Stochastic Frontier Estimation of Market Power in the Food Industries

We use a modified version of the stochastic frontier model to estimate oligopoly markups above the perfectly competitive frontier, separating out deterministic markups from purely stochastic markups. Using data from 42 US food processing industries between 1990 and 2010, empirical results indicate a widespread incidence of oligopoly power, with Lerner indexes averaging approximately 21%. Further, the estimated markups increase with industrial concentration but decrease with price elasticities and imports. Finally, the estimated Lerner indexes are in the range of previous food industry estimates using New Empirical Industrial Organization (NEIO) models.     

Motivations to grow energy crops: the role of crop and contract attributes

Perennial energy crops are a promising source of bioenergy whose production involves production risks, long‐term commitment of land and need for crop‐specific investments without the coverage of crop insurance potentially available for conventional crops. We conduct a choice experiment in five states in the Midwestern and South‐central regions of the U.S. to examine the effect of crop‐contract attributes on the joint discrete‐continuous choice decisions to adopt an energy crop and convert acres to it from a status quo use, while controlling for the effect of various farmers’ risk and time preferences, sociodemographic characteristics, and availability of crop insurance for conventional crops. We find robust evidence that high discount rates, high upfront establishment costs and need for crop‐specific investments create disincentives for adoption and allocation of land to energy crop production. The effects of riskiness of returns and risk aversion are less robust across specifications. The effect of conventional crop insurance on the energy crop adoption decision differs across types of insurance; in particular, farmers with revenue insurance are statistically significantly less likely to adopt an energy crop. Our results have implications for the design of effective contracts and policy incentives to induce the production of energy crops.     

中国制造企业的物流外包——供应链核心成员之路

中国已成为世界先进制造业基地,具备了融入到有竞争力的国际或国内供应链的能力,但是要想成为供应链的主要成员乃至核心成员,就必须从"中国制造"向"中国服务"转型。与制造直接配套相关的服务首推"物流服务",作为中国的制造企业,进行物流外包是提升自己核心竞争力、增强综合实力的非常关键的战略举措。     

Uncovering Critical Success Factors for Business-to-Customer Electronic Commerce in Travel Agencies

Economic growth and information technology development has stimulated customer demand for foreign travel. In an intensely competitive and dynamic travel market, it is necessary for travel agencies to adopt innovative forms of information technology in order to survive and flourish. Travel executives are thus looking for an effective and efficient means to intelligently manage business-to-customer electronic commerce (B2C e-commerce) information technology applications in order to obtain and maintain sustainable competitive advantages. To this end, this study applies the multiple criteria decision-making (MCDM) method to examine consumer adoption of e-commerce. The results show that the critical success factors are associated with product information (product context) and system security (system context)—such as product content, privacy policy, purchase procedure, and product pricing. It is anticipated that by focusing on these key drivers when creating their main marketing strategies, travel agencies will be able to develop and facilitate B2C e-commerce transactions.     

采用部分频率复用的小小区网络建模与分析

小小区组网技术被认为是解决迅速增长的移动数据量需求的方法。然而,密集的小小区组网会导致严重的小区间干扰。传统的部分频率复用方法不能完全照搬用在部署不规则的小小区网络内,急需一种合理高效建模采用频率复用小小区网络的方法,对其性能进行评估。利用随机几何理论对小小区网络考虑部分频率复用场景进行建模,推导了考虑部分频率复用的小小区网络下行覆盖概率和网络吞吐量的表达式。数值仿真结果显示:部分频率复用技术可以提高小小区网络下行覆盖概率,但是会降低网络图吞吐量。在满足覆盖概率约束条件下,得到了使得网络吞吐量最大的频率复用因子的表达式。以上结果对未来采用频率复用技术的小小区组网的具体实施具有重要的指导意义。     

漫谈中日生活中的同物异法现象

中日两国一衣带水,2000多年来始终保持着多方面的交流,甚至使用着同样的汉字.有人以此认定两国同文同种.文章从最直观的汉日词语的同素异序现象出发,进一步发掘了生活中常见的几个同物异法现象,从而对两国同文同种这一观点提出异议,并提出正视差异的存在、理解存在的差异,才是迈向国际化的第一步.     

论以体面劳动为目标的劳动者权利保护

本文认为以法律保护劳动者的人格尊严,是实现体面劳动的重要条件.为了在我国实现体面劳动,需要多方的努力,特别是要完善相应的法律体系,建立起保障劳动者权益的法律机制.     

高可靠性数据传输系统LVDS交叉备份方法

以一种高可靠性数据传输系统为例，详细阐述了采用LVDS输出电平标准的交叉备份方案的设计，比较了LVDS端交叉和TTL端交叉各自的优缺点。对TTL端交叉备份方式进行了分析，重点讨论了TTL几端交叉备份方式解决主备故障隔离的几种方法，并分析了各种方法在实际应用中存在的不足。最后给出了该高可靠性数据系统中所采用的跨接电阻方案。该方案具有设计简单、可靠性高的优点。     

Ethical leadership in Chinese organizations: Developing a scale

In light of a series of ethical scandals in China in recent years, this research aims to develop a reliable and valid scale to measure ethical leadership, namely the “ethical leadership measure (ELM).” Our results show that ELM is strongly and positively correlated with scales for authentic leadership, ethical leadership, idealized influence, and a recently-developed leadership virtues questionnaire (LVQ); and negatively correlated with laissez-faire leadership and passive management by exception. ELM is also found to be positively related to followers’ job satisfaction, affective commitment, trust in leader, organizational citizenship behavior, and moral identity, and negatively related to followers’ intention to quit.     

中国股市β系数稳定性研究

β系数是证券或证券组合与市场相互关联的一个概念和参数,它是衡量证券系统风险的重要指标,β系数的稳定性也一直是学术界和投资者特别关注的焦点。本文通过中国股票市场的31个行业数据的研究,得到中国股市样本β值在单位β值(1.00)附近上下波动并呈正态分布;也可以得到组合的β系数还是有较好的稳定性结论。