借鉴国外经验发展我国住房合作社

作为解决中低收入人群住房问题的途径,住房合作社在许多国家已经取得了广泛的发展.面对我国房地产市场存在的诸多问题,如何解决中低收入人群的住房问题成为社会普遍关注的焦点.应当从我国实际出发,积极借鉴国外经验,推动住房合作社发展.     

我国大学毕业生住房保障制度研究

随着我国住房保障制度的深化，廉租房和经济适用房等低收入家庭住房保障体系基本已经建立。然而，作为社会主义建设的主要力量的大学毕业生，他们既不符合低收入家庭的标准，又无力购买商品房，成为住房保障制度的“夹心层”，住房问题巫待解决。本文在介绍我国现阶段的住房保障制度的基础上，对大学毕业生的住房问题进行探讨和分析，并提出过渡性住房模式来解决我国现阶段大学毕业生住房问题。     

我国住房保障财政支出的现状分析

近年来,房价不断攀升,住房问题日渐成为社会生活中的热点问题。中低收入阶层仅仅依赖家庭收入已远不能解决住房问题,需要依赖政府帮助,最主要的依赖于政府财政支出。本文通过分析我国住房保障财政支出的现状,从而分析我国住房保障财政支出的趋势,提出改善住房保障财政支出的建议。     

农民工住房保障制度探讨

大量农民工住房条件的恶劣现状,决定了解决农民工的住房问题是势在必行。现有住房保障制度是造成农民工住房问题的一个原因。国际住房保障制度主要有三种模式,根据我国国情,政府以低息贷款或税收优惠政策吸引开发住房的模式值得我国在建立农民工住房保障制度时借鉴。     

住房保障制度的国际间比较

我国当前面临的低收入群体住房问题,可以说是一个体制建设问题.本文通过对国际住房保障制度的比较分析,立足于我国的具体国情与国际经验的启示与借鉴,为我国住房保障体制的完善提出建设性的建议和措施.     

借鉴国外经验发展我国住房合作社

作为解决中低收入人群住房问题的途径,住房合作社在许多国家已经取得了广泛的发展。面对我国房地产市场存在的诸多问题,如何解决中低收入人群的住房问题成为社会普遍关注的焦点。应当从我国实际出发,积极借鉴国外经验,推动住房合作社发展。     

廉租住房制度建设探析

20多年以来,我们国家住房制度改革在不断地深化,但是广大的低收入者阶层的住房问题仍然是一个突出的问题,值得普遍关注。从我国廉租住房制度的实施现状着手,深入分析了通过扩大保障范围、增加廉租住房房源和保障资金投入等方式加强廉租住房建设,解决低收入家庭的住房问题。     

廉租住房制度建设探析

20多年以来,我们国家住房制度改革在不断地深化,但是广大的低收入者阶层的住房问题仍然是一个突出的问题,值得普遍关注。从我国廉租住房制度的实施现状着手,深入分析了通过扩大保障范围、增加廉租住房房源和保障资金投入等方式加强廉租住房建设,解决低收入家庭的住房问题。     

保障性住房制度问题研究

住房是人的基本权利,同时,受传统文化的影响,实现"住有所居"更是国人的愿望,自98年以来,我国逐步完成了由福利分房向商品房制度的转变,但是,由于住房市场自身的缺陷性,以及近年来房价的不断上涨,使得部分中低收入居民难以通过自身收入来解决住房问题,这已成为非常重要的民生问题。我国是社会主义国家,解决中低收入者的住房问题是政府的重要职责。同时,党的十八大报告中指出:建立市场配置和政府保障相结合的住房制度,加强保障性住房建设和管理。同时还提出了"住房保障体系基本形成"的新要求,由此可见,研究保障性住房制度具有重大的理论意义和现实意义。     

高校教职工住房问题的社会化改革探析

按照国务院<关于进一步深化城镇住房制度改革加快住房建设的通知>的精神要求,我国住房制度改革已停止住宅实物分配,逐步实行住房分配货币化.各地相继建立起以经济适用房为主的多层次住房供应体系,完善了公积金和住房金融信贷等住房保障体系,住房交易市场日趋规范,房地产市场体系基本建立起来.高校教职工住房问题是高校后勤保障的重要组成部分,应当按照国家的整体改革目标不断推进.随着高校后勤社会化改革的不断深入,高校教职工住房问题的社会化改革具有重要的现实意义.     

Teaching problem solving and database skills that transfer

The main goal of teaching a database application is to prepare students to use the application as a tool to gather information and to solve problems. This study investigated two approaches to teaching problem solving with database applications with the goal of preparing students to transfer their problem solving and database skills to solve an ill structured business problem. The findings reveal that neither the problem solving instruction approach nor the problem solving discovery approach improved students' transfer of problem solving skills. Students continue to have difficulty selecting efficient database procedures to support their problem solving processes. Further research is recommended.     

