城市轨道交通对周边住宅价格的空间效应研究

以合肥轨道交通1号线为例,使用传统特征价格模型和空间计量模型对比分析轨道交通对周边住宅价格的影响。研究表明合肥市1号线对周边住宅的价格具有显著的增值作用,且住宅价格的空间效应显著。空间滞后模型显示住宅与轨道交通站间距离每增加1 km,住宅价格下降6.09%,低于传统模型的8.6%。这说明住宅价格的空间效应会使学者们高估城市轨道交通对周边住宅价格的增值作用,即加入空间效应影响后的研究结果更加真实、可靠。     

Inter-firm R&D collaboration within and across national borders

We set up a model to investigate the strategic aspect of a firm's incentive to collaborate in cost-reducing R&D with either a local or a foreign partner. We argue that collaboration with a foreign firm is preferred to collaboration with a local firm if the extra profits generated by a foreign collaboration exceed the additional cost of coordinating collaboration across national borders. We show that foreign collaboration is more likely the bigger the home market size of the foreign firm and, given certain conditions, the higher the international trade cost. We also show that whenever a foreign collaboration arises in equilibrium, it is efficient (i.e., world-welfare-maximising) and that there are cases where (a) a foreign collaboration would be efficient but a local collaboration emerges in equilibrium, and (b) an efficient foreign collaboration emerges in equilibrium, but one of the countries would prefer a local collaboration. We briefly consider the policy implications of these findings.     

金融集聚、购房压力对科技创新的时空影响机制:以粤港澳大湾区为例

综合考虑时间与空间两个维度,识别出影响粤港澳大湾区科技创新的关键因素,旨在促进大湾区创新资源整合和创新水平提高。基于粤港澳大湾区11个城市2006-2016年面板数据,采用面板门限模型和空间计量模型来分析区域内金融集聚、购房压力对科技创新的非线性影响机制及空间溢出效应,在此基础上比较行业异质性影响。结果显示:粤港澳大湾区金融集聚对科技创新存在显著的正向空间溢出效应,购房压力对科技创新存在一定程度的负向空间溢出效应。从整个金融业来看,大湾区内金融集聚对科技创新具有显著的促进作用,而购房压力对科技创新没有显著的统计意义上的关系。从金融子行业来看,保险业集聚对科技创新具有显著的正向促进作用,而银行业集聚和证券业集聚对科技创新均没有明显影响。金融(各子行业)集聚与购房压力的互动均对科技创新产生显著的抑制作用;金融集聚、购房压力对科技创新的统计意义上影响具有门限效应,呈现出非线性影响机制。在低、中度购房压力区域内,金融集聚对科技创新具有显著负向影响;在高购房压力区域内,金融集聚对科技创新具有显著正向影响;与此同时,在低、高度金融集聚区域内,购房压力对科技创新没有明显的统计意义上的影响;但在中度金融集聚区域内,购房压力对科技创新具有一定促进作用。地区研发投入、经济发展水平、教育水平、政府扶持政策对科技创新产生积极促进作用,但存在结构性差异。     

Trade development between China and countries along the Belt and Road: A spatial econometric analysis based on trade competitiveness and complementarity

This paper empirically analyses the effect of trade competitiveness and complementarity on the trade development between China and the countries along the Belt and Road (B&R). The study first measures the trade competitiveness and the complementarity between China and the countries along the B&R by using the trade competitiveness coefficient (TCC) and the trade complementarity index (TCI). Then a spatial gravity model is constructed to analyse the effect of trade competitiveness and complementarity on trade development between China and the countries along the B&R. We use generalized method of moments (GMM) and spatial filtering technology to verify the robustness of the model. The results show that the GDP of China and the countries along the B&R, the land area of countries along the B&R, trade complementarity, common language, free trade agreements (FTA), and the B&R Initiative significantly promote the trade development between China and the countries along the B&R, whereas the geographical distance between countries and trade competitiveness significantly inhibit it. Finally, to promote the trade development between China and the countries along the B&R, the present paper puts forward suggestions including improving trade promotion policies between China and the countries along the B&R and vigorously expanding cooperation with complementary industries in the countries along the B&R to enhance trade dependence.     

Growth with many agents and wages paid ex ante

In this paper, we consider a one-sector model of economic growth with several infinitely-lived heterogeneous agents, who are endowed with diverse discount factors as well as preferences over consumption. In line with the classical Ramsey model, agents are not allowed to borrow against future income. Unlike the traditional assumption of ex post wage payment, wages are paid ex ante in our model. We first explain the difference between the assumptions of wages being paid ex ante and wages being paid ex post in the framework of a simple illustrative two-class model. Our main result shows that in contrast to the many-agent Ramsey model with ex post wage payment, the capital stock sequence converges to the steady state stock irrespective of production technology employed by the firms. Further, all impatient agents own zero capital stock, whereas the most patient agent owns the entire capital stock from some time onward. Thus, we have shown that a slight modification in the timing of wage payment in growth models can lead to significant changes in the stability properties of equilibrium dynamics.     

Convergence of the world’s energy use

This paper uses the sequential panel selection method to examine the convergence of the energy use of 107 countries. It contributes by analyzing the order of convergence and the factors affecting the difference in convergence using improved methods. We provide robust evidence to indicate that seven out of ten countries have been convergent during the period examined, and strong decoupling across countries does not exist. Additionally, high-income and upper-middle-income countries show convergence characteristics earlier than lower middle-income and low-income countries. This means that high-income and upper-middle-income countries are the first to achieve steady-state levels by adjusting their industrial structure and adopting new technologies, and energy exporters have dominant control over energy use. We find that energy-exporting countries converge before energy importers do. These results mean that the energy use of most countries is in accordance with the convergence theory. It also shows that GDP per capita, industrialization level and latitude have great impacts on convergence, especially for industrialization. Our research provides a reference for countries around the world to adjust their energy use policies and to realize a rational flow of energy resources.     

