经济转型背景下日本贸易技术结构的演进研究——基于1960-1988年数据的实证分析

贸易结构是一国产业结构的反映,对一国产业结构也会带来一定的影响。依据经合组织的技术密集度标准,将日本的进出口商品进行分类。在此基础上,分析了日本贸易结构技术构成的演进。研究发现,战后日本的出口结构出现了持续、明显的升级,进口则集中在中技术与低技术产业。随着日本经济的发展,影响贸易结构的因素以及进出口结构之间的关联均发生了明显的变化。     

中国能源强度的空间分布与收敛研究——基于动态空间面板模型的分析

区域间的空间溢出和技术溢出效应日益显著,在进行能源强度收敛研究时不可忽略空间依赖性和时间动态性。在考虑空间维度的地理邻近性和时间维度的动态性的基础上,采用动态空间面板模型分析中国29个省区能源强度的空间分布、动态变化趋势以及收敛情况,研究表明：从中国能源强度的空间分布来看,呈现东低西高的格局,并且存在空间自相关现象;从动态趋势看,能源强度的空间自相关指数在2005年之后趋于稳定,东、中、西部的能源强度均呈现持续下降的趋势;从总体趋势来看,能源强度存在绝对盯收敛,不存在绝对届收敛,但存在显著的条件卢收敛。提高能源效率以及缩小区域能源效率差异,应充分利用空间溢出效应,鼓励能源强度低的地区的技术溢出到能源强度高的地区,从而加快全国区域间能源强度的收敛速度。     

RECOVERING PORTFOLIO DEFAULT INTENSITIES IMPLIED BY CDO QUOTES

We propose a stable nonparametric algorithm for the calibration of “top‐down” pricing models for portfolio credit derivatives: given a set of observations of market spreads for collateralized debt obligation (CDO) tranches, we construct a risk‐neutral default intensity process for the portfolio underlying the CDO which matches these observations, by looking for the risk‐neutral loss process “closest” to a prior loss process, verifying the calibration constraints. We formalize the problem in terms of minimization of relative entropy with respect to the prior under calibration constraints and use convex duality methods to solve the problem: the dual problem is shown to be an intensity control problem, characterized in terms of a Hamilton–Jacobi system of differential equations, for which we present an analytical solution. Given a set of observed CDO tranche spreads, our method allows to construct a default intensity process which leads to tranche spreads consistent with the observations. We illustrate our method on ITRAXX index data: our results reveal strong evidence for the dependence of loss transitions rates on the previous number of defaults, and offer quantitative evidence for contagion effects in the (risk‐neutral) loss process.     

价格因素对我国地区能源强度的影响

本文从能源价格和劳动力价格两个方面进一步分析价格要素对于能源强度的作用机理,分析了我国能源价格体系存在的问题,并针对存在的问题提出了相关政策建议,为更有效地控制能源强度提供一定的帮助,弥补了现有能源强度影响因素理论研究的不足。     

Barriers Inhibiting Export Performance of Small and Medium-Sized Manufacturing Firms

Abstract

This study uses a step-wise discriminant analysis to address two related questions. First, to identify those inhibiting factors perceived to be both important and difficult to counter when a firm is initiating an export program. Second, to address the criticism that the current export research has failed to differentiate between degree of importance and the level of difficulty that firm may encounter when entering foreign markets. Two-hundred and forty-two small and medium-sized Wisconsin manufacturing firms were surveyed. The findings identified three barriers perceived to be both important and difficult to overcome. However, they did not support the criticism that we must differentiate between the degree of importance and the level of difficulty.     

案例教学知识转移机理研究

随着管理学科的不断发展，管理知识的情境性与实践性日益突显，对管理学科的教学提出了更高的要求。作为一种基于案例创设情境，鼓励学生主动实践、互动讨论的教学方法，案例教学法逐渐成为管理学科教学中不可或缺的方法。本文以高校管理学科案例教学为研究对象，通过结构方程模型的实证研究方法探究了案例教学特征通过影响学习者行为从而促进管理知识转移效果的作用机理。实证研究结果表明，案例教学的情境模拟性特征既能够直接促进管理知识的转移，同时也能通过提升学习意愿间接提升管理知识的学习效果，而师生平等性特征则通过影响学〉-7意愿影响管理知识的转移效果，为高校管理学科案例教学的有效开展提供了新的理论依据。     

桥头深厚软基处理中低强度桩的应用分析

结合某桥头段桥头深厚软基处理的工程实例,探讨了低强度桩处理桥头软基的机理和设计思路。     

The relative influence of competitive intensity and business strategy on the relationship between financial leverage and performance

This study empirically investigates the effects of competitive intensity and business strategy on the relationship between financial leverage and the performance of firms. Based on a sample of US manufacturing firms, this study confirms the hypothesis that the cost of debt is higher for product differentiation firms than cost leadership firms. Furthermore, the results indicate that competitive intensity has a negative effect on the leverage-performance relationship, suggesting that competition acts as a substitute for debt in limiting manager's opportunistic behavior. These findings reinforce the need to consider moderating factors such as strategic choice and the environment in which a firm operates when investigating the effects of leverage on performance.     

要素密集型逆转与贸易获利能力提升——以中美纺织业为例

本文运用灰色聚类法并以中美纺织业为例,研究了产业生产要素密集型的逆转与贸易获利能力的提升问题。研究表明:以2000年中国制造业作为衡量标准,美国的纺织业在2003年从劳动密集型产业逆转成为技术密集型产业,而中国的纺织产业在考察期间一直为劳动密集型产业。文章进一步分析了要素密集型逆转的动因及贸易利得效应,发现在发生要素密集型逆转后美国纺织出口企业的获利能力明显大于中国,表明通过要素密集型逆转实现产业内升级是一条可行的路径选择。     

飞机发动机吊装实训平台安全性论证

以理论力学,材料力学,机械设计基础为理论依据,通过对发动机在安装状态和在吊装状态时的受力分析,计算论证了飞机发动机吊装实训平台的安全性。并且经过实践检验和无损检测的鉴定,进一步证明了飞机发动机吊装实训平台的安全可靠性。