人工神经网络在住房销售率预测中的应用

住房销售率是开发商最为关心的问题之一。多种不确定因素的影响为准确的预测销售率带来困难。人工神经网络能够模拟人脑的思维过程,建立多个变量的非线性模型,从而为准确预测住房销售率提供了一种新思路。     

企业网络组织协同竞争的理论与效应解析

竞争与合作相统一的协同竞争已成为企业网络竞争战略发展的必然趋势。通过对企业网络组织协同竞争研究脉络的梳理，可构建协同竞争研究的评析架构。其理论演进是：以系统思维作为理论逻辑的基点，以合作竞争为行动策略，以价值创造作为网络协同竞争的本质属性；在实践效应上，协同竞争具有提升竞争优势的特征，而博弈模型对协同效应发挥着解析工具的作用。     

The Economics and Bioeconomics of Folk and Scientific Classification

Synopsis This paper is the product of a collaboration between a biologist (Ghiselin 1997) who works on the philosophy of classification and an economist (Landa 1981, 1994) who works on the ‘Economics of Identity’: how and why people classify people based on identity in the context of a theory of ethnic trading networks. In developing the ‘bioeconomics’ (the synthesis of economics with biology) of classification, we crossed a number of disciplinary boundaries—anthropology, economics, sociology, biology, and cognitive psychology including evolutionary psychology’s ‘fast and frugal’ heuristics. Using a bioeconomics approach, we argue that folk classifications—the classifications used by ordinary persons—have much in common with scientific classifications: underlying both is the need for economy of information processing in the brain, for the efficient organization of knowledge, and for efficiency of information acquisition and transmission of information to others. Both evolve as a result of trial and error, but in science there is relatively more foresight, understanding, and planning.     

逆向物流再造网络成本优化的相关机会目标规划模型研究

逆向物流凭借着其重大的经济社会价值，成为了企业物流战略的重要组成部分。本文简要介绍了逆向物流的经济价值和特点，划分了逆向物流产品构成，重点研究了逆向物流再造网络的结构和特点，并运用相关机会规划理论建立了逆向物流再造网络的成本优化模型。     

基于动态多元代理关系网络的企业资本结构安排

随着代理理论和治理理论的发展,使得企业中产生了一个动态的多元代理关系网络。在解释和预测企业的资本结构方面,新制度经济学的代理理论提供了典范。基于现代企业多样化的动态多元代理关系网络,本文运用代理理论初步分析了现代企业的资本结构安排问题。     

农民工的社会网络变迁

采用系统模式研究了进城农民工的社会网络重构过程,指出随着谋生方式由农业生产向非农产业的转移,进城农民工正在逐步建立起以业缘关系为基础的新的社会纽带,并使之成为其社会网络的重要组成部分.这些由进城农民工一手构建的社会关系网络正在成为他们在城市生活中赖以生存和发展的重要资本.     

Spread spectrum of knowledge network based on information integration environment

The concept and the characteristic of spread spectrum technology of knowledge network based on information integration environment are given at first. And the basic principle of the wireless network of knowledge and information is recommended. Then a project alternatives using the spread spectrum technology and wireless network is given to build a across-the abroad knowledge network system.     

Competition with Congestible Networks

We analyse competition between two network providers when the quality of each network depends negatively on the number of customers connected to that network. With respect to price competition we provide a sufficient condition for the existence of a unique pure strategy Nash equilibrium. Comparative statics show that as the congestion effect gets stronger quantities will decrease and prices increase, under both Bertrand and Cournot competition. In an example with endogenous capacities it turns out that equilibrium capacities are at first increasing and then decreasing in the strength of congestion. Furthermore, capacities are higher under Cournot competition. Welfare comparisons between Bertrand and Cournot competition are unambiguous for fixed capacities, but may turn around for endogenous capacities.     

A network experiment in continuous time: The influence of link costs

In recent work on non-cooperative network formation star-shaped networks play an important role. In a particular theoretical model of Bala and Goyal (2000) center-sponsored stars are the only strict Nash networks. In testing this theoretical model, Falk and Kosfeld (2003) do not find experimental evidence that players select the center-sponsored star. Based on a slight modification of Bala and Goyal’s model, we design a network formation experiment in which, depending on link costs, periphery-sponsored stars and the empty network are the only strict Nash networks. We observe that almost all groups not only reach a strict Nash network once but also switch the center player in periphery-sponsored stars several times. The main innovation in our experiment is to use a continuous time framework which we believe to be a more realistic setting to study behavior in network formation situations and which makes coordination on stars much easier than simultaneous strategy adaptation in discrete time. Electronic Supplementary Material Supplementary material is available in the online version of this article at http://dx.doi.org/10.1007/s10683-006-9125-1. JEL Classification C72 · C92 · D81     

基于BP神经网络的征地区片综合地价评估

文章提出了征地区片综合地价的BP神经网络系统的基本构造,并在充分考虑城市规划和生活水平对征地区片土地价格影响的基础上,对神经网络的评估系统进行了设计.给出了征地区片综合地价评估的指标体系及特征指标的量化计算公式.以雅安市雨城区最新的征地区片综合地价为基础,利用改进的BP神经网络模型对它们进行了训练和模拟,取得了良好的模拟结果,证明了ANN法用来测算征地区片综合地价的可行性和先进性.