Stock-Price Effects of Internet Buy-Sell Recommendations: The Motley Fool Case

The Motley Fool has attracted significant notoriety for stock market buy‐sell advice on the Internet. Across five different investment portfolios, Motley Fool buy recommendations appear to generate an average 1.62% rise in stock prices on the announcement day (0), and 2.40% returns over the announcement period (?1, +1). Sell recommendations seem to cause a ?1.49% announcement day return, and a ?3.33% announcement period return. Small cap growth stock buy recommendations for The Motley Fool's flagship Rule Breaker Portfolio are associated with returns of 3.66% on the announcement day, and a 6.15% return over the announcement period. These findings suggest herd‐like behavior among Internet investors, and that such announcements are more newsworthy than second‐hand buy‐sell recommendations published in traditional print and electronic media.     

An Environmental Macro-Economic Model for the Construction Sector

This article describes theeconomic-ecological model BASIS, which handles theconstruction sector, its consumption of materials,and the resultant environmental effects. The modelis a satellite model of the macro-economic modelADAM. The building materials examined are plastic,metal and concrete, each of which result in variousemissions that impact upon the environment andhealth. Materials consumption and energy consumptionare central environmental parameters, and can beconsidered both as indicators of environmentalpressure per se, and as explanatory variables forvarious types of emissions and waste generation. Thearticle documents BASIS and illustrates itscharacteristics through a number of scenarios. Thescenarios examine the effects of changes in variousmacro-economic variables and of environmentalpolicy-based levies.     

High-quality bias in vertically differentiated oligopolies—a note on skills, trade, and welfare

In a vertically differentiated Cournot oligopoly where the high-quality variant of the good requires the use of high-quality labor, firms may either all supply the same quality or differentiate their product. In differentiated configurations the number of firms choosing to supply the high-quality variant is generally above the optimum. The opening of trade between symmetric countries entails a pro-competitive effect that raises welfare through a reduction in average quality. This result contrasts with previous findings concerning the opening of trade in vertically differentiated oligopolistic industries (Gabszewicz, Shaked, Sutton, and Thisse,International Economic Review 22 [1981]; Shaked and Sutton, in Kierzkowski, ed.,Monopolistic Competition and International Trade, Oxford 1984).     

The Role of Groupware in Requirements Specification

This article describes how 2 forms of groupware - electronic Mail and Group Support Systems (GSS) were employed to support user requirements specification in a university department. The system being specified was a bibliographic information system, while the users were both qualified systems analysts and academic staff in the department. The background literatures to both requirements specification and GSS are introduced and linked. Groupware tools were used to support the group interaction and consensus formation. The article discusses the key stages in this process and discusses the appropriateness of the techniques used. The results are significant in that they identify techniques appropriate to supporting user groups in the clarification of system requirements before the involvement of development personnel.     

Distributed Visual Language Environments for Cooperation and Learning: Applications and Intelligent Support

An increasing number of collaborative learning environments is based on shared workspace systems using two-dimensional graph-structured visual representations such as argumentation networks and concept maps. We propose an integrated framework that allows for flexibly specifying a wide range of visual languages and plugging in components for operational semantics, adequate feedback and intelligent support. The generic application CardBoard provides card-based user interaction and collaboration by means of different languages in shared workspaces. To enhance modifiability, the interfaces between the distributed heterogeneous system components, particularly between intelligent components and user interfaces, have been standardised.     

后WTO时期外资银行对中资银行影响分析及其路径选择

后WTO时期,我国金融业开放程度不断加深,外资银行正以前所未有的深度融入我国金融体系。外资银行的进入,将从总体上提升我国银行系统效率,但同时也不可避免地带来相应的冲击。本文从客户资源、银行业务、服务手段、人力资源等角度分析了外资银行对中资银行的冲击,并提出应当通过完善金融体系、提高整体实力、培育新生力量及加强合作等策略增强中资银行抗击外资银行的实力,引导中资银行健康发展。     

企业文化、企业培训对组织绩效的影响研究

本文从实证的角度出发,以大陆上海地区、江苏地区以及台湾地区的企业为研究对象,收集244份有效样本,以LISREL结构方程式为分析工具,企图建立企业文化、企业培训与组织绩效等构面完整的理论模型,并运用大量数据进行统计分析,以解释高阶主管支持、企业文化强度对企业培训、组织绩效的影响。     

论虚拟仿真技术与群体支持系统在工程管理中联合应用

工程施工计划是一项复杂的工作，不断增长的复杂因素决定了工程管理人员需要采取新的、从未被用过、检测过的工程施工方法。缺乏便于工程策划人员进行评估和确认施工计划是否合理的工具，会在工程施工阶段造成许多重复性工作，造成成本浪费。虚拟现实技术为解决上述问题提供了一个很好的方法，会生成虚拟环境，允许项目决策人员在施工之前合理优化和选择施工方案，资源优化，降低成本，从而获得更好的投资效益。利用群体支持系统建立与工程施工计划相呼应的模型，工程数据作为其处理问题与人机交互的依据，辅助人员决策，进行项目的预算和分析，提高工程项目的价值管理。     

我国制造业不同外包形式的就业效应研究——基于动态劳动需求模型的实证检验

本文测算了我国27个制造业细分产业的总外包水平、低技术外包水平、高技术外包水平和服务外包水平,并构建了我国制造业的动态劳动力需求模型,利用一步广义距估计(One Step Diff-GMM)法分析了制造业的总体外包、低技术外包、高技术外包和服务外包的就业效应,结论为:制造业总体外包、低技术外包和高技术外包对就业呈抑制作用;低技术外包和高技术外包水平相当,但低技术外包的就业净效应是高技术外包的将近二倍;而服务外包规模尚小,还不足以对就业产生影响。     

价格支持、政策调整及粮食市场波动

目的 为了估计价格支持政策对不同粮食品种期现货价格波动的直接影响,实证分析和比较了政策及其调整对粮食期现货价格波动实施效果的影响,为深化粮食价格形成机制改革提供一定的理论参考和实证支撑。方法 文章利用稻谷、小麦、玉米和大豆的现货与期货价格日数据,将政策以虚拟变量的形式引入GARCH模型实证分析最低收购价政策、临时收储政策及其调整对平抑粮食期现货市场波动的作用。结果 价格支持政策对粮食价格波动产生了显著影响,最低收购价政策能够明显降低稻谷和小麦现货市场的波动程度,但对期货市场波动的作用则相反;玉米和大豆临时收储政策的取消导致现货市场波动性提高,而对期货市场波动的影响存在差异。结论 价格支持政策具有降低价格波动的作用效果,政策调控效果与实施品种的国内供求及市场形势、国内外市场的联系程度密切相关,政策的完善还需关注对期货市场波动的影响。