政府间竞争影响城市土地市场化水平的双边效应研究：基于财政竞争和引资竞争的不同作用

研究目的:本文将政府间竞争划分为财政竞争和引资竞争,比较两者对城市土地市场化水平影响的大小,分析政府间竞争与城市土地市场化水平之间的关系。研究方法:基于2003—2016年全国284个地级市的面板数据,利用双边随机前沿模型测算财政竞争和引资竞争对城市土地市场化水平的影响。研究结果:财政竞争对城市土地市场化水平具有正向效应,提高了城市土地市场化水平1.61%;引资竞争对城市土地市场化水平具有负向效应,降低了城市土地市场化水平12.51%;政府间竞争总体上降低了城市土地市场化水平10.90%。时间趋势表明,政府间竞争对城市土地市场化水平的抑制作用呈现波动下降的状态。研究结论:政府间竞争降低了城市土地市场化水平。     

Using machine learning and big data for efficient forecasting of hotel booking cancellations

Cancellations are a key aspect of hotel revenue management because of their impact on room reservation systems. In fact, very little is known about the reasons that lead customers to cancel, or how it can be avoided. The aim of this paper is to propose a means of enabling the forecasting of hotel booking cancellations using only 13 independent variables, a reduced number in comparison with related research in the area, which in addition coincide with those that are most often requested by customers when they place a reservation. For this matter, machine-learning techniques, among other artificial neural networks optimised with genetic algorithms were applied achieving a cancellation rate of up to 98%. The proposed methodology allows us not only to know about cancellation rates, but also to identify which customer is likely to cancel. This approach would mean organisations could strengthen their action protocols regarding tourist arrivals.     

Efficiency evaluation of China's high-tech industry with a multi-activity network data envelopment analysis approach

This paper employs a Russell multi-activity network DEA model and divides the overall innovation process into the upstream Research and Development (R&D) process and the downstream commercialization process to appraise the innovation performance of China's high-tech industries from 2009 to 2013. This model can deal with the problems of intermediates, shared inputs and slack-based measure in a unified framework, and the result can provide policy makers with process-specific information on how to improve the innovation performance of China's high-tech industries. The main findings are presented as follows. First, the overall efficiency of China's high-tech industries still remains at a low level, which has its roots mainly in commercialization inefficiencies other than R&D inefficiencies. Second, for most provinces, their R&D efficiencies do not match up with their commercialization efficiencies. Finally, the innovative activities of China's high-tech industries should be driven by the market demand -oriented for the improvement of innovation efficiency.     

Futures of Crisis,Futures of Urban Political Theory: Flooding in Asian Coastal Megacities

Coastal megacities across Asia have experienced devastating floods in recent years. Studies project dramatic increases in populations prone to chronic flooding and potential permanent inundation of densely populated urban areas in future