国债发行规模与GDP和财政支出的关系

国债作为政府筹集资金、缓解财政压力和实施宏观经济调控与现代金融管理的重要工具,适当的国债政策是实现财政政策和货币政策调控目标、促进经济增长的重要手段与保证。我国国债的发行对支持经济的发展起到了重要的促进作用。要优化国债结构,实现国债结构进一步的合理化,就需逐步扩大地方政府债券发行规模,规范国债市场运行,调整国债投资规模与方向,促进我国经济长期稳定发展。     

The Changing Nature of Border,Scale and the Production of Hong Kong's Water Supply System since 1959

This article investigates the making of Hong Kong's water supply system since 1959. It starts by assessing the perspectives provided by the regime approach and the political ecology literatures. The case of Hong Kong brings in ideas from border studies and draws attention to the changing nature of the border to explain socio‐ecological and scaling interactions. The case study maps the border relationship between China and Hong Kong (and Britain), and the political tussle between them over the control of water supply to the city in the late colonial period 1959–78, which resulted in the creation of a localized self‐sufficient water supply system in Hong Kong, and the consolidation of Hong Kong's scale as a colonial city‐state under British rule. It further explicates the change in the nature of the political border since 1979, and the processes by which Hong Kong abandoned attempts to strengthen its local supply, becoming dependent on supply from the regional Dongjiang water networks, as well as the transformation of its scale to become a subordinate of the larger political unit in subsequent years.     

太湖流域排污权交易制度框架设计

以行政区划为单元的水环境管理体制是造成太湖流域水污染加剧的重要原因之一。排污权交易制度是污染治理的有效手段,水环境的治理应该以流域为单元,充分利用市场机制配置水资源,构建覆盖整个流域的排污权交易市场。本文从法规政策、监测技术、市场潜力和试点经验等方面分析了太湖流域实施排污权交易的有利条件。在此基础上,构建了由排污权交易一级市场和二级市场组成的流域排污权交易制度。     

Performance Contracting In Practice: Experience and lessons from the water sector in Ghana

This article provides some insights into how performance contracting works in practice in a developing country context, using the case of the Ghana Water and Sewerage Corporation (GWSC). Performance contracting has been a useful instrument for restructuring the state-owned enterprises (SOE) sector in Ghana, and the GWSC has made some moderate improvements since its introduction. However, the article highlights some of the institutional constraints and capacity issues that reformers will have to pay attention to, including overstretched capacity of the monitoring agency, a weak information management system and inconsistent compliance to contract by government. The findings also highlight the difficulty of separating politics from operational/management issues, especially in politically sensitive public services, yet performance contracting relies on such separation to be effective. Also it shows how informal behaviour undermines the formality of performance contracting.     

An empirical investigation of water consumption forecasting methods

Many regions on earth face daily limitations in the quantity and quality of the water resources available. As a result, it is necessary to implement reliable methodologies for water consumption forecasting that will enable the better management and planning of water resources. This research analyses, for the first time, a large database containing data from 2 million water meters in 274 unique postal codes, in one of the most densely populated areas of Europe, which faces issues of droughts and overconsumption in the hot summer months. Using the R programming language, we built and tested three alternative forecasting methodologies, employing univariate forecasting techniques including a machine-learning algorithm, with very promising results.     

水利与生态环境

本文以实例说明水利建设中缺乏生态环境意识会出现的弊端,提出水利建设的规划、设计、施工、管理全过程都应按生态经济环境水利模式来搞,使我国水利工作进入生态经济环境水利化阶段。     

Water as an investment: liquid yet illiquid!

The water industry is in great need of further large investments to address existing severe water shortages worldwide which requires the participation of private sector investors. This industry is heavily infrastructure based and is therefore saddled with fixed assets-in-place or illiquid assets. This exposes the industry to what is termed as ‘illiquidity risk’, and hence, investors in this industry should be compensated for bearing this risk with an appropriate return premium (i.e. extra return). In this study, we provide evidence as to whether illiquidity risk indeed significantly affects returns in this industry. We examine the case of all 76 firms that compose the five major global water indices. After controlling for other factors that impact on returns, our results suggest that asset illiquidity is positively associated with stock returns. Specifically, water firms with a larger proportion of illiquid assets-in-place are observed to have greater stock returns than those with a smaller proportion of illiquid assets. Our results have important implications for the financing of water-related projects particularly those which involve the participation of investors from the private sector.     

Order release planning with clearing functions: A queueing-theoretical analysis of the clearing function concept

We consider the problem of planning future order releases in hierarchical production planning and control systems. An established research direction is the clearing function concept: the planned material flow through a production unit is modelled by inventory balance equations for WIP and final products, and the consequences of the stochastic properties of the material flow are modelled by clearing functions, which is the functional relationship between the level of WIP and the maximum output of a work centre in a period.Using a transient M/M/1 model, our paper shows that the usual definition of a nonlinear clearing function suffers from substantial shortcomings concerning both the definition of the function and empirical estimation of its parameters. We propose an alternative transient clearing function and derive a procedure for its parameterization.