A simple model of brain circulation

This paper analyzes the allocation of two types of individuals differentiated by talent between two countries where they choose to be workers or entrepreneurs. An equilibrium with international migration exists when countries' talent endowments are sufficiently different. It is consistent with one-way or two-way migration whether individuals are entrepreneurs or workers. Although allowing migration increases domestic welfare in one country and decreases it in the other, it is always supported by majority voting in both countries.     

Adoption Dynamics in Buyer-Side Exchanges

The purpose of this paper is to understand buyer/seller adoption dynamics in independent, buyer-side B2B exchanges. In a stylized model, we assume that the main role of the exchange is to reduce search costs for buyers. Buyers and sellers enter or exit the exchange based on the relative economic surplus (loss) they receive inside vs. outside the exchange. We contrast two situations: one where participants' switching cost to join the institution is negligible and another, in which it is significant. In an extension, we also explore the impact of buyer/seller heterogeneity on adoption dynamics. We have three key findings with relevant implications for practice. First, we find that the general view that demand and supply (so-called liquidity) either grows or shrinks in the marketplace may not hold. In the presence of switching costs, the exchange can evolve to a stable state with only partial market participation. Second, our results suggest that the exchange is better off subsidizing buyers as opposed to sellers in order to achieve the so-called critical mass, beyond which there is full participation. Finally, we find that while in general, minor buyers of the industry have more incentive joining the exchange, when the fixed participation fee of the exchange is high, it is major buyers who are likely to join first. For sellers, this is not the case: minor sellers are always more keen in participating in a buyer-side exchange.     

中国B2C旅游电子商务盈利模式比较研究--以携程旅行网和春秋旅游网为例

本文以携程旅行网和春秋旅游网为例，对两种具有普遍性的B2c旅游电子商务盈利模式建立模型并进行市场调查，比较分析这两种模式的共同点、核心差异、相对优劣和市场对他们的选择倾向，探讨我国B2C旅游电子商务与传统旅游企业结合的合理途径以及未来盈利模式的调整与发展方向，指出市场是判断盈利模式合理性的唯一标准。     

P2P平台投融资业务信息传递路径及风险的探讨

信息风险是P2P平台投融资业务作为市场创新业务面临的困境之一。具体的投融资业务信息直接构成了P2P平台交易的主要条款,P2P平台信息对投融资业务有信息保障或信用担保的作用,市场系统信息决定了机会成本。P2P平台投融资业务信息传递路径是始于融资者形成交易的基本条款,经过P2P平台增强交易信息和可信度,其中包含监管措施和手段的市场系统信息成为交易的机会成本,最终所有信息汇集到投资者那里。因此,P2P平台投融资业务的监管不应该针对正常市场信息风险,而应该针对融资者和P2P平台的特定利益信息风险来展开监管措施和手段。     

P2P平台风险控制供求关系的探索

健全而有效的风险控制对发现P2P平台投融资新业务市场空间有着积极的作用。P2P平台风险控制的供求关系说明风险控制不仅是融资者和P2P平台内部的管理措施与行为,而且,作为投资者等外部需求的组成部分,这也成为P2P平台投融资业务市场交易的必要条件。健全有效的风险控制,能够给予P2P平台投融资业务更大的发展空间。     

一种新的软聚类方法在入侵检测中的应用

本文在FC(MFuzzyC-Means)算法的基础上结合自适应和模糊截集理论提出了一种新的算法S2AFC(MSectionSetAdaptiveFCM),以及这个算法针对进程轨迹序列在异常检测中的应用。本算法能够克服聚类数目c要求预先确定、局部最优、分类不确定等弱点,在聚类过程中可动态调整并自动获得最佳的聚类数目。最后用实验和相关数据证明了本算法的正确性和有效性。结果表明本文所提出的算法能够有效地检测入侵,并在性能上有所提高。     

TiO2光催化氧化研究进展

本文着重介绍了光催化氧化反应的特点，TiO2的性质及光催化的原理，TiO2光催化剂的制各方法及其应用，提出目前存在的问题，对研究开发方向做了展望。     

中国外贸进出口对税收的影响：理论与实证

对外贸易对中国的税收有怎样的影响?回答这一问题，对制定贸易政策有重要的现实意义。本文对1-2-3模型进行修正，将总产出区分为4种具有不同税收特征的产品，构建相应的税收模型，从理论上分析了对外贸易对税收有正面的影响。实际测算显示，一般贸易出口每增加1元人民币，会相应带动当年税收增加0．4～0．5元人民币。通过对季度数据的Granger因果检验和向量误差修正模型分析，本文发现出口增加对税收有持续的正面影响。     

基于P2P技术的供应链信息共享应用模式探讨

P2P技术是一种新的Internet应用模式,本文在分析传统供应链信息共享不足的基础上,从减少信息服务成本、节约社会资源角度出发,研究了P2P技术在电子商务领域应用的结构框架,并对基于P2P技术的信息资源共享模式进行了探讨。     

B2B电子商务模式促进我国企业信用管理体系的建立

目前,我国企业普遍面临着严重的信用问题。缺乏有效完善的企业信用管理机制是造成这种局面的一个主要成因。从B2B电子商务的角度来分析,B2B模式有促进我国企业信用管理体系建立的可行性。并且企业利用第三方B2B交易平台所提供的资源,可以建立信用管理机制。