基于LINGO的快递企业物流节点布局规划方法

研究快递企业物流节点布局问题,首先分析快递业务流程,然后在此基础上建立了混合非线性0-1规划模型,即在确定的业务网点备选地点中选出恰当的网点,使系统总费用最低。最后,结合武汉某快递公司实例,使用Lingo软件具体分析了建模、求解过程,结果显示其是一种有效的求解物流节点布局最优化的方法,对快递企业物流节点布局规划过程有一定的帮助。     

Informational cascades with endogenous prices: The role of risk aversion

In this paper, we show that long run market informational inefficiency and informational cascades can easily happen when trades occur at market clearing prices. We consider a sequential trade model where: (i) the investors’ set of actions is discrete; (ii) dealers and investors differ in risk aversion; (iii) investors’ information is bounded. We show that informational cascade occurs as soon as traders’ beliefs do not differ too sharply. Thus, prices cannot fully incorporate the private information dispersed in the economy.     

Identification and estimation in sequential,asymmetric, English auctions

Within the independent private-values paradigm, we derive the data-generating process of the winning bid for the last unit sold at multi-unit, sequential, asymmetric, English auctions. When the identity of the winner and the number of units won by each bidder in previous stages of the auction are observed, we demonstrate nonparametric identification and propose a semi-nonparametric estimation strategy based on orthogonal polynomials. We apply our estimator to daily data from fish auctions in Denmark. For single-unit supply, we use our estimates to compare the revenues a seller could expect to earn were a Dutch auction employed instead.     

价值工程在新药研发中的应用浅析

加快价值工程（VE）在新药研发中的应用,降低新药研发成本,从而控制医疗费用不断上涨。研究了VE发展现状,比较了VE与项目管理及药物经济学之间的区别,分析目前其在医药领域应用的困难。针对存在的困难,主要从加强政府主导、加快人才培养和理论基础研究、建立风投机制等四个方面入手,来加快VE理论在新药研发中的应用。     

基于AT89C51SND1C的mp3播放器的设计

本设计采用了以AT89C51SND1C为主控芯片,同时利用其MP3解码模块和USB控制模块,加上外接的Flash存储器,在实现U盘的基础上完成MP3播放器的功能.本论文研究了基于Atmel公司的AT89C51SND1C的MP3播放器的实现方法,给出了相应的电路原理图,以及AT89C51SND1C中提供的MP3解码模块和音频输出接口的控制.同时对Flash存储的相关内容也做了相应的介绍.     

Buyer investment, export variety, and intrafirm trade

This paper studies a model of buyer investment and its effect on the variety and vertical structure of international trade. A distinction is made between two types of buyer investment: “Flexible” and “specific”, which differ in the ability of a buyer to match with a seller. The interaction of buyer investment with the entry and pricing incentives of suppliers are analyzed. It is shown that (i) there can be multiple equilibria in the variety of products traded, and (ii) less product variety is associated with more intrafirm trade. The possibility of multiple equilibria is consistent with the observation that some similar economies, such as Taiwan and South Korea, differ substantially in their export varieties to the U.S. A cross-country empirical analysis confirms the negative correlation between export variety and intrafirm trade.     

Income based price subsidies and parallel imports

We present a policy game where a Rich country has a higher ability than a Poor country to commit to certain elements of health policy such as providing income related price subsidies and allowing parallel imports (PI). When allowing PI is not a choice for the Poor country, the Rich country allows PI and both countries provide a subsidy to their poorer buyers as the subgame perfect equilibrium policies. However, when the Poor is able to PI a different equilibrium may arise. We show that the ability of the Poor to allow PI might increase welfare in this country even if it is never implemented. We also prove that as the Poor country gets richer, it will not be in their best interest to sign an agreement with the Rich to commit to not allowing PI.     

The constitutional future of the European Union

The formal distinction between a treaty and a constitution is much less important than the question of who is authorized to interpret and amend it. The judges of the European Court of Justice interpret the Treaty by simple majority, while unanimity of the member-states would be required to reverse these decisions. The European Union needs a Court whose judges are empanelled from, and selected by, the highest courts of the member-states. The Treaty on European Union violates three fundamental constitutional principles: (i) the principle of the separation of powers, (ii) the democratic principle, and (iii) the principle of subsidiarity.     

高校智力资本运作效率的数据包络分析

文章在综合分析高校智力资本的基本概念和主要内容的基础上，提出了用数据包络分析方法评价高校智力资本运作效率的基本思路与方法，并以8所高校在同一学科中的智力资本运作情况为算例，对数据包络分析的算法和所使用的计算工具作了说明。