CEV模型的单位根检验研究

CEV模型（Constant Elasticity of Variance Model）作为常用的利率模型，在实证分析中得到了广泛运用，但是其单位根检验一直被忽略或者被默认可以使用迪基一富勒检验。本文首次运用Box—Cox变换的技巧，针对CEV模型的单位根检验问题，找到了合适的统计量并且证明其渐进分布存在，然后通过蒙特卡罗方法求出了该统计量的分布表。得到了在大样本的情形下可以沿用迪基一富勒检验，但在小样本的情形下与迪基一富勒检验有所偏差的结论。     

代际可持续发展:基于艾奇沃斯方框图的分析

文章从可持续发展的内涵与条件入手,借助于微观经济学的艾奇沃思方框图,分析了人类社会代际可持续发展资源配置的两种情形:无效的帕累托最优和有效的帕累托最优。得出了可持续发展是经济增长可持续、社会发展可持续、生态环境可持续和人力资源可持续的统一,代际可持续发展是人力资源可持续性与科学技术可持续性统一的基本结论。     

A case study: The impact of low-cost carriers on inbound tourism of Saudi Arabia

This study investigates the impact of low-cost carriers (LCCs) on Saudi Arabia's tourism demand. It also provides an understanding of the relationship between air transport development and tourism development in the Gulf region. The Box–Jenkins SARIMA-X models were employed to model and forecast international tourist arrivals to Saudi Arabia, using monthly international tourist arrivals to Saudi Arabia from July 2010 to December 2015. The forecasting models were significantly accurate, with lower values of MAPE, MAP, and RMSE. The findings suggest that an increase in airline capacity, religious travel, and airline competition are associated with the increasing international tourist arrivals to Saudi Arabia. This also indicates that there is a positive relationship between air transport development and tourism development. Further aviation liberalisation in the Gulf region is discussed to give opportunities for the region's LCCs to increase their share of the increasing air travel demand, thereby enhancing tourism development.     

The negative spillover effect of food crises on restaurant firms: Did Jack in the Box really recover from an E. coli scare?

Despite the enormous impact of food crises on restaurants, limited understanding of their long-term impacts and associated factors has undermined crisis managers’ ability to handle crisis situations effectively. This article investigated the long-term impact of food crises on the financial performance of restaurant firms and identified the factors that influenced this impact. This explanatory study examined the case of Jack in the Box, whose 1993 Escherichia coli scare was the first and largest restaurant-associated food crisis in modern times. An event study method was used to uncover stock price movements of Jack in the Box, in conjunction with 73 unrelated food crises that occurred from 1994 to 2010. Stock prices of Jack in the Box exhibited significantly negative responses to other firms’ food crises, moreover, the negative spillover effect was stronger if the crisis occurred closer in time, was similar in nature, and was accompanied with no recall execution. These findings shed light on the long-term financial impact of food crises and offer insights for crisis managers to develop more effective crisis management strategies.     

虚拟仪器技术对知识创造的影响研究

仪器作为现代科学研究的核心组成部分，在很大程度上决定了科学知识的产出。虚拟仪器技术对知识创造产生了深远影响。“软件就是仪器”的理念使得传统仪器、测量观念以及仪器作为科技黑箱的内涵和功能发生了质的变化。虚拟仪器在集成大量编码知识的同时更多地集成了主体的隐性知识，虚拟仪器技术通过对主体知识体系的重塑影响了知识创造。主体只有通过长时间、复杂的学习和使用过程才能充分发挥虚拟仪器技术在知识创造中的优势，实现编码知识和隐性知识的共同增长。     

Supporting innovation and venture development in established companies

Accumulated research findings call into question the ability of established corporations to develop and manage new ventures successfully. This article argues that the problem comes in large part from failing to differentiate between the requirements of administrative management—geared to managing existing activities and holding things in place to ensure continuation of already-developed activities—and the requirements of entrepreneurial management—designed to create change by developing something new. The two kinds of management are in tension and may interfere with each other, but every established organization needs both in order to get both innovation and efficiency.Innovations and new ventures have four particular characteristics that account for their special management requirements: uncertainty, knowledge-intensivity, competition with alternative courses of action, and boundary-crossing. Thus entrepreneurial management to support creation of the new puts a stress on such features as visionary leadership, “patient money,” planning flexibility, team continuity/stability, and interfunctional cooperation. But the usual requirements of administrative management in established corporations contradict these principles. Thus some companies try to set their new ventures apart from the old to avoid conflicts in management requirements. However, this this only partially solves the problem.All companies need both to manage ongoing activities and to create new ones—with the proportions of each depending on the nature of the business. They need to strike a balance between administrative and entrepreneurial management. The problem of venture development in established corporations occurs when administrative management comes to dominate and innovation is not valued sufficiently. The command system of administrative management needs to be replaced by a mutual adjustment system.High innovation companies build mutual adjustment into their design. They allow flexibility to move into an entrepreneurial mode. They are characterized by broader jobs: structures built around small business units or functionally complete project teams; cultures stressing the ability of people to contribute more over time; and easy access to the key “power tools” of information, support, and resources.A more entrepreneurial corporation minimizes hard-and-fast rules and procedures governed by a rigidly defined command structure and emphasizes instead flexibility and broadly-skilled sets of employees in flexible units that can be grouped or regrouped as changing circumstances require.Large corporations must institute deliberate programs to encourage innovation and entrepreneurship, including removing the roadblocks of unnecessary administrative requirements; encouraging integration across departments and functions: changing budgeting and accounting procedures and providing internal venture capital and special project funds; discretionary time; and new business performance measures.     

Plastic wastes and the market penetration of auto shredders

In recent years the increased interest in the recycling of plastic wastes has lead to the development of numerous technological approaches to utilizing plastic wastes of varying qualities and types. A major problem with these technologies, however, is the unacceptable contamination levels in the available wastes. This paper examines one area from which relatively uncontaminated plastic wastes can be obtained—shredder residue from automotive shredder operations. In addition to reviewing the historical adoption of shredders, this paper uses econometric approaches to investigate the extent to which the shredder technology has penetrated the market for scrap steel. These approaches suggest that the movement toward shredders and away from the more conventional baler operations that have historically been used to process retired autos is slowing.     

Recycling consumer solid waste: A commentary on selected channel alternatives

The recycling of consumer solid waste presents special problems for reverse marketing channels. Specifically, the accumulation of bulk quantities of homogenous materials from consumer-generated sources that are highly heterogenous in nature represents a major functional problem that must be overcome through the development of appropriate reverse marketing channels. In this article, factors influencing reverse channels development are outlined, and specific marketing implications concerning the three basic channel types that primarily handle consumer solid waste are discussed.     

Get Ready for Innovation by Invasion

From many years of field research in West Germany and the United States, and especially from a recent study of relatively mature firms in Ohio, Gerhard Mensch has become aware of the disruption caused by the invasion of industries by new technologies from the outside. He sees the frequency of these invasions increasing in coming years for reasons that go beyond technological matters to the pressures for change coming from the capital markets. In this Perspective , he suggests the invasions can be countered and the capital markets satisfied by giving a more prominent role to the innovation manager in the strategy development process.     

柳州螺丝岭柳江特大桥悬臂施工工艺研究

文章结合柳州螺丝岭柳江特大桥介绍了大跨度预应力刚构－连续梁的悬臂施工工艺，可为其他类似桥梁的施工提供参考。