人民币升值影响我国企业竞争力实证研究

2005年7月汇率改革以来,人民币持续升值,对我国外向型企业的进出口有较大影响。尤其是对作为国民经济支柱产业的汽车行业影响深远,而汽车零部件的进出口额远远多于汽车整车,因此本文选择41家汽车零部件上市公司作为研究对象,通过对相关的面板数据进行检验和回归分析,从而研究人民币升值对于企业竞争力的影响。研究结论表明,人民币升值对企业盈利能力以及营运能力有显著正影响,而对企业成长能力没有显著影响。     

Alliance portfolio diversity and firm performance

In this paper, we offer a comprehensive alliance portfolio diversity construct that includes partner, functional, and governance diversity. Grounding our work primarily with the resource‐ and dynamic capabilities‐based views, we argue that increased diversity in partners' industry, organizational, and national background will incur added complexity and coordination costs but will provide broadened resource and learning benefits. Increased functional diversity results in a more balanced portfolio of exploration and exploitation activities that expands the firm's knowledge base while increased governance diversity inhibits learning and routine building. Hypotheses were tested with alliance portfolio and performance data for 138 multinational firms in the global automobile industry during the twenty‐year period from 1985 to 2005. We found alliance portfolios with greater organizational and functional diversity and lower governance diversity were related to higher firm performance while industry diversity had a U‐shaped relationship with firm performance. We suggest firms manage their alliances with a portfolio perspective, seeking to maximize resource and learning benefits by collaborating with a variety of organizations in various value chain activities while minimizing managerial costs through a focused set of governance structures. Copyright © 2010 John Wiley & Sons, Ltd.     

区域耕地数量变化预测方法的对比研究

研究目的:对区域耕地数量变化预测方法进行对比分析,科学合理确定区域耕地数量。研究方法:通过Pearson相关分析法筛选影响耕地变化的关键因子,利用改进的BP神经网络算法、灰色模型和多元线性回归模型法对费县耕地数量变化进行预测。研究结果:改进的BP神经网络算法相对传统的灰色模型和多元线性回归模型等预测方法具备较高的预测精度。研究结论:改进的BP神经网络算法是进行耕地数量变化预测的较好方法,具有实际指导意义,其预测结果可以为当地相关部门合理地确定耕地保有量、推进耕地保护提供科学依据。     

我国出口补贴转变为技改补贴的有效性分析

文章探讨了本国企业与外国企业在以产量竞争的方式争夺出口市场的情况下,本国政府对本国企业技改投资进行补贴的理论依据。通过两次运用两阶段博弈,文章对由补贴政策、企业技改投资、产量和利润水平决定构成的三阶段博弈进行了因果关系的比较静态分析,认为在一般情况下,对本国企业技改投资补贴有利于本国企业在国际市场中产量、市场份额和利润的增加,也有利于本国社会总福利水平的增加,对外国企业产量、利润和社会福利则形成负面影响。这一政策可接替在未来实施中具有不确定性的出口补贴政策。     

Optimal money supply in models with endogenous discount factor

This paper studies the Friedman rule for the optimal quantity of money in money in the utility (MIU) and cash–credit models while considering two specifications for the endogenous discount factor. In the first specification, the discount factor depends directly on the utility level. In the second, the discount factor depends on every component of the utility function. We show that under the former specification the Friedman rule is the optimal policy. Under the latter, however, while the Friedman rule is optimal for the MIU model, it is not optimal for the cash–credit model.     

公园游步道设计提升健步功效的研究 ——以南京鱼嘴湿地公园游步道设计为例

以设计提升公园游步道健步功效为目标,研究包 括：1)Meta分析合理健步量,提出推荐优化公园游步道一 周健步量组合方案：每周5~7d、中强度、200~300min, 以3.5km慢走、1/1.5/4km快走、3.5/4km慢跑为模数单 元;2)根据所识别的游步道景观要素与健步功效关系,提出 连续度、缓弹度、平整度、美感度4个主客观结合的评价标准 及其指标;3)据此评价游步道的各类健步功效,结果显示塑 胶跑道主路最能提升慢跑功效;东西侧游园主路、平行跑道的 南侧木栈道连续度较强、缓弹度较好、美感度较高,最能提升 慢跑、快走类健步功效;夹江岸边的大部分木栈道因连续度较 强、美感度较高,能提升快走、慢走功效;其余路径更能提升 慢走功效,但部分转折过多、砂砾铺装的道路,健步功效不显 著;4)基于公园游步道一周健步量组合方案与健步功效评价 结果构建最佳健步功效游步道递归模型,根据“组合距离模数 原则”“运动路径连接原则”和“安全舒适多样原则”,模型 运算与人工筛选结合,优选出最能提升健步功效的鱼嘴公园游 步道一周健步路径组合,经试验证明有效。     

Inventory model for an inventory system with time-varying demand rate

The standard inventory problems of the multi-period have been modeled under different situations. Specifically we have considered the demand subjects of a continuous distribution and a discrete distribution, and whether the demand of each period is unchanged or not. A method to get an economic order quantity in inventory systems with discrete and unchanged demand was presented in a previous paper, and this method has been generalized to an inventory model with varying continuous demand. However, it was not achieved due to there being many classified cases in the general situations. In this article the above method is discussed in the case discrete demand to determine whether it increases or decreases from period to period. A theoretical method is presented by using previous results and some examples are given which suggest how the concept can handle on inventory system. In order to make the decision, an algorithm is also presented under some conditions, and examples are shown by using the computer software program, Mathematica, which helps to explain the findings. In general cases, we view the optimal policy in the inventory problems in only a few periods.     

工伤保险费明示列入规费的意义浅析

针对《建设工程工程量清单计价规范》中规费项目的列项组成和有关条文说明,探讨了工伤保险的性质及其相关法律条文,同时结合建设工程行业的具体特点和各地方关于工伤保险费的实践操作,将危险作业意外伤害险与工伤保险进行对比对比,论述了在《建设工程工程量清单计价规范》中明示列入工伤保险费具有重大的法律意义与社会意义,指出了在规费项目中明示列出工伤保险费的重要性与必要性。     

广西电子废弃物产生量预测

目前对电子废弃物的回收、处理和资源化利用问题的研究己经成为全世界关注的课题。现有七种模型用于电子废弃物预测。选取市场供给A模型对广西电子废弃物产生量进行预测,并对预测的结果进行分析。预测的数据可为电子废物回收处理相关方做出科学决策提供依据。     

08清单规范下工程造价管理机构的作用探析

建设部于2008年7月9日发布《建设工程工程量清单计价规范》GB50500-2008(08规范)。本文把08工程量清单计价规范中对工程造价管理机构作用的规定罗列,并说明了工程造价管理机构应发挥的作用和措施,最后,说明了现阶段发挥工程造价管理机构作用的前提和基础。