Accurate computation of single and product moments of order statistics under progressive censoring

An accurate procedure is proposed to calculate approximate moments of progressive order statistics in the context of statistical inference for lifetime models. The study analyses the performance of power series expansion to approximate the moments for location and scale distributions with high precision and smaller deviations with respect to the exact values. A comparative analysis between exact and approximate methods is shown using some tables and figures. The different approximations are applied in two situations. First, we consider the problem of computing the large sample variance–covariance matrix of maximum likelihood estimators. We also use the approximations to obtain progressively censored sampling plans for log-normal distributed data. These problems illustrate that the presented procedure is highly useful to compute the moments with precision for numerous censoring patterns and, in many cases, is the only valid method because the exact calculation may not be applicable.     

要素匹配与中国投资效率空间差异性——基于双层嵌套型函数的分解研究

本文基于四要素双层嵌套的生产函数,利用1990-2016年全国层面及省际层面数据测算投资效率,并分析其空间结构特征及演变轨迹,检验投资效率匹配效应影响因素。研究发现：①1990-2016年我国整体投资效率呈下降趋势,资本-技能劳动匹配效应与整体投资效率走势趋同,快速累积的资本存量和不断升级的资本质量与短缺的技能劳动之间矛盾突出。②东中西部地区投资效率增长非一致性明显。东部地区资本相对投资效率明显高于中西部,但下降幅度大于中西部,中西部与东部地区之间差距缩小,其中匹配效应是区域间投资效率非平衡的主要成因。③若产业结构升级的技能劳动需求不能满足,将引发要素错配,不利于有效投资。房价与工资提升分别通过影响技能劳动供给和需求抑制要素匹配效率;教育和公路设施会对地区要素匹配产生积极影响,改善地区间投资效率非均衡性;地区投资效率存在显著正向空间相关性,毗邻地区的要素流动和经济发展相近地区的技术溢出均对投资效率产生积极的影响。     

Elementary School-age Children's Attitudes Toward Children in Same-Sex Parent Families

As numbers of families with same-sex parents increase in the United States, children are more likely to encounter diverse family structures. Given that young children can demonstrate in-group bias, prejudicial attitudes, and social exclusion, it is important to understand how children perceive their peers in diverse families. To our knowledge, no studies have assessed elementary-school-age children's attitudes about same-sex parent families. Here, 131 elementary school students (M_age = 7.79 years; 61 girls) viewed images of same-sex (female and male) and other-sex couples with a child and then were asked about their perceptions of these families, particularly the children. Results indicated participants' preferences toward children with other-sex versus same-sex parents. Developmental and practical implications about children's attitudes toward sexual minority parent families are discussed.     

Sexual Orientation as a Peripheral Cue in Advertising: Effects of Models’ Sexual Orientation,Argument Strength,and Involvement on Responses to Magazine Ads

This study examines how sexual orientation of couples featured in magazine advertisements affects heterosexual viewers’ responses using the elaboration likelihood model as a framework. A 3 × 2 × 2 × 3 experiment tested effects of sexual orientation, argument strength, involvement, and attitudes toward homosexuality on heterosexuals’ attitudes toward the couple, advertisement, brand, and product, purchase intentions, and recall. Results indicate that consumers were accepting of ads with lesbian portrayals. Participants showed more negative attitudes toward gay male portrayals, but attitudes toward heterosexual and lesbian ads were similar. This effect was moderated by participants’ attitudes toward homosexuals. Low-involvement consumers showed more negative attitudes toward homosexual portrayals than toward heterosexual portrayals, indicating that sexual orientation may have served as a peripheral cue negatively impacting attitudes toward the couple and ad under low elaboration. These effects were not observed for attitudes toward the brand and product, purchase intentions, or recall.     

Validation of the Learning Transfer System Inventory (LTSI) in the Korean corporate context

Lack of a valid instrument to measure learning transfer predictors has been the major obstacle hindering Human Resource Development (HRD) professionals from moving forward. This problem is one of the lingering HRD issues in South Korea, in which human resources have been strategically emphasized as a critical asset due to the scarcity of natural resources. To address this issue, this study aims at testing the validity and reliability of the data collected with the Korean Learning Transfer System Inventory (LTSI) Version 4. A sample of 753 managers from 16 Korean industries was divided into two subsamples for exploratory and confirmatory factor analyses. Reliability and the effect of common method variance on the factor structure were examined, with the results suggesting that the LTSI is valid for use in the Korean industry.     

中国上市公司高管薪酬与股权结构关系实证研究

选取2010--2012年A股市场全样本数据进行研究,统计分析发现上市公司高管薪酬三年间增长很快,且公司之间差距非常大。我国股权结构基本保持稳定,股权集中度较高。采用多元回归分析,在控制公司规模与公司绩效的情况下,发现A股市场总体上高管薪酬总额与股权集中度显著负相关。结果显示,在股权分散情况下内部人控制较明显。同时高管薪酬总额与公司绩效以及公司规模呈正相关,并分析其产生原因。     

国有商业银行资本市场业务研究

本文首先从国际金融界混业经营 ,国内银行、保险、证券三业互相渗透共同发展 ,我国资本市场发展对银行传统业务的冲击 ,以及加入 WTO挑战的需要等方面论述了国有商业银行拓展资本市场业务的客观现实性。其次 ,从资本市场规模、银行和证券公司、基金、保险公司的业务合作领域 ,以及合作的层次和市场发展潜力等方面阐述了国有商业银行进行资本市场业务创新的动因及其目前在资本市场业务方面存在的问题和解决办法。进而分析了进一步拓展资本市场业务从建立战略同盟、壮大资金实力和实现综合经营有效切入的问题     

北京市现代制造业的产业组织结构分析

北京现代制造业的发展已有4年时间,对其发展状况和存在问题有必要从不同角度做出一个基本判断。本文主要从产业组织学的角度分析北京现代制造业产业组织结构的现状,探讨其存在的问题,并提出优化北京现代制造业产业组织的对策与建议。     

取消民族成份作假考生录取资格的合法性质疑

对于民族成份作假骗取高考加分的考生,教育行政部门作出的取消录取资格的处理,在性质上属于行政处罚,应当遵守《行政处罚法》的有关规定。有关行政规范性文件不属于法的渊源,民族成份作假考生的行为不是应当受到行政处罚的违法行为,对考生实施行政处罚缺乏事实根据。行政规范性文件无权设定行政处罚,依据有关行政规范性文件取消考生录取资格,缺乏法律依据。有关部门取消考生录取资格也没有遵循《行政处罚法》规定的程序,不具有合法性。     

关于我国外汇储备规模的研究与分析

外汇储备是衡量一国综合国力的主要指标之一,肩负着调节国际收支、稳定汇率的重任。截至2006年2月底,我国外汇储备规模为8537亿美元,位居全球第一。庞大外汇储备在带来诸多好处的同时,也反衬着国内经济失衡的持续。因此,有必要对我国外汇储备的规模问题进行深入的审视,根据国际国内实际情况确定客观、适度的外汇储备规模,化解我国外汇储备过高、低效的矛盾。