转型发展时期代际公共品的供给困局及其破解

代际公共品是指超过一代以上的人分享使用的产品.其特点决定了它总是面临供给不足的困局.从总量上看,代际公共品供给不足;从结构上看,代际公共品的供求错位;从规范分析看,"好"的代际公共品供给不足.在转型发展这一场涉及社会各方面的深刻变革中,代际公共品的供求机制、供求格局都发生了根本性的变化,产生了新的困局.因此,充分认识代际公共品供求机制、供求格局的变化,正确发挥政府的职能,动员社会力量共同参与供给是破解上述困局的关键.     

布迪厄习性理论的五个核心性结构特征:德国的分析视角

本文在德国学界对布迪厄习性理论研究的基础上,重点梳理并分析了习性理论的五个核心性结构特征:第一,习性作为实践生成原则的通用性和统一性,第二,习性作为实践生成原则的规定性和自由度,第三,习性作为身体化的社会结构,第四,个体习性的多样性与阶级或群体习性的均一性,第五,习性与场域之间的本体论对应关系.通过引入德国学界对布迪厄的研究,本文希望能有助于我国布迪厄研究的知识积累与视域扩展.     

Exploring the Effects of Conditioning Factors on the Strain–Crime Association: A Test on Incarcerated Chinese Women

A key assumption of general strain theory (GST) is that various factors condition the effects of strains on crime. Past research examining this conditioning hypothesis tended to focus on youth samples and use gender as a control variable. Using survey data from Chinese female inmates, this study tests the strain–crime relationship posited in GST as well as the hypothesized effects of the conditioning factors. Regression results show that different types of strains have distinct effects on respondents’ odds to commit violent over property crimes. Conditioning factors are found to moderate the strengths of strains toward respondents’ likelihood to commit property crimes over violent crimes.     

Parenting Practices,Autonomous Motivation,and Adolescent Diet Habits

Guided by self‐determination theory, the aim of this study was to examine whether adolescents’ autonomous motivation for making healthy diet choices mediates the association between parenting practices regarding diet and adolescent food choices. We analyzed data from the NCI FLASHE study, a survey of demographically diverse parents and their adolescent children (N = 1,646 dyads). Path models supported self‐determination theory’s assertion that indirect, encouraging parenting practices fostered internal motivation; in contrast, regulation was both positively and negatively linked to motivation depending on the model. Models also yielded direct paths between parenting practices and healthy and unhealthy diet choices. Overall, regardless of what predicted motivation, adolescents’ autonomous motivation was linked with their consumption of healthier foods and drinks. As such, cultivating a sense of internal motivation during these formative years may put young people on a path toward healthy patterns of self‐regulation later in life.     

Effect of pavement and water deficit on biomass allocation and whole-tree transpiration in two contrasting urban tree species

Urban Ecosystems - Aiming to explore the species-specific responses of biomass allocation and whole-tree transpiration in urban trees to pavement and drought, a field manipulation experiment grew...     

Estimation of the additive hazards model with interval-censored data and missing covariates

The additive hazards model is one of the most commonly used regression models in the analysis of failure time data and many methods have been developed for its inference in various situations. However, no established estimation procedure exists when there are covariates with missing values and the observed responses are interval-censored; both types of complications arise in various settings including demographic, epidemiological, financial, medical and sociological studies. To address this deficiency, we propose several inverse probability weight-based and reweighting-based estimation procedures for the situation where covariate values are missing at random. The resulting estimators of regression model parameters are shown to be consistent and asymptotically normal. The numerical results that we report from a simulation study suggest that the proposed methods work well in practical situations. An application to a childhood cancer survival study is provided. The Canadian Journal of Statistics 48: 499–517; 2020 © 2020 Statistical Society of Canada     

耦合网络边相继故障模型研究

针对耦合网络上频发的相继故障问题,通过分析边级联故障蔓延的动力学演化机制,构建耦合网络上边相继故障模型。以提高耦合网络整体抵制相继故障能力为出发点,依据不同度量指标,多角度分析具有不同耦合模式的耦合网络鲁棒性与模型参数之间的关联性,研究耦合网络间耦合模式和网络基本模型等因素对相继故障的影响,探讨耦合网络边相继故障模型的整体保护策略。研究结果表明,同配连接模式能够增强耦合网络抵制级联故障的鲁棒性;相互依赖的两个耦合网络之间拓扑结构越相似,网络抵制相继故障的鲁棒性越强;耦合网络鲁棒性与网络平均度正相关;适当的增加耦合网络间对称边数量,能够有效提高网络的鲁棒性。最后,应用边相继故障模型在耦合电力网络上进行实例分析。     

知识员工目标取向与知识团队反思对知识活动行为的交互影响研究

知识经济时代,科技型企业对知识型团队与知识型员工的依赖程度越来越高,知识型员工的知识获取与知识分享等知识活动行为越来越受到组织研究者的关注。本文综合运用目标取向理论与团队反思理论,将知识团队反思纳入到知识员工目标取向对知识活动行为影响的研究中,并推导出一个跨层次交互作用模型。通过对116个知识团队(含601个知识员工)样本的调查分析,得出实证研究结果 :知识员工学习取向对知识获取行为与知识分享行为具有显著的正向效应,且团队反思可以显著调节(增强)学习取向对知识分享行为的影响作用;证明取向对知识获取行为的影响效应不显著,但对知识分享行为具有显著的正向效应,而团队反思可以显著调节(增强)证明取向对知识获取行为与知识分享行为的影响作用;回避取向对知识获取行为与知识分享行为均具有显著的负向效应,且团队反思可以显著调节(削弱)回避取向对知识获取行为与知识分享行为的影响作用。最后讨论了研究的管理启示、研究局限及研究展望。     

Exploration and Firm Performance: The Moderating Impact of Competitive Strategy

In this study we examine the moderating effect of competitive strategy (including differentiation and cost‐leadership strategies) on the relationship between exploration and firm performance. We find that the moderating effect of differentiation strategy is positive while that of cost‐leadership strategy is negative. And, these moderating effects are stronger in a highly competitive context. This study offers an explanation for previous mixed findings on the linkage of exploration to firm performance and enriches the discipline's knowledge regarding the performance implications of exploration. Moreover, we respond directly to the appeal in research on competitive strategy to clarify the role played by competitive strategy in profiting from exploration.