Awareness as a foundation for developing effective spatial data infrastructures

The development of an effective spatial data infrastructure (SDI) often occurs in a fragmented organizational environment requiring a high level of inter-organizational collaboration. Different organizations from various jurisdictions need to work together closely when agreeing on how they will jointly register, store, use and share data and how they will make their data available to the wider society. However, this collaboration is generally regarded as very difficult. For example people often resist data sharing across organizational boundaries due to loss of control, power and independency. Organizational issues are thus considered one of the fundamental constraints to inter-organizational sharing of spatial data.     

我国丝绸之路经济带物流设施效率分析--基于DEA 模型的M almqusit指数方法

“道路联通”既是实现丝绸之路经济带“贸易畅通”的基础保障,也是实现“民心相通”、“货币流通”和“政策沟通”并最终实现区域经济一体化和社会文化融合的助推器。采用DEA模型的M almqusit指数分析法对我国丝绸之路经济带物流设施效率进行了分析。分析得出结论：贸易环境负向变化是造成我国丝绸之路经济带交通基础设施效率下降的主要原因;提高经济带物流设施对经济的贡献不应只关注新增交通基础设施,更应关注现有物流设施的运营效率;为提高经济带交通基础设施的整体效率,今后交通基础设施建设的区域结构应倾向于陕西、江苏、山西、安徽等仍存在物流设施规模效率的省份。     

Methodology to calculate the carbon footprint of household land use in the urban planning stage

The growing concerns of climate change require implementing measures to quantify, to monitor and to minimize greenhouse gas (GHG) emissions. Nonetheless, most of the measures available are not easy to define or execute because they rely on current emissions and have a corrective character. To address this issue, a methodology to characterize GHG emissions that allows implementing preventive measures is proposed in this paper. The methodology is related to household urban planning procedures and considers urban infrastructures to characterize GHG emissions and to execute preventive measures based on sustainability design criteria. The methodology has been tested by applying it to a set of medium-sized municipalities with average GHG emissions from 6,822.32 kgCO_2eq/year to 5,913.79 kgCO_2eq/year for every residential unit. The results indicate that the greatest pollutant source is transport, especially in the issuance of street network design, followed by gas and electricity consumption. The average undevelopable land area required for the complete GHG emissions capture amounts to 3.42 m² of undevelopable land for every m² of urbanizable land and 9.02 m² of undevelopable land for every m² of built land.     

欧盟大型科研基础设施概述及政策走向

欧盟研究区建设的主要目标是统筹科技优势资源,集中一切力量为当今世界面临的经济社会挑战提供科技与创新解决方案。科研基础设施是其重要组成部分,为跨成员国和跨不同区域的科技人员提供高效的联合研究平台,创造研发创新机遇,促进知识积累与经验共享。本文对欧盟及其成员国科研基础设施建设状况及其未来发展路线图进行总体研究,就其建设与运行的管理结构、资金投入、法律安排、程序运作、评估方式、国际合作,以及未来政策走向进行系统分析,为我国的大型科研基础设施和创新体系建设提供有益的线索和经验借鉴。     

基础设施建设、交易成本与经济增长

通过建立内生经济增长模型,讨论了基础设施作用于经济增长的机制：一部分有效降低了生产和消费过程中的交易成本,另一部分则直接提升人们的福利水平。藉由此机制的作用方式,模型得出了最优的基础设施投入量和与之对应的最大化经济增长率。利用模型的逻辑关系和实证分析中的相关数据,文中对我国历年可能的最优经济增长率进行了数值模拟,该模拟的结果显示出近15年来政府的工作效率和执政水平有了快速的提高。     

Development of a methodology for the characterization of urban and periurban green spaces in the context of supra-municipal sustainability strategies

