Information flows and crashes in dynamic social networks

We develop a dynamic model of information transmission and aggregation in social networks in which continued membership in the network is contingent on the accuracy of opinions. Agents have opinions about a state of the world and form links to others in a directed fashion probabilistically. Agents update their opinions by averaging those of their connections, weighted by how long their connections have been in the system. Agents survive or die based on how far their opinions are from the true state. In contrast to the results in the extant literature on DeGroot learning, we show through simulations that for some parameterizations the model cycles stochastically between periods of high connectivity, in which agents arrive at a consensus opinion close to the state, and periods of low connectivity, in which agents’ opinions are widely dispersed.

     

工程建设质量控制中的特殊过程确认

ISO9001质量管理体系中对特殊过程及特殊过程确认作了具体规定,本文就特殊过程及特殊过程确认的概念、特点、内容、方法作了分析,结合其对工程建设中质量控制的指导意义,分析说明了在监理工作中进行质量控制的具体做法。     

The relationship between governance structure and risk management approaches in Japanese venture capital firms

This paper attempts to understand what drives Japanese venture capital (JVC) fund managers to select either active managerial monitoring or portfolio diversification to manage their firms' investment risks [J. Bus. Venturing 4 (1989) 231]. Unlike U.S. venture capitalists that use active managerial monitoring to gain private information in order to maximize returns [J. Finance 50 (1995) 301], JVCs have traditionally used portfolio diversification to attenuate investment risks [Hamada, Y., 2001. Nihon no Bencha Kyapitaru no Genkyo (Current State of Japanese Venture Capital), Nihon Bencha Gakkai VC Seminar, May 7]. We found that performance pay is positively related to active monitoring and that management ownership is positively related to active monitoring and negatively related to portfolio diversification. The managerial implication of our study is that venture capitalists should be as concerned about the structure of their incentive systems for their fund managers as they are for their investee-firm entrepreneurs. Agency theory says that contingent compensation is a self-governing mechanism for individual effort that is difficult to measure and verify. When properly applied, equity ownership and performance-based pay can have powerful influencing effects on the strategic choices of managers.     

加快向公共服务型政府转变--从SARS突袭谈起

SARS危机直接暴露出我国政府在公共卫生和医疗,尤其是农村公共卫生和医疗中的欠账太多。从有关数据显示,我国经济增长的成果没能主要投资于公共卫生和医疗、社会保障、教育等社会事业发展问题,政府仍是一个经济建设型政府,远没有完成向公共服务型政府的转变。经济建设型政府,比     

跨国公司跨境环境管理战略模式及其影响因素

跨国公司国际生产的延伸带来了对生产过程中的环境问题,引起了对跨国公司环境管理战略的关注.本文介绍的跨境环境管理的模式,其集中程度是由分散化逐渐向高度一体化提升的一个连续的集合.影响跨国公司各环境管理战略一体化程度因素包括产业因素、公司内部因素、正式规制因素以及市场因素.     

The New Economy is dead,long live the information economy

The arrival of the 2001–2003 recession caused many to suppose that the so-called “New Economy” was now defunct. This article addresses a number of related issues, including the question of the durability and viability of business cycles in the face of the technological developments of the information age. It asks what went wrong with the New Economy and examines its characteristics as well as its remaining possibilities and prospects for the future. Finally, it considers the spread of the Information Economy to Europe, especially to Germany, the country that one might expect to be the leading European player, but which is not at present actually a strong competitor for that role.     

悬浮床加氢裂化工艺技术经济分析

介绍了重油悬浮床加氢裂化工艺的最新发展，对国内新开发的悬浮床加氢裂化工艺特点作了介绍。并将悬浮床加氢和三种重油轻质化工艺——固定床加氢、延迟焦化、重油催化裂化在技术经济上作了分析对比。在原油品质越来越差的今天，针对劣质重油而开发的的悬浮床加氢裂化工艺具有非常广阔的应用前景。     

趋势与对策:中国保险业经营环境发展研究

作为中国金融业的一个重要组成部分,保险业处在对外开放的前沿,中国加入世界贸易组织为其所设定的过渡期已经结束,论文分析了过渡期以后中国保险业经营环境的变化趋势,并针对性地给出了对策建议。     

解读会计信息产权

会计信息外部性的存在带来会计信息供求的冲突,解决此冲突的规则就是会计信息产权。会计信息产权需要界定才能发挥其应有的效能,会计信息产权的界定取决于对企业所有权分享、管制和道德等因素,企业所有权分享下的会计信息产权界定是初始的界定,无法完成初始界定时可采用管制方式进行强权界定,道德是会计信息产权界定不可缺少的因素。国企改革所滋生的各种问题的根源在于会计信息产权畸形性,欲抑制其畸形,正确处理国企所有权的分享问题的同时,建立“共同治理”的机制和“相机治理”机制是必不可少的。