校园电子商务平台安全体系的设计

校园以其独特的优势开展了电子商务,而电子商务发展的瓶颈是安全问题．目前,对于电子商务所面临的安全问题,校园电子商务应建立通用安全平台体系结构模型,以实现电子商务应用系统的安全性要求．     

浅析基于Intranet技术网络教学平台的设计与组建

现代信息技术的发展,使得基于Intranet技术的网络教学平台成为现代教育技术改革与发展的方向。基于Intranet技术的网络教学平台可以利用学校原有的内部局域网,通过引入Intranet技术,架设WEB服务器、E-mail服务器、ICQ系统、论坛等,再配之以路由器以及使用专线的Internet接入技术,从而拓展了传统的教学平台。     

论企业网络舆论环境的营造

企业实施网络公关战略是以营造一个良好的网络舆论环境为基点的。然而,这样一个环境的形成是各个参与方共同努力的结果。企业、网络媒体、政府、网民都应为营造一个良好的网络舆论环境做努力。     

浅谈高校图书馆网络化建设

高校图书馆网络化建设是必要的也是可行的．是实现资源共享的有效途径。我们应在发挥自身优势的同时,积极进行馆际协作,搞好网络化建设。     

中国外债安全的预警机制——基于症状检测思想的实证分析

本文沿着症状检测的思路,构建了外债安全状态指数并对中国外债安全状态的变化进行了机制分析.通过分析可以得到:(1)近年来我国的外债安全状态并不稳定,外债不安全的概率出现了一定的波动和升高;(2)在国际金融危机的背景之下,应该从更全面的角度对国家外债安全情况进行判断,以避免外债危机的发生.     

净现值指数法在方案选择中的错误和危害

根据净现值指数的大小进行方案选择的方法,不但出现在各种技术经济学教科书和论文中,而且也出现在国家颁布的项目评价标准中。本文希望证明这一方法不但在理论上是错误的,而且在实践中也是有害的。     

Produce growers’ cost of complying with the Food Safety Modernization Act

Small and medium size growers using both conventional and sustainable farming practices have expressed concern that compliance with the Produce Rule implementing the Food Safety Modernization Act will be prohibitively costly. We use data from an original national survey of fruit and vegetable growers to examine that contention. In particular, we analyze how expenditures on food safety practices required by the Produce Rule vary with farm size using a double hurdle model to control for selectivity in both using food safety practices and reporting expenditures. We find that expenditures per acre decrease with farm size. We also find some evidence that growers using sustainable farming practices spend more than conventional growers on many food safety practices. We use our estimates to quantify how the cost burden of compliance varies with farm size. We then explore the policy implications of exemptions to the Rule by simulating how more stringent exemption thresholds for farm revenue and share of direct sales might affect the cost burden of each food safety practice on farms at the threshold.     

A fresh look at zero-rating

We provide an economic assessment of zero-rating offers in the context of mobile internet access services and draw six lessons: (1) Zero-rating can have several different characteristics that crucially affect their economic and welfare assessment. Thus, regulatory interventions must be based on a careful case-by-case analysis. (2) In the context of zero-rating offers, it is often crucial to evaluate the extent to which users are able to activate and deactivate a (throttled) zero-rated tariff option. If activation/deactivation is easy and instantaneous, a sound economic theory of harm for consumers will in many cases be hard to establish. (3) Similarly, if access to zero-rated partner programs is non-discriminatory and entails low barriers to entry, a sound theory of harm for content providers will usually not be given. (4) Zero-rating can be beneficial for consumers and (legal) content providers alike by contributing to a reduction of illegal content. Combined with throttling it can mitigate congestion problems. However, by requiring all content belonging to the same content category to be treated equally with respect to throttling, independent of whether a content provider opted for zero-rating or not, the existing regulation creates a negative externality on those content providers that do not wish to be zero-rated for some reason. (5) Particular attention should be paid to the impact of throttled zero-rating tariffs on the competition between mobile network operators (MNOs) and MVNOs. The latter may not be able to compete on equal footing with MNOs, because they benefit less from the traffic management aspects of zero-rating. (6) Competition among (infrastructure-based) ISPs provides a safeguard against severe rent extraction and, thus, an abuse of throttling and zero-rating as an exploitative device. Therefore, regulators should carefully account for the competitive environment and the existing tariff portfolio and options before deciding to intervene. Competition policy, rather than ex-ante regulation, may be more suitable for this task.     

Equity valuation in practice: The influence of net financial expenses

This study investigates the relevance of net financial expenses with respect to equity valuation in an IFRS accounting regime. According to the residual earnings valuation model, income related to balance sheet items that are recorded at fair value is not applicable for valuation purposes. There are no residual earnings associated with these items because the balance sheet provides ‘perfect’ value estimates for the items in question. In accordance with the contention that under IFRS, aggregate net financial liabilities are recorded at a book value that is close to fair value, this study demonstrates that net financial expenses are not associated with the market prices of stocks. The investigation discusses the empirical findings in light of the enduring controversies regarding the use of fair value accounting.     

员工创新行为缘何不同：成就目标导向对员工创新行为影响的双路径研究

目标导向会对员工行为产生指引和影响作用。基于目标导向理论和知识管理理论，引入知识共享和知识隐藏两个变量，考虑情境因素的影响，构建多类别成就目标导向通过双路径影响创新行为的理论模型，研究成就目标导向对创新行为的影响机制。实证发现：不同成就目标导向对创新行为的影响存在差异，其中，学习目标导向和绩效趋近目标导向正向影响创新行为，知识共享起中介作用；绩效回避目标导向负向影响创新行为，知识隐藏起中介作用；心理安全氛围调节成就目标导向对创新行为的影响。