我国实施战略性资源保护政策的实效分析

2007年《外商投资产业指导目录》对矿产开发和勘探产业做出不少限制性和禁止性规定,特别是稀有矿产由“限制外商开采”到“禁止外商开采”的改变最为引人注目,标志着中国着手实施战略性资源保护政策。本文在该措施实施的理论依据、实施条件和实证案例进行分析的基础上,为中国实施战略性资源储备和贸易政策以消除“大国贫困化增长”困境提出政策性建议。     

整车热管理系统方案设计

针对整车开发前期难以获得全局最优的系统方案的问题提出一种解决方法,包含多系统联合仿真、多目标优化及综合评价3个环节.以整车热管理系统为研究对象,基于Dymola和Isight开展一维多学科联合仿真并获得Pareto方案集;然后采用层次分析法以及加权评分对Pareto方案集进行综合评价,得到了全局最优的系统方案.满足约束条件下与基础方案相比,综合评分提升27.3％.     

中国股票市场异常下跌时期的日历效应分析

利用Var方法界定出股票市场的异常时期后,可对股票市场异常下跌时期的日历效应进行分析。实证表明我国股票市场在异常下跌时期具有明显的“五月份效应”、“周初效应”和“周末效应”。“五月份效应”的产生与我国上市公司的会计信息披露时间以及经济政策的调整和公布时间有关,而“周初效应”和“周末效应”与大多数学者已证实的股票市场正常时期的周内效应是一致的。     

一种基于遗传算法的区域物流网络选优方法

本文利用区域物流的有关理论,探讨了物流网络建设的框架,结合区域物流服务的需要,从第三方物流企业的角度出发,侧重于对区域现有的物流中心进行整合和选择,利用改进的遗传算法对现有物流节点进行最优化选择,从而在根本上提高区域物流网络建模的效率和运行参数的可靠性。     

配送中心选址的遗传算法研究

针对配送中心的选址问题,将遗传算法这一全局搜索优化技术运用其中,通过建立选址的遗传算法模型,研究了算法设计,分析了其特点,并与传统的混合整数规划解法进行了分析比较。     

政府补贴下的三级低碳供应链减排博弈研究

本文分别构建了政府补贴下,供应链上企业单独减排、供应商对制造商碳减排成本进行分担、供应商和零售商均对制造商碳减排成本进行分担3种减排模型,求解得到不同减排模式下,包括成本分担率和单位减排量在内的供应链最优决策。研究发现,政府补贴率的提升反而使成本分担率降低。通过博弈分析及算例验证得出：在供应链上三方企业联合减排下,即供应商和零售商都对制造商的碳减排研发提供资金支持时,单位产品的减排量及各企业利润达到最大,仅供应商对制造商碳减排成本分担时次之, 供应链上企业单独减排时最小, 但仅供应商一方对制造商的碳减排成本进行分担时的成本分担率,比其与零售商同时分担时的要大。这些结论为政府确立合适的补贴方案及供应链上企业减排策略的制定提供了理论依据。     

Hedge fund seeding with fees-for-guarantee swaps

This paper introduces a new instrument in the context of hedge fund seeding, which we call fees-for-guarantee swap, with the aim of alleviating the early-stage funds (ESF) managers' financial constraint caused by severe asymmetric information between investors and managers. The swap plays a role in enhancing the ESFs manager's credibility by swapping part of her fees for an insurance on the behalf of seeding investors, whom would be fully refunded once the fund defaults. We set up a dynamic continuous-time framework within which closed-form prices for seed capital, guarantee costs and other claims have been derived. Our numerical findings indicate that incentive compensations, managerial ownership and hedge funds liquidation risks not only inhibit ESFs managers' risk-shifting incentive but align interests among ESFs manager, seeder and insurer as well.     

Principles of Tax Design,Public Policy and Beyond: The Ideas of James Mirrlees, 1936–2018

Sir James Mirrlees, co‐recipient of the 1996 Nobel Memorial Prize in Economic Sciences, passed away in August 2018. This article outlines how his work has transformed economists’ understanding of their discipline – from the principles of tax design to the theory of contracts and beyond. By conceiving of policy questions in terms of information asymmetries between governments and taxpayers, Mirrlees demonstrated how to conduct convincing analysis of redistributive objectives together with incentive effects in the design of general tax systems and public policy more broadly. His ability to simplify complex problems in ways that reveal their tractable essence means that his work has yielded insights that have reverberated throughout the discipline. It has also proved highly fruitful for practical policy design.     

Date-stamping multiple bubble regimes

Identifying the start and end dates of explosive bubble regimes has become a prominent issue in the econometric literature. Recent research has demonstrated the advantage of a model-based minimum sum of squared residuals estimator, combined with Bayesian Information Criterion model selection, over recursive unit root testing methods in providing accurate date estimates for a single explosive regime. However, in the context of multiple bubbles, a large number of models are possible, making such a model-based method unappealing. In this paper, we propose a two-step procedure for dating multiple explosive regimes. First, recursive unit root tests are used to identify a ‘date window’ in which an explosive episode starts and ends. Second, a model-based BIC approach is used to precisely estimate the regime change points within each date window. In addition, our method allows us to distinguish between different types of explosive episode, such as whether or not each explosive regime crashes before reverting back to a unit root process, and date any crash regimes. Monte Carlo simulations highlight the effectiveness of our procedure when compared to existing methods of dating. The value of the new methodology is also demonstrated through an empirical application to housing markets.     

信用证结算方式下提单日期问题的探讨

提单是信用证结算方式下主要单据之一,提单日期是提单重要记载事项。在国际结算中存在提单日期同信用证规定装运日期不符的现象,也存在提单日期同实际装运日期不符现象。文章从国际结算和国际运输相关法律角度对上述问题进行探讨。