基于目标替代率的税延型商业养老保险扣除限额优化研究

我国养老保障体系三支柱发展严重失衡,为了缓解基本养老保险的压力,提升养老保险替代率,商业养老保险的发展迫在眉睫,税收递延型商业养老保险也开始试点。在2018年个税改革后,目前税收递延型商业养老保险推行办法下,中低收入群体无法享受实际税收优惠,高收入群体可享受的税收优惠有限且过低。本文以替代率为基准,根据精算平衡原理构建模型,对扣除限额进行优化研究,试图测算出与新个税办法匹配且有利于多层次收入水平的消费个体享受实际税优的扣除限额。同时,本文还对不同扣除限额下开始购买保险年龄、个税起征点、个人收益率及初始收入水平这四个参数变化对实际税优额的影响做了分析,得出所测算出的扣除限额的确较现行扣除限额更为合理,并提出了相关对策建议。     

中国乡村城市化浅析

实现乡村城市化是我国21世纪实现工业化、现代化重要战略布置，也是我国经济社会发展面临一项十分紧迫的任务。正如马克思在《政治经济学批判》中指出：“现代的历史是乡村城市化，而象古代那样，是城市乡村化。”因此，寻求一条适合我国国情和地区特征乡村城市化道路，探索我国乡村城市化发展的战略思想，是当代城市规划工作面临的一个严峻课题，也是制定跨世纪城市规划的重要组成部分。     

工程质量问题和质量事故的处理

工程质量事故具有复杂性、严重性、可变性和多发的特点。因此，应加强质量风险分析，及早制定对策和措施，重视工程质量事故的防范和处理，避免已发生的质量问题和质量事故进一步恶化和扩大。     

Evidence on the Timing and Determinants of Overfunded Pension Plan Termination

This paper examines the factors associated with the timing of overfunded pension plan termination.     

建立我国基于风险控制的企业年金监管体系

在我国企业年金制度启动后，为防范企业年金基金管理风险，必须建立一套行之有效的监管体系和监管方法。本文提出建立我国基于风险控制的企业年金监管体系，该体系是基于风险的金融监管理论在企业年金领域的应用和实践。建立基于风险的企业年金监管体系主要包括4个方面的内容：即确定企业年金的监管架构及适合我国国情的监管模式；建立统一的风险监管平台，开发统一的企业年金风险监管系统，统一企业年金监管风险管理工具和风险指标，形成支持协同监管的技术系统平台；完善规章制度体系，凄定监管基础；切实严格执行管理机构的准入制度，形成优胜劣汰良好机制。     

发展我国农村社会养老保险制度的几点思考

长期以来,我国城乡养老社会保障呈现了明显的二元化特征.笔者认为,应该从我国家庭户规模的变化、未来人口发展趋势、经济体制改革以及非经济因素等方面来全面考虑发展农村养老社会保险制度的意义、面临的挑战及改革思路.要根据各地经济发展水平不同建立分地区、分层次的农村养老社会保障制度,必须尽快将农村养老社会保障制度建设纳入法制化轨道,并且应推广发达地区的成功经验,继续进行试点工作.     

论虚拟仿真技术与群体支持系统在工程管理中联合应用

工程施工计划是一项复杂的工作，不断增长的复杂因素决定了工程管理人员需要采取新的、从未被用过、检测过的工程施工方法。缺乏便于工程策划人员进行评估和确认施工计划是否合理的工具，会在工程施工阶段造成许多重复性工作，造成成本浪费。虚拟现实技术为解决上述问题提供了一个很好的方法，会生成虚拟环境，允许项目决策人员在施工之前合理优化和选择施工方案，资源优化，降低成本，从而获得更好的投资效益。利用群体支持系统建立与工程施工计划相呼应的模型，工程数据作为其处理问题与人机交互的依据，辅助人员决策，进行项目的预算和分析，提高工程项目的价值管理。     

模糊决策在房地产建筑方案优选中应用

在房地产开发中建筑方案的决策是一项综合性、专业性、技术性极强的工作。针对以往建筑方案评价的缺陷，归纳总结了，影响方案评价的基本因素，运用模糊决策理论和结合层次分析法，探讨了方案决策的问题，并对实例进行分析。     

Pension fund manager skills over the economic cycle: the (non-)specialization cost

We study whether pension fund managers, as professionals of important social and financial products, are able to add value for their clients and adapt to economic changes. To this end, we analyze the performance and skills (market timing and stock picking) over the economic cycle from both pension fund and manager perspectives. This double analysis allows examining whether skills reside in managers and/or funds and control for manager substitutions. Despite the long-term nature of pension funds, we find that both fund and manager skills vary with market conditions, showing better evidence of stock-picking in booms, and of market timing in recessions. Nonetheless, top (bottom) funds and managers exhibit both (incorrect) skills in booms and in recessions. Some of the top (bottom) funds and managers are the best (worst) in both abilities in the same periods, but not in different periods, showing that not all managers have the ability to adapt to market conditions. Additionally, managers with limited skills tend to specialize because diversification requires multi-task skills and the non-specialization of these managers usually results in incorrect skills.     

Co-ordination of land exploitation,exploitable farmland reserves and national planning in China

Land exploitation, as an important strategy to mitigate farmland loss and stabilize grain production, has been adopted to compensate farmland loss due to rapid urbanization in China. Bounded by the limited capacity and obvious spatial variations of national farmland reserves, it is essential to arrange land exploitation activities timely and reasonably. In this study, we propose an indicator for the status of regional land exploitation, the Exploitation Degree, to facilitate an overview of land exploitation programs in China at both provincial and prefectural levels based on project data from 2006 to 2012. To further our understanding of the regional features of land exploitation activities, we employ the Lasso model to identify and quantitatively assess influencing factors on land exploitation. Our study shows that: (1) contemporary land exploitation practices in China are significantly inconsistent across exploitable farmland reserves. Some areas are greatly over-exploited and such irrational land exploitation has been persistent; (2) related national land plans designed to guide land exploitation efforts centered on resource-rich regions and critical areas do not function as intended. Therefore, we suggest that China⿿s land exploitation policy shall be improved by reconsidering the orientation of land exploitation policy, coordinating land exploitation activities with productivity improvements and eco-system protection, and enhancing the power and scope of the plans in controlling and guiding land resource management.