循环经济的本质与我国发展循环经济的路径选择

本文从循环经济的基本理论入手,探讨了循环经济概念的渊源,指出循环经济是一种全新的发展模式,并且论述了发展循环经济的必要性,分析了中国发展循环经济面临的问题,最后提供了推进循环经济的路径选择:加大宣传发展循环经济的重要意义;不断调整和优化产业结构;建立和完善循环经济政策和体制;为循环经济发展提供有力的技术支撑;探索建立绿色国民经济核算体系;加强国际合作,追踪先进理论和科技等八项措施.     

退耕还林对延安地区农业经济的影响

对延安地区11个农业县退耕前后耕地/播种总面积、种植业结构、农业投入、粮食、油料产量与单产量以及农民年均纯收入的变化进行了研究,探讨了退耕还林对延安地区农业经济的影响及其作用机制。退耕还林优化了农村的种植业结构与产业结构,全面带动了农村经济的发展。但仍然存在着一些亟待解决的问题,并给农村经济带来了一定的负面影响。     

未来三十年我国及省际人口变动趋势

分析了我国人口的变动特点,并对未来三十年我国及省际人口的变动趋势作了预测,论述了我国未来人口的空间分布变动特点。     

岷江上游生态重建的模式

本文在分析岷江上游干旱河谷区生态环境问题的基础上，阐述了该区生态退化是脆弱的自然生态环境和人类的不合理经济营活动综合作用的结果，指出生态恢复与重建必须与经济建设紧密结合，走生态经济发展之路，将岷江上游干温河谷区划分为干旱河谷粮果林生态我，中山，亚高山林药菌生态林业区，高山灌丛草甸，草甸生态特业区，并提出了不同的生态经济类型区的生态恢复与重建模式，最后，论述了生态恢复与重建的工程措施，生物措施及管理措施。     

黄土高原开发生态旅游前景看好

现代旅游业被视为促进经济发展的推动力，应成为黄土高原地区的先导产业，生态旅游应成为优先发展的旅游项目，本文概述了生态旅游的原则，特性和实质及在黄土高原地区开发生态旅游的必要性前提下，将黄土高原分为12个旅游区，指出黄土高原地区发展生态旅游的不足之处并提出应对策略。     

Inter-enterprise arrears in economies in transition

In the context of economies in transition, the paper argues that an excessive liquidity squeeze could throw the economy into a persistent state of low economic activity. In such bad equilibrium, enterprise transactions become largely demonetized, with a chain of arrears, a form of involuntary credit, spreading over the entire system. The empirical analysis of the Romanian experience seems to support the view advanced in the paper.     

武汉市制造业吸引外商投资对策研究

本文在课题组对武汉市制造业吸引外商投资的现状调查、对国内外吸引外商投资的经验和教训的总结以及对国际资本流动特点和趋势分析的基础上,提出了武汉市制造业吸引外商投资的若干政策建议,其内容包括:提高武汉市整体经济发展水平;领悟WTO规则,转变政府职能;提升武汉市制造业产业集聚能力;为招商引资创造各种条件;注重对吸引外资的管理等等.     

The hidden value of air transportation infrastructure

Air transportation is a key strategic asset in that it provides access to markets and thereby enables the economic development of nations. Thus, in order to maintain their competitiveness in a global economy, countries must invest in air transportation infrastructure to ensure their ability to meet current and future demand for aviation services. The objective of this paper is to develop and illustrate a methodology for evaluating the strategic value of air transportation infrastructure, in particular the benefits associated with the ability to react quickly to changes in the market. The hypothesis is that by recognizing and taking advantage of this strategic value, it may be possible to design better policies for aviation infrastructure delivery.The methodology developed here uses system dynamics to model different strategies for infrastructure delivery. These strategies are defined by three variables: the amount of capacity increase, the time to deliver the capacity and the congestion threshold that triggers the need for capacity delivery. Monte Carlo simulation is used to take into account multiple sources of uncertainty. The model shows that a strategy of capacity delivery based on small increments and short response times can yield more benefits than strategies that consider large capacity increases and long response times. Furthermore, in the specific airport example considered here, it was found that a congestion threshold of 75% should be the trigger for capacity enlargements if strategies based on small capacity increments and 1 or 5 years to increase capacity are considered. The lesson for decision-makers is that congestion delays must be addressed with foresight.     

Coupling relationship between environment and economyof metropolis：a case study of Chongqing, China

City is a coupling system of economy, society and environment. The urban environment is a supporting systemto the sustainable development of city. Taking the urban area of Chongqing as an example, this paper establishes theindicator system for assessment of the coordination between urban environment and economy according to the resultfrom principal component analyses by software SPSS11.0. Meanwhile, the weight was assigned for each indicator basedon the load of the first proper principal components. Through computation of the coordinated development model set upaccording to the knowledge of statistics, the paper draws the conclusion that the situation of the coordination betweenenvironment and economy in Chongqing developed well from 1996 to 2004. Finally, countermeasures for the coordina-tion in the coming years are proposed.     

湖南产业集群化发展模式研究

产业集群作为某一产业领域关联的企业及其支持系统在一定地域内集聚并形成具有持续竞争优势的经济群落,已经成为当代世界经济发展的一大趋势。湖南作为中部地区的一个重要组成部分,要实现在“中部地区崛起”中的快速发展,就必须形成一批在全国有强大竞争优势的产业集群。通过对产业群发展现状与特征阐述,分析了湖南现有的四大产业群发展模式及其特征,指出了产业群发展中存在的主要缺陷和不足,并提出了相应的发展对策和措施。