Testing the Environmental Kuznets Curve hypothesis on land use: The case of Romania

The aim of the present study is to test empirically the Environmental Kuznets Curve (EKC) hypothesis for 42 Romanian counties over the 2000-2014 period. Specifically, we investigate the existence of an inverted U-shaped curve relationship between residential built-up land and economic development in a low-income EU country undergoing rapid and profound transition. We do so by making innovative use of spatial panel econometric techniques. Contrary to our expectations, the results indicate an inverted EKC, implying that higher levels of residential built-up area occur for higher levels of wealth. Moreover, we find that the built-up land in Romania mainly reflects processes of urban expansion, such as sprawl or suburbanization, that may have harmful environmental and social consequences. Spatial spill-overs in terms of built-up land arise and spread, albeit to a limited extent, to neighbouring locations. These findings are of potential significance for policy makers, because they highlight the need for coordination among neighbours. Furthermore, strengthening the institutional framework and local tax management, and planning urban regeneration better could curb and even reverse the extensive built-up land expansion and real estate speculation.     

Developing a spatial planning information package in ISO 19152 land administration domain model

Cities establish and maintain Land Administration Systems (LAS) to manage information about the land and urban space. Recognizing the importance of the urban space for sustainable development, information from spatial planning will affect land administration and vice versa. Therefore, every aspect that influences land use, both from spatial planning and land administration should be identified, documented, and standardized as they contain legally binding rules for governments and citizens. The Land Administration Domain Model (LADM), ISO standard 19152:2012, offers guidelines to ensure interoperability in the representation of Rights, Restrictions, and Responsibilities (RRRs). LADM is also capable of standardizing multi-dimensional representation, including the temporal capability for documenting and visualizing all legal aspects of land use or space. This paper discusses how to construct interoperable information between the spatial plan and land administration. We present the standardization of spatial planning information and land administration as subsets of land-related information. The paper proposes the development of a spatial planning package within the existing LADM standard.     

A technical solution for 3D crowdsourced cadastral surveys

The development of 3D property registration systems is indispensable for the spatial determination of property Rights, Restrictions and Responsibilities (RRR), the sustainable operation of property markets and the safeguarding of ownership in the highly urbanized world. Several developments in computer graphics, 3D modelling and rendering techniques have attracted the growing global interest in 3D cadastre. Since 2012, the Land Administration Domain Model (LADM ISO 19152) is adopted as the international standard for 2D and 3D cadastral data modelling. Developed legal procedures and prototype systems for 3D property rights registration provide interesting solutions for data acquisition and visualization but such approaches are time and cost demanding. In parallel, 2D cadastral surveying procedures have progressed significantly in reducing required time and cost, utilizing crowdsourcing methodology and mobile services.This paper presents a technical solution under development, aiming to provide the beginning for a new era in the initial acquisition, registration and representation of 3D crowdsourced cadastral data, appropriate for both the developed and the developing world. The proposed solution consists of two complementary parts, the technical framework and the crowdsourced methodology to be followed. The technical framework consists of two interconnected parts, the server-side and the client-side. The server-side refers to the Database Management System (DBMS) where the collected data are stored. The client-side refers to the data capturing tool, which in this case is the mobile device. For the server-side, a prototype system based on model driven architecture practices and LADM is developed; while for the client-side, an open-source mobile application for the acquisition of 3D crowdsourced cadastral data, 3D modelling and visualization of 3D property units as block models (LoD1) on a mobile’s phone screen in real-time, is developed.This research is focused on investigating technical aspects for capturing and integrating data about legal rights on physical objects. Detailed investigation of legal issues is not within the objectives of this research. Two case-studies for testing the proposed technical solution are made. An assessment of the current stage of development of the technical solution is presented. The main conclusions converge that the proposed technical solution has huge potentials for the fast, economic implementation of 3D cadastral surveys as it can produce an accurate and reliable 3D information model, depending on the accuracy of the available basemaps. The developed application is easy-to-use as users may not have the necessary level of 3D modelling skills in order to contribute to the registration procedure.     

Tourism-driven rural spatial restructuring in the metropolitan fringe: An empirical observation

Rural spatial restructuring is regarded as an important method of achieving rural revitalization in China in recent years. With the spillover of leisure consumption demand in metropolitan areas, the rural spatial structure has undergone significant changes. To analyze the causal logic of rural spatial restructuring, this study constructs a tourism-driven rural spatial restructuring framework. Furthermore, GIS and participatory fieldwork are used to reveal the changing process of rural spatial restructuring. A case study of Qinggangshu Village shows that tourism-driven rural spatial restructuring is the result of internal and external forces, while land consolidation is highlighted as a direct way to trigger rural spatial restructuring, and rural tourism can accelerate land consolidation, and realize rural revitalization. However, for those villages without any resource endowment, simple land consolidation cannot improve the rural economy in a short period. Moreover, once rural spatial restructuring is completed, the rural economy and social culture will also be restructured. The framework demonstration results will provide a “road map” to rural spatial restructuring in metropolitan fringe areas and serve as a practical information resource for policy-makers. The driving factors of rural spatial restructuring are diverse at different stages. Therefore, the government should adopt a gradual management model, and systematically mobilize all forces to participate in rural construction to realize the sustainable development of rural areas.