面向卫星-地面协同通信系统的物理层安全传输设计

为增强多窃听者场景下的卫星-地面协同通信系统数据传输安全性,首先建立以卫星链路物理层安全传输速率最大化为优化准则、地面链路传输质量和信号发送功率为约束条件的卫星-地面协同传输优化问题。由于该优化问题的非凸性,随后通过引入辅助变量,将原问题分解为主、次两个子问题进行迭代求解,其中主问题为一维搜索问题,次问题则需进一步借助半正定松弛和矩阵变换方法转换为等价凸优化问题。最终,提出一种基于物理层安全的卫星-地面协同传输设计方案。计算机仿真结果表明,信号发射功率和卫星天线数的增加可提升系统安全速率,而窃听者数量的增加则会使得系统安全性降低。     

Optimal Stopping and the American Put

We show that the problem of pricing the American put is equivalent to solving an optimal stopping problem. the optimal stopping problem gives rise to a parabolic free-boundary problem. We show there is a unique solution to this problem which has a lower boundary. We identify an integral equation solved by the boundary and show that it is the unique solution to this equation satisfying certain natural additional conditions. the proofs also give a natural decomposition of the price of the American option as the sum of the price of the European option and an "American premium."     

Optimal consumption and investment under transaction costs*

In this paper, we consider the Merton problem in a market with a single risky asset and proportional transaction costs. We give a complete solution of the problem up to the solution of a first‐crossing problem for a first‐order differential equation. We find that the characteristics of the solution (e.g., well‐posedness) can be related to some simple properties of a univariate quadratic whose coefficients are functions of the parameters of the problem. Our solution to the problem via the value function includes expressions for the boundaries of the no‐transaction wedge. Using these expressions, we prove a precise condition for when leverage occurs. One new and unexpected result is that when the solution to the Merton problem (without transaction costs) involves a leveraged position, and when transaction costs are large, the location of the boundary at which sales of the risky asset occur is independent of the transaction cost on purchases.     

韩国应对劳工短缺的政策选择及其对中国的借鉴

劳工短缺现象已成为东亚许多国家的普遍问题。这个问题并不是经济自发调节便可消除的暂时现象,如长期持续下去,将对各国的产品出口以及经济发展构成严重的制约。韩国自20世纪80年代末起便开始了对劳工短缺问题的调查研究,积累了大量的文献与实践经验。在描述韩国劳工短缺现状的基础上,探讨其成因并介绍韩国政府对此问题所采取的措施及实施效果。提出了对解决我国劳工短缺问题的可借鉴之处。     

投资股价敏感性问题研究述评

金融危机之后,股价大幅下挫,投资水平也大幅缩减,投资和股价之间的敏感性问题重新引起人们的关注。股票市场是否以及如何影响实体经济的问题成为一个现实话题。事实上,投资和股价之间的敏感性问题既是一个规范问题,又是一个实证问题。系统梳理新古典金融学和行为金融学框架下的投资股价敏感性问题研究,有利于澄清现阶段的一些争论。     

Dynamic Optimization of Long-Term Growth Rate for a Portfolio with Transaction Costs and Logarithmic Utility

We study the optimal investment policy for an investor who has available one bank account and n risky assets modeled by log-normal diffusions. The objective is to maximize the long-run average growth of wealth for a logarithmic utility function in the presence of proportional transaction costs. This problem is formulated as an ergodic singular stochastic control problem and interpreted as the limit of a discounted control problem for vanishing discount factor. The variational inequalities for the discounted control problem and the limiting ergodic problem are established in the viscosity sense. The ergodic variational inequality is solved by using a numerical algorithm based on policy iterations and multigrid methods. A numerical example is displayed for two risky assets.     

INTEGRATING PRODUCTION AND TRANSPORTATION SCHEDULING DECISIONS BETWEEN TWO GEOGRAPHICALLY SEPARATED PLANTS

Integrating the scheduling of transportation between an intermediate plant and a finishing plant with the simultaneous scheduling of short run production at these plants represents a challenging problem. The paper addresses this problem and illustrates the significant potential benefits of an integrated approach to this problem.     

CLASSICAL AND IMPULSE STOCHASTIC CONTROL FOR THE OPTIMIZATION OF THE DIVIDEND AND RISK POLICIES OF AN INSURANCE FIRM

This paper deals with the dividend optimization problem for a financial or an insurance entity which can control its business activities, simultaneously reducing the risk and potential profits. It also controls the timing and the amount of dividends paid out to the shareholders. The objective of the corporation is to maximize the expected total discounted dividends paid out until the time of bankruptcy. Due to the presence of a fixed transaction cost, the resulting mathematical problem becomes a mixed classical-impulse stochastic control problem. The analytical part of the solution to this problem is reduced to quasivariational inequalities for a second-order nonlinear differential equation. We solve this problem explicitly and construct the value function together with the optimal policy. We also compute the expected time between dividend payments under the optimal policy.