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101.
JiYoung Park JoongKoo Cho Peter Gordon James E. Moore II Harry W. Richardson SungSu Yoon 《Journal of Transport Geography》2011,19(6):1410-1422
The state of the nation’s infrastructure is the subject of widespread discussion and comment because it is thought to include many deteriorating and unsafe bridges. Ever since the terrorist attacks of 9/11, there has been increasing concern over the extent to which an attack on infrastructure could result in serious economic disruption. This research develops a model to analyze the economic consequences of an attack on a major element of the highway network. We add a freight network to a national multiregional economic impact model and make freight traffic flows endogenous. The use of a sub-national interstate model recognizes that most infrastructure planning is at the state level and most political leaders’ interest is local. We base our approach on the National Interstate Economic Model (NIEMO) and refer to an elaboration that we name Transportation network and the National Interstate Economic Model (TransNIEMO). The new model enables us to study the state-specific and industry-specific economic impacts of some significant changes in the nature of highway freight movements. We tested the model for selected freight movements in and out of California. The results are entirely plausible and encourage us to elaborate and test the model for hypothetical disruptions of freight traffic throughout the US. 相似文献
102.
rtomir Rozman Majda Poto
nik Karmen Paek Andreja Borec Darja Majkovi
Marko Bohanec 《Tourism Management》2009,30(5):629-637
Farm tourism is a significant means of supplementing farmers' incomes. This paper presents a methodology for ranking tourist farms by using a multi-criteria model based on the qualitative multi-criteria modeling methodology, DEX, to assess service quality. The software tool DEXi was used to achieve this end. The model was then applied to seven tourist farms with data derived from questionnaires completed by tourist farm operators and guests. The results are shown as service quality assessments for individual farms. The potential of the model for assessing the farms is demonstrated with the aim of providing a comprehensive explanation and justification of the assessment technique. It also indicates potential improvements that farms can make through “what-if” analysis and visualization. Despite limitations, such as use of qualitative data only, the approach is proposed as being both appropriate and advantageous when compared with other means of ranking enterprises. 相似文献
103.
《Journal of Global Marketing》2013,26(3-4):93-132
Abstract Market orientation has been considered a key factor in successful business operations across different markets. To test this assertion, the authors examine the influence of a firm's market orientation on small business performance in the Chilean retail environment. They go on to report empirical information about the characteristics of the market-oriented retailers in Chile. The Kohli, Jaworski, and Kumar (1993) MARKOR scale is used in the study to assess the market orientation in the context of a developing country environment. Data for the study were collected from small retailers in Chile through self-administered questionnaires using a drop-off/pick-up method. The results show a significant correlation between market orientation and small business performance. Path analyses found that the best structure among the Market Orientation dimensions is: Intelligence Generation→ Intelligence Dissemination → Responsiveness. Moreover, these performance measures differed significantly among the three different partitions obtained using a k-means cluster analysis. The findings indicate that the MARKOR scale is both valid and reliable in a diverse Chilean small business environment. 相似文献
104.
随着汽车工业的发展,传统的陆路运输方式存在陆路运输车体形庞大、挤占高速公路资源、容易造成道路交通堵塞等诸多劣势,而采用海运方式能降低运输成本。文章介绍了某微型客车前部海运钩的设计过程,在前期总布置已完成的不利情况下,运用UG软件和CAE分析软件成功设计出符合工艺、间隙、强度及安装要求的前部海运钩。 相似文献
105.
Wolfgang Koller 《Economic Systems Research》2010,22(3):237-261
Outsourcing and trade integration of advanced countries is debated with respect to employment effects, in particular for low educated workers – at least in relative terms. We study the employment effects – differentiated by educational attainment levels – of changes in the patterns of trade integration and outsourcing in the Austrian economy over the periods 1995–2000 and 2000–2005 using hierarchical decomposition analysis based on deflated input–output tables. Outsourcing is modeled as changes in the shares of domestically produced intermediates in total intermediates. A similar decomposition of the final demand vector allows us to draw conclusions on the overall employment effects of trade integration. The results suggest that the expected negative employment effects of outsourcing and rising import penetration have been overcompensated by increasing exports. Thus, the overall employment effects of Austrian trade integration have been positive for all educational attainment groups. However, whereas the total effects have been strongest for medium and high educated workers over the period 1995–2000, employment of low educated workers have been strongest and positively affected over the period 2000–2005. This pattern can be explained by a more sluggish export performance together with stronger negative effects of outsourcing and import penetration in medium and high-skill intensive products. 相似文献
106.
JENS H. E. CHRISTENSEN JOSE A. LOPEZ GLENN D. RUDEBUSCH 《Journal of Money, Credit and Banking》2010,42(Z1):143-178
Differences between yields on comparable‐maturity U.S. Treasury nominal and real debt, the so‐called breakeven inflation (BEI) rates, are widely used indicators of inflation expectations. However, better measures of inflation expectations could be obtained by subtracting inflation risk premiums (IRP) from the BEI rates. We provide such decompositions using an affine arbitrage‐free model of the term structure that captures the pricing of both nominal and real Treasury securities. Our empirical results suggest that long‐term inflation expectations have been well anchored over the past few years, and IRP, although volatile, have been close to zero on average. 相似文献
107.
数学建模课程的开设架设起学生已有知识和实际问题的解决之间的一道桥梁,强调培养学生主动发现问题、分析问题、与人合作共同探索的能力。这一思想与建构主义学习理论是相通的。在具体教学方法上采用建构主义学习设计构建良好的课堂学习环境,可以更好的达到数学建模课程的教学目标。 相似文献
108.
利用实验室熔融沉积快速成形机FDM200mc,以鼠标的三维设计为蓝本,系统展示了鼠标从电脑屏幕到实体模型的全部过程,完整体现CAD/CAM技术。同时在实验基础上对工艺参数设置(分层厚度、支撑方式、支撑角度)等进行详细解析。 相似文献
109.
A Benchmark Approach to Filtering in Finance 总被引:1,自引:1,他引:0
Eckhard?PlatenEmail author Wolfgang?J.?Runggaldier 《Asia-Pacific Financial Markets》2004,11(1):79-105
The paper proposes the use of the growth optimal portfolio for pricing and hedging in incomplete markets when there are unobserved
factors that have to be filtered. The proposed filtering framework is applicable also in cases when there does not exist an
equivalent risk neutral martingale measure. The reduction of the variance of derivative prices for increasing degrees of available
information is measured.
1991 Mathematics Subject Classification: primary 90A09; secondary 60G99; 62P20
JEL Classification: G10, G13 相似文献
110.
This paper examines the impact that a currency target zone has on short-term interest rates. For a number of countries in the European Monetary System, we characterize the short rate using a regime-switching model that allows for a differently parameterized mean-reverting square-root process in each regime. We find that the volatility, the level, and the speed-of-adjustment are all higher in the regime that is operative during speculative attacks and currency crises. Moreover, we allow the conditional probability of being in each regime to be state-dependent so the model can be used to examine questions relating to the likelihood of realignments and the stability of the target zone system. 相似文献