Periurban landscapes should be interpreted as multifunctional spaces enabling them to be valued according to environmental, economic and social criteria. This article proposes a methodology for the characterization of urban and periurban green spaces in the context of strategies which enable planning processes for cities of the future to be devised. Firstly, the green belt is characterized and evaluated and its resilience and dynamic analyzed. Subsequently, different supra-municipal tools are compared and a summary of various existing methodologies and programs is produced, making it possible to develop a matrix for diagnosing projects for green spaces and periurban natural spaces and evaluating their potential as a Green Infrastructure in the context of Open Space Strategies. The application of this method in the characterization of periurban space emphasizes elements of scenic beauty whose incorporation in the said strategies does not require large investments but instead an effort in terms of promoting such places. The drafting of this Open Spaces Strategy offers a cross-disciplinary planning tool with which to take action using a landscape reading scale. This comprehensive view makes it possible to optimize efforts and investments and involve the whole community at all levels of operation through processes of citizen participation. As a result, a systematic and collective diagnostic tool is obtained for characterizing the urban and periurban green belt, which can be applied to the various periurban spaces in accordance with the multifunctionality demanded by supra-municipal strategies.     

我国“一带一路”基础设施投资效率对经济增长方式转变的空间效应分析

基础设施投资效率是有效实施供给侧改革以及顺利进行“一带一路”战略工作的根基,是经济增长方式转型升级中重点关注和解决的问题。本文基于2003～2014年的面板数据,借助DEA方法和空间杜宾模型,对比分析全国与“一带一路”国内段沿线地区硬软性基础设施投资效率及其对转变经济增长方式的本地效应与空间溢出效应。研究结果表明：“一带”的硬性基础设施投资,“一路”的软性基础设施投资呈现较高的技术效率水平;区域经济增长方式转变呈鲜明的空间依赖性;与全国比较,硬软性基础设施投资效率对“一带一路”的经济增长方式转变具有显著的促进作用。硬性基础设施投资效率对“一带”沿线的效应较大,尤其是对西北地区产生的本地和溢出效应最大;软性基础设施投资效率最明显促进“一路”沿线的集约化水平及带来显著的积极外溢效应。     

The causal relationship between equipment investment and infrastructures on economic growth in China

There is agreement in the literature on economic growth concerning the transitory effects of capital accumulation on the process of economic development. However, controversy arises if this effect is permanent. In this sense, the key point is the embodied technological progress and whether supply factors predominate among the determinants of capital accumulation. Only in this case should expect long-run effects of capital accumulation on economic growth. Inspired by this idea, I focus the study on two elements accounting for economic development—equipment investment and productive infrastructure and I also analyze the type of the empirical relationship that exists between them. The results indicate that equipment investment and infrastructures have played a significant role in accounting for long-run growth in China. However, I do not find empirical evidence supporting any relationship between the two types of investment. In addition, I find that foreign trade has stimulated output and equipment investment in the long run. Finally, it is found that innovation activities encourage equipment investment in the long run.     

基础设施产业市场化改革的公共风险及其控制

基础设施产业市场化改革可能带来的公共风险包括体制与政策风险、公共安全风险、国家经济安全风险、社会安全风险、规制风险。可以考虑从改革政府行政管理体制、健全相关的法律制度。完善改革的配套经济政策和加强公共监督三个方面予以控制;同时,为顺利推进我国基础设施市场化改革,必须由相对独立的综合机构制定、实施改革方案,要坚持总体同步配套,渐进分步实施原则,构建基础设施产业改革的利益均衡博弈机制。     

Nexus between telecommunication infrastructures,economic growth and development in Africa: Panel vector autoregression (P-VAR) analysis

This study examines the causal-effect relationship between telecommunication infrastructures, economic growth and development in selected African countries. It further estimates the trivariate impacts of telecommunication infrastructures, economic growth and development in the region. The analysis considers a panel of forty-six African countries from 2000 to 2015. To measure economic growth, real gross domestic product serves as the proxy, while economic development is measured by the Human Development Index, and telecommunication infrastructures by a composite index of telecommunication computed from mobile line, fixed line and internet access penetration via principal component analysis (PCA). The empirical results suggest the existence of a bidirectional long-run relationship between telecommunication infrastructures, economic growth and development. The causality tests reveal that there is feedback causality between telecommunication infrastructures, economic growth and development. Telecommunication infrastructures promote economic growth and development in Africa and vice versa. Thus, there is need to promote inclusive and holistic policies that will enhance digital provide, economic growth and development simultaneously in Africa. An increase in telecommunication infrastructures will encourage aggregate output and standard of living to move in the same direction in Africa.