中国农村养老政策的历史回顾与展望

由于长期的城乡二元体制,我国农村养老事业的发展远落后于城市,农村养老政策的欠完善成为影响农村养老问题解决的重要因素.回顾新中国成立以来我国农村养老政策的发展历程,将其分为萌芽时期、转型时期和发展时期三个发展阶段,并重点分析了五保供养制度、农村养老保险制度、农村合作医疗制度、最低生活保障制度等特殊养老制度,在此基础上提出了农村养老政策的未来展望.     

Estimation for Partially Linear Single-index Instrumental Variables Models

In this article, we generalize the partially linear single-index models to the scenario with some endogenous covariates variables. It is well known that the estimators based on the existing methods are often inconsistent because of the endogeneity of covariates. To deal with the endogenous variables, we introduce some auxiliary instrumental variables. A three-stage estimation procedure is proposed for partially linear single-index instrumental variables models. The first stage is to obtain a linear projection of endogenous variables on a set of instrumental variables, the second stage is to estimate the link function by using local linear smoother for given constant parameters, and the last stage is to obtain the estimators of constant parameters based on the estimating equation. Asymptotic normality is established for the proposed estimators. Some simulation studies are undertaken to assess the finite sample performance of the proposed estimation procedure.     

城镇化背景下大遗址管理体制的突破与困境

对大遗址管理而言,我国正稳步推进的城镇化既是机遇,也是挑战。为回应这些机遇或挑战,“十一五”前后我国从中央到地方采取了一系列措施,以寻求大遗址管理体制中管理架构和机构的部分突破。这些突破对大遗址保护已经或正在产生积极影响,但也面临着政策不具普适性、无法根除原管理框架痼疾等困境。促成大遗址保护需求与规划的衔接、引入社会力量参与大遗址管理,是突破困境的重要手段。     

中央企业竞争力提升与重组策略选择

中央企业重组作为国有经济改革的重要环节,其中一个重要的目的在于提升企业竞争力。文章从企业核心竞争力及动态能力理论出发,创新性地分析了二者与中央企业重组策略选择的内在机理,从重组模式、资源整合、技术革新、制度构建及外部环境优化等方面对中央企业竞争力提升与重组策略选择进行探讨,促使中央企业通过重组获得持续发展能力,最终提升国际竞争力,实现国有资产保值增值。     

构建开放型经济新体制打造大连市对外开放新优势

改革开放以来，大连市确立并坚持实施“外向牵动”、“开放引领”等经济发展战略，逐步形成了全方位多层次宽领域的对外开放格局，初步建立起开放型经济体系。依托这一体系，全市国际贸易快速发展，出口商品结构不断优化，境外投资持续增加，服务贸易逐渐扩大。大连市要引导开放向纵深发展，必须在强化原有重点园区开放效应的基础上，抓住自由贸易区建设的机遇，构建对外开放新平台，促成梯次开放格局。“构建开放型经济新体制”是党的十八届三中全会部署的改革重点任务之一。大连市如何立足区位优势，抢抓战略机遇，进一步优化投资和贸易管理体制，建立健全相关政策体系，培育有序、透明、法治化的营商环境，引导开放向纵深发展，赢取对外开放的新优势，成为大连市全面落实三中全会改革部署的重要任务。     

On a system of nonhomogeneous components sharing a common frailty

The components of a reliability system subjected to a common random environment usually have dependent lifetimes. This paper studies the stochastic properties of such a system with lifetimes of the components following multivariate frailty models and multivariate mixed proportional reversed hazard rate (PRHR) models, respectively. Through doing stochastic comparison, we devote to throwing a new light on how the random environment affects the number of working components of a reliability system and on assessing the performance of a k-out-of-n system.     

心态史视角下的孙宝琦与辛亥山东独立

辛亥革命时期,末任山东巡抚孙宝琦既效忠于清廷,又对革命党人持有恻隐,希望清廷与革命党人实现政治和解。但是,他面对省内的独立呼声和北方清廷的双重压力,无法从容转圜,从而陷入彷徨不定的心态纠结中。孙宝琦先是被迫宣布山东独立,当袁世凯指使第五镇反对独立后,孙宝琦即秉承袁世凯旨意,宣布取消独立。山东独立的波折造成了孙宝琦政治人格的分裂,使其长期受到负面评论,但是客观上却使山东避免了南北冲突的战火,因而应当予以充分理解。     

关于中国现代史分期问题的思考

目前,史学界对于中国现代史的分期看法不一,形成不同的主张：或以重大政治历史事件为标准,或依据《关于建国以来党的若干历史问题的决议》,或以经济社会发展目标模式为分期标准。这些标准都不符合中国通史的学科分期要求。中国现代史作为通史,其分期应当以社会形态的变迁为标准,应根据社会主义的不同发展模式,将其划分为新民主主义时期或社会主义的准备时期、苏联模式社会主义时期或传统社会主义时期、中国特色社会主义时期或现代社会主义时期。     

东方“三月三”民俗浅议

本文结合实地考察,对东方美孚方言区"三月三"民俗文化加以浅议。     

Re-Defining the Who,When, and Where of Mentoring for Professional Statisticians

Organizations tailor their mentoring strategies to accommodate internal resources and preferences, producing different approaches in academic, government, and corporate environments. Across these settings, three common barriers impede effective mentoring of statisticians: overspecialization, time constraints, and geographic dispersion. The authors share mentoring strategies that have emerged at their organization, Mathematica Policy Research, to overcome these obstacles. Practices include creating a methodology working group to unite researchers with diverse backgrounds, integrating mentoring into existing workflows, and harnessing modern technological infrastructure to facilitate virtual mentoring. Although these strategies emerged within a specific professional context, they suggest opportunities for statisticians to expand the channels through which mentorship can occur.