new bootstrap bandwidth selectors are established based on the exact expression of the bootstrap version of the mean integrated squared error of some approximations of the kernel hazard rate estimator. This is very useful since Monte Carlo approximation is no longer needed for the implementation of the two bootstrap selectors. A simulation study is carried out in order to show the empirical performance of the new bootstrap bandwidths and to compare them with other existing selectors. The methods are illustrated by applying them to a diabetes data set.     

The reproductive health indices and sex hormone levels in middle-aged and elderly Chinese men

Objective: The aim of this study was to analyze the age-related recession trajectory of reproductive health indices in middle-aged and elderly Chinese men.

Methods: A population-based cross-sectional study was conducted in Jiashan County, Zhejiang in 2012. Healthy men between 40 and 80 years of age were considered eligible for the study. Physical examination and the sex hormones were measured. The subjects were assessed based on the 5-item version of the International Index of Erectile Function (IIEF-5) for Erectile Dysfunction (ED), and Aging Males’ Symptoms (AMS) scale for Symptomatic Late-Onset Hypogonadism (SLOH).

Results: TG showed a decrease at age 60 years. Testis volume and TT did not show significant difference among the four age groups; cFT began to decrease at age 50 years and Bio-T decreased faster at age 50 years. SHBG and LH increased faster at age 50 and 70 years, respectively. IIEF5 score decrease faster at age 60 years. AMS scores increased faster at age 70 years. With the increase in age, the symptoms of ED and SLOH became severer.

Conclusion: Different indices on reproductive health of men showed turning points at different ages. At first, androgenic sex hormones decreased faster, and then erectile dysfunction got severer, and the last overall male syndromes declined.     

社会参与对中老年消费的影响及作用机制研究

本文基于中国健康与养老追踪调查（CHARLS）2018年数据,利用工具变量法及倾向得分匹配方法实证分析社会参与和中老年消费之间的关系,并采用中介效应模型研究社会参与影响中老年消费的作用机制。研究发现：社会参与对中老年总消费、日常性消费、发展性消费、享受性消费均有正向影响,其中对享受性消费的促进作用最为明显。社会参与能通过影响认知能力、投资与缓解信贷约束间接影响中老年消费,且三者的作用机制存在差异;社会参与对中等收入群体、城市消费群体、中年消费群体的影响更大。因此,未来应创造相应条件鼓励中老年人积极进行社会参与,加大对中老年人学习信息技术、参与老年教育的引导和支持力度。同时,加速适老化社交型产品和服务的开发,以有效发挥社会参与对中老年消费的拉动作用。     

乡村振兴背景下民族地区新型城镇化-旅游产业-生态环境协调发展研究——以四川、云南、甘肃、青海四省为研究区域

本文构建四省民族地区新型城镇化-旅游产业-生态环境协调发展评价指标体系,运用耦合协调模型、地理探测器和灰色预测模型展现、分析及预测四省民族地区新型城镇化、旅游产业与生态环境（以下简称“UTE”系统）协调关系及演进过程。研究发现2008-2018年该区域UTE系统协调水平不断优化上升,内部发展不均衡,差距进一步拉大;新型城镇化领先,旅游产业和生态环境滞后是总体特征;经济发展和生态环境改善是制约和影响耦合度的关键因素;未来协调度稳步提升,但演进速度区域差异明显。基于此提出尊重和保护文化环境为四省民族地区的发展基础、加强区域合作、构建区域发展协调保障机制的建议。     

工业设计的多元功能及其对河南开放带动战略的影响

全面、准确地认识工业设计的多元功能是发展和利用工业设计的前提。工业设计与产品直接相关的功能称为工业设计的直接功能或微观功能,工业设计通过产品表现出来的对经济运行全局发生作用或影响的功能叫间接功能或宏观功能。工业设计的多元功能对河南开放带动经济战略的实施,有重要的推动作用。     

广东新生代民工荒的根源与对策

新生代农民工是当前社会发展中新出现的阶层。如何解决新生代农民工“民工荒”问题,是一个现实迫切的社会问题。本文分析了新生代农民工的特点,剖析了广东省新生代民工荒的现状与根源,在此基础上提出了相应的治理建议。     

弘扬儒家"和谐"文化构建社会主义和谐社会

构建社会主义和谐社会,是党中央在十六大报告的基础上提出的我国经济社会发展新的战略指导思想。“和谐社会”思想的文化渊源可以追朔到我国传统的儒家文化。以孔孟为代表的儒家文化的精髓和理想就在于实现社会的“和谐”。在构建社会主义和谐社会中,继承和弘扬儒家的“和谐”文化具有重要的理论意义和当代价值。     

比较文学定义与可比性的反思与探索

比较文学在中国复兴20年来,取得了巨大的成绩和进步,成为中国学术界最活跃的一个学科领域,为全世界比较文学学者所关注,产生了世界性的影响。正如季羡林教授所指出:“以学科而论,在世界范围内,比较文学的兴起是较晚的,在中国则更晚,然而一旦兴起,就立即显示其活力,转瞬成为世界显学。比较文学若没有中国是残缺不全的。”实际上,全世界的比较文学学科理论已经历了三个阶段:第一阶段在欧洲,第二阶段在北美,第三阶段在亚洲。中国比较文学学科理论的研究,正是这第三阶段的重要成果。然而,这些成果的取得,却并非一帆风顺,而是在各种困境中推进的,是在种种诘难、否定和困惑之中成长起来的,是在持续不断的“危机”声中脱颖而出的。本专栏特就“比较文学学科理论的困惑与进展”这一题目,约请了上海、广东、山东、四川等地的比较文学学者各抒己见,意在找准问题,认清方向,予人启发,促进比较文学学科理论的进一步发展。     

Economic Inequality is Associated with Lower Internet Use: A Nationally Representative Study

Social Indicators Research - Previous studies have documented the associations of objective class with either social capital or subjective social status, yet little attention has been paid to the...     

Stereotype and National Attachment in Hong Kong Chinese Context: A Moderated Mediation Model of Perceived Inter-group Relationship and Age

The present study investigated the relationship between Hong Kong people’s stereotype toward Mainland people and their own national attachment (i.e., national identity, constructive patriotism, and uncritical patriotism). The role of inter-group relationship as mediator and age as moderator of that relationship were also tested. A total of 1753 local Hong Kong people aged 17–80 (mean age = 20.35 years, SD = 5.02) completed anonymous questionnaires regarding their stereotypes toward Mainland people, inter-group relationship with Mainland people, and national attachment. As expected, stereotypes toward Mainland people, inter-group relationship and national attachment showed significant positive associations with each other. More interestingly, it was found that the inter-group relationship mediated the relationship between stereotypes toward Mainland people and three domains of national attachment, with this indirect link being weaker for younger Hong Kong adults than for older Hong Kong adults. Implications of the present findings for future research are discussed, as well as potential interventions for increasing subjective national attachment to China, especially in young Hong Kong people.