Analysis of dependently truncated data in Cox framework

Truncation is a known feature of bone marrow transplant (BMT) registry data, for which the survival time of a leukemia patient is left truncated by the waiting time to transplant. It was recently noted that a longer waiting time was linked to poorer survival. A straightforward solution is a Cox model on the survival time with the waiting time as both truncation variable and covariate. The Cox model should also include other recognized risk factors as covariates. In this article, we focus on estimating the distribution function of waiting time and the probability of selection under the aforementioned Cox model.     

Working and disability expectancies at older ages: The role of childhood circumstances and education

The ability to work at older ages depends on health and education. Both accumulate starting very early in life. We assess how childhood disadvantages combine with education to affect working and health trajectories. Applying multistate period life tables to data from the Health and Retirement Study (HRS) for the period 2008–2014, we estimate how the residual life expectancy at age 50 is distributed in number of years of work and disability, by number of childhood disadvantages, gender, and race/ethnicity. Our findings indicate that number of childhood disadvantages is negatively associated with work and positively with disability, irrespective of gender and race/ethnicity. Childhood disadvantages intersect with low education resulting in shorter lives, and redistributing life years from work to disability. Among the highly educated, health and work differences between groups of childhood disadvantage are small. Combining multistate models and inverse probability weighting, we show that the return of high education is greater among the most disadvantaged.     

全域旅游视角下的天府旅游名县竞争力研究——以四川省县域城市为例

天府旅游名县创建是按照全域旅游发展理念开展的，以建设世界重要旅游目的地为目标的建设工程。文章在系统整理旅游目的地竞争力主要研究成果基础上，建立15个天府旅游名县竞争力评价指标，基于可量化数据，采用主成分和聚类分析方法，对进入天府旅游名县的40个县(市、区）进行实证研究。结果显示，旅游核心竞争力、旅游发展规模、旅游综合实力、非优势资源品牌创建能力等因素是构成天府旅游名县评判的主要因子；从空间结构上看，呈现成都平原最强，川西、川北居中，川南最弱的局面；从创建动力上看，不应仅关注创建结果，而应通过创建工作，促进县域经济综合发展水平和城市发展潜力提升。     

基于委托代理理论的会计信息失真问题研究

会计信息失真问题越演越烈,并且已成为一个世界性难题。可靠性、真实性、相关性是会计信息质量的生命,但一系列会计舞弊行为的发生已篡改了会计信息的本来面目,会计信息"诚信工程"摇摇欲坠。造成会计信息失真的原因有很多,就此,我国也采取了相应的措施予以治理,但效果并不显著,往往是治标不治本。本文从产生会计信息失真问题的根源出发,重点剖析了在以委托代理理论为根基的现代股份制企业中会计信息失真的原因,并提出了提高委托代理制度下的会计信息质量的相应对策。     

不均等选择概率下的加权调整研究

从不均等选择概率的角度,提出两类常见的权数调整类型及其调整方法:一是规模调整,使得样本单元权数之和等于总体规模;二是结构调整,使得样本结构和总体结构一致,并构造出加权调整的设计效应模型,应用于复杂样本设计。案例分析显示,加权调整往往导致设计效应变大,带来负的效应,但校准调整能降低设计效应,提高估计精度。     

How social comparison influences reference price formation in a service context

What is the influence on reference price when the source of price information is anonymous versus social? This article investigates the formation of reference prices given an observed sequence of past prices in a service context. An experimental study suggests that, considering the same price information, if the source is social (i.e., the prices paid by colleagues), then consumers want to pay less. More specifically, social comparison changes the way individuals weigh information, attributing more importance to the lowest historical prices and to the range in price variations.     

中国商品流通现代化的模糊综合评价研究

完善了商品流通现代化指标体系,并运用模糊综合法将商品流通现代化指标转换成了指数。研究发现商品流通现代化水平与其区域位置、总体经济实力密切相关,且受到产业结构的影响。同时,通过基于指数的聚类分析得到如下结论:"率先发展型区域"要抓住历史机遇,培养创新型人才,保持领先地位;"积极追赶型区域"要发挥地理优势,打破省之间、行业和部门之间、所有制之间的界限,积极参与各种区域经济合作;"流通欠发达型区域"要进一步推进和实施西部大开发战略,推进物流现代化。     

Decomposition of Variance for Spatial Cox Processes

Abstract. Spatial Cox point processes is a natural framework for quantifying the various sources of variation governing the spatial distribution of rain forest trees. We introduce a general criterion for variance decomposition for spatial Cox processes and apply it to specific Cox process models with additive or log linear random intensity functions. We moreover consider a new and flexible class of pair correlation function models given in terms of normal variance mixture covariance functions. The proposed methodology is applied to point pattern data sets of locations of tropical rain forest trees.     

中小学校长职业发展阶段分析

随着教育全球化和市场化的发展，校长职业发展成为教育界的热门话题。从普通教师到引领学校健康发展的成熟校长需要经过四个阶段：职前预备期、适应期、称职期和成熟期。不同发展时期对校长具有不同的要求，校长只有顺应这些要求不断进取，才能成长为能够为我国教育事业作出贡献的校长。     

对当代中国马克思主义大众化主体的整体性把握

人们从熟知而并非真知的"当代中国马克思主义大众化"入手,就不同层次的主体在这项复杂的系统工程中已经做了什么,应该做些什么,还需要做些什么作一个清理和回顾,显得十分必要.通过历史的整体性分析可以得出,充分利用中央及政府的政策与倡导作用,充分发挥理论工作者的学科科研功能,理性地唤起民众的主体参与精神,是进一步推动当代中国马克思主义大众化不可或缺的力量源泉.