我国弱势群体权益维护问题探析

在我国经济社会发生巨大变革的转型时期,我国社会出现了一个主要由农民、残障人群、失业人群、老年群体等人群组成的弱势群体,他们在社会、政治生活中处于不利地位,权益受到公权力和强势群体的侵害,维权之路坎坷艰辛。弱势群体是影响稳定大局的重要因素,维护弱势群体权益的主要措施有转变政府职能、完善社会制度,疏通、拓宽利益表达渠道,大力发展弱势群体组织等。     

知识溢出与高新技术产业集群的演化——以上海市张江高科园区IC产业集群为例

国内外的一些研究表明,知识溢出与高新技术产业集群的形成和发展有着密切的关系。产业集群总是处于一个动态的变化过程中,知识溢出在各个过程中所起的作用是不一样的。文章结合高新技术产业集群的生命周期理论,探讨了知识溢出对高新技术产业集群演化的影响,最后结合上海张江IC产业集群的案例加以说明。     

货币政策对我国证券业产业结构、行为和绩效的作用主辅线分析

本文综述了政策与我国证券产业结构、行为和绩效作用路径方面的研究成果,将货币政策按照作用对象的不同分为两类,对这两类货币政策与证券业结构、行为和绩效进行格兰杰因果检验,进而提出了货币政策对我国证券业产业结构、行为和绩效的作用主辅线。     

现代化港口型城区的性质、特点及功能

港口型城区是近年来随着我国港口大规模建设和发展而日益兴盛的一种城市形态.由于大多数港口的刚性扩张,新港口、新港区建设方兴未艾,带动了港口后方的工业、商业和人口的集聚,由此形成了港口型城区,典型的如营口的鲅鱼圈、日照的石臼、上海的临港新城等.     

ARIMA计量技术下河南省农民增收的预测模型研究

笔者根据河南省1978年～2005年的农民人均纯收入统计数据,将这些数据进行平稳化、零均值化处理,并利用时间序列的自相关函数,偏自相关函数的性质,确认数据所适合的模型.通过对样本数据所做的回归拟合模型定量分析,从而为河南省"十一·五"规划提供量化指标依据.     

我国科技产业发展的多方融资问题研究

推进我国科技产业发展,必须着力解决科技产业的融资问题.在增加各级财政投入、扩大企业自筹资金的基础上,采取各种方式,完善、扩展科技产业融资渠道.建立风险补偿机制,完善各项政策,加强法律法规建设,从而营造科技产业融资的良好环境.     

Corporate Risk Management under Information Asymmetry

This paper examines the financial and operational hedging activities of US pharmaceutical and biotech firms that are subject to a high level of information asymmetry stemming from R&D investments during 2001–2006. We find evidence in support of the information asymmetry hypothesis à la Froot, Scharfstein and Stein (1993) that hedging helps mitigate the under‐investment problem. Specifically, we find that the use of financial derivatives is associated with greater firm value and that the value enhancement is larger for firms subject to greater information asymmetry and better growth opportunities. There is a synergy between financial hedging and operational hedging where the latter is used to counter product development risk. The results are robust with respect to alternative performance measures, industry‐specific growth measures, and the endogeneity problem. Our work is differentiated from existing studies that examined commodity‐based industries without addressing information asymmetry.     

辗辊式井下采油筛管的研制及应用

针对油田在用井下采油筛管防砂过程中出现的砂堵等问题,依据能量转换原理,研制出一种辗辊式井下采油筛管。辗辊式筛管既防砂又不发生砂堵,还具有穿透性和节能效果明显等特点,不仅可用于一般的采油井、含砂量大和压裂的井,还可用于污水泵的保护。     

污水管段设计流量的图论解析

针对污水管段设计流量计算中较易出现理解偏差与计算错误的问题,引入图论的方法,用节点与管段的关联关系对污水管道节点流量和管段流量进行定义并求解,明确了相关物理概念的界限,能使计算思路清晰,便于理解记忆。     

Post-SARS tourist arrival recovery patterns: An analysis based on a catastrophe theory

In 2003, the Severe Acute Respiratory Syndrome (SARS) ravaged many Asian countries. The outbreak of SARS caused a crisis in the tourism industry in many parts of Asia in that year. The purpose of this study is to examine and to compare the post-SARS recovery patterns of inbound arrivals from Japan, Hong Kong and USA in Taiwan. Taking the cusp catastrophe model as its foundation, this study proposes a well-grounded approach to understanding the nature of the recovery processes and to explaining the difference between the recovery patterns displayed by arrivals from Japan and those from Hong Kong and USA. Implications regarding tourism promotion policies are drawn from the analysis.