新时期农地私有的缺陷分析

在回顾中国农业制度演化的基础上,构建了农地私有影响农户收益与农地相关公共品的数理模型,分析了新时期农地私有的两大缺陷:农地产权私有化对农户收益提升存在不确定性;农地产权私有化将导致农地相关公共品供给激励的缺失。由此得出:任何建立在土地私有化基础上的制度革新对中国农业的发展都不是一个最优解。     

犍陀罗本生雕刻的印度文化母题

犍陀罗本生雕刻作为印度文化母题的视觉化形式,以叙事性图像生动地阐释印度民间广泛推崇的价值观。犍陀罗本生雕刻的文化母题包括具有普世意义的乐善好施的传统;以轮回报应为理论基础,以孝敬忠贞为核心的伦理道德观念;奉行虔诚于神和克制苦行的修身理念。这些文化母题真实地再现了古代印度人民的社会理想、家庭关系和人生追求,是今人理解古印度文化的可靠资料。     

农民工子弟的“圣诞老人”

Patrick用他的行动告诉我们，无论你是怎样的一个人，无论你处于什么样的环境中，你都有能力去做一些力所能及的事，为什么不立即行动起来呢？     

中国国民财富总量、结构及其演进模式研究——基于“自上而下-自下而上”测度范式

“财富-福利等式”表明国民财富与社会福利具有理论等价关系,是评估发展可持续性的最优指示器。我国国民财富研究相对滞后,总量测度与结构分析都亟待深化。本文基于“自上而下-自下而上”范式,依据国情优化关键参数的设定,改进了我国国民财富与分类资本估算,并剖析了省际国民财富结构以识别其演进模式。研究发现:由于资源禀赋与发展阶段有别,省际国民财富结构差异显著;随着经济发展水平提升,国民财富结构先由自然资本主导转向物质资本与人力资本共同主导,进而转变为人力资本主导,最终迈入社会资本主导。各地区应结合自身禀赋与发展阶段做好“投资组合管理”,以此来提升国民财富并优化其结构从而改善经济发展的持续性。     

Changes in Family Relationships among Substance Abusing Runaway Adolescents: A Comparison between Family and Individual Therapies

Eligible adolescents (12–17 years old) were recruited from a short‐term crisis shelter for runaway adolescents in a large Midwestern city. Adolescents (N = 179) were randomly assigned to Ecologically‐Based Family Therapy (EBFT, n = 61), the Community Reinforcement Approach (CRA, n = 57), or brief Motivational Enhancement Therapy (MET, n = 61) with the primary focus on substance abuse. A significant increase in perceived family cohesion and a significant reduction in perceived family conflict were found among all treatment conditions from baseline to the 24‐month follow‐up. Adolescents who received EBFT demonstrated more improvement in family cohesion after treatment than those who received CRA or MET, and more reduction in family conflict during treatment than those who received MET.     

Depletion Effect of Work-Leisure Conflict: A Daily Diary Study

The negative effect of work-leisure conflict has attracted the attention of researchers. However, no previous research has determined the relationship between work-leisure conflict and ego depletion. Therefore, this study explores the relationship between daily work-leisure conflict and ego depletion, as well as the role of individuals’ negative emotions and core self-evaluations in this process based on ego depletion theory. Through the method of daily diary research, 77 employees were tracked for 7 consecutive work days. The results show that work-leisure conflict is positively related to employee ego depletion, that the negative emotions play a mediating role in this relationship and that core self-evaluations moderate the indirect effect of work-leisure conflict on ego depletion through negative emotions. In this study, daily diary method is used to verify the dynamic characteristics of work-leisure conflict, negative emotions and ego depletion, and some new insights into how to reduce employee ego depletion are provided.

     

Feature screening in ultrahigh-dimensional additive Cox model

The additive Cox model is flexible and powerful for modelling the dynamic changes of regression coefficients in the survival analysis. This paper is concerned with feature screening for the additive Cox model with ultrahigh-dimensional covariates. The proposed screening procedure can effectively identify active predictors. That is, with probability tending to one, the selected variable set includes the actual active predictors. In order to carry out the proposed procedure, we propose an effective algorithm and establish the ascent property of the proposed algorithm. We further prove that the proposed procedure possesses the sure screening property. Furthermore, we examine the finite sample performance of the proposed procedure via Monte Carlo simulations, and illustrate the proposed procedure by a real data example.     

革命与更化:立国时刻的治体重构

中国政治传统中积累了深厚的立国智慧，注重统一、安定之后的政教重建。古典革命本身意味着社会政治风化的向善提升、最终指向政治共同体精神的教化变迁。更化就代表了政治体致力于善治的文明化转变。儒家传统对于更化有全盘复古和与时损益两种激缓进路，渐进调适论在历史中更显出实践稳健性。政治更化着眼于立国构造中政治精英群体的养成，以此影响立国精神与政治权力再分配，体现出兼顾政治信念与宪制结构的治体论意识。文教振兴因此有其宪制蕴涵。更化立国的政治技艺，避免全盘复古的激进变法冲动，也避免将政治转型急切聚焦于政体制度的大规模改变。这是我们理解中国政治变迁的关键维度。     

Building a Human Health Risk Assessment Ontology (RsO): A Proposed Framework

Over the last decade the health and environmental research communities have made significant progress in collecting and improving access to genomic, toxicology, exposure, health, and disease data useful to health risk assessment. One of the barriers to applying these growing volumes of information in fields such as risk assessment is the lack of informatics tools to organize, curate, and evaluate thousands of journal publications and hundreds of databases to provide new insights on relationships among exposure, hazard, and disease burden. Many fields are developing ontologies as a way of organizing and analyzing large amounts of complex information from multiple scientific disciplines. Ontologies include a vocabulary of terms and concepts with defined logical relationships to each other. Building from the recently published exposure ontology and other relevant health and environmental ontologies, this article proposes an ontology for health risk assessment (RsO) that provides a structural framework for organizing risk assessment information and methods. The RsO is anchored by eight major concepts that were either identified by exploratory curations of the risk literature or the exposure‐ontology working group as key for describing the risk assessment domain. These concepts are: (1) stressor, (2) receptor, (3) outcome, (4) exposure event, (5) dose‐response approach, (6) dose‐response metric, (7) uncertainty, and (8) measure of risk. We illustrate the utility of these concepts for the RsO with example curations of published risk assessments for ionizing radiation, arsenic in drinking water, and persistent pollutants in salmon.     

京津冀服务业结构调整的动态研究

目前,中国区域经济,特别是东部地区呈现出"工业型经济"向"服务型经济"转型的趋势,且服务业内部结构也在发生显著变化,现代经济增长越来越依赖于服务业内部结构的升级。京津冀地区非常典型,故本文以京津冀区域一体化为依托,对京津冀服务业发展做Moore值分析,用2004—2013年的数据对北京、天津和河北服务业结构调整的程度和态势进行了比较研究,并详细分析了京津冀都市圈服务业发展路径和趋势,提出了相应的对策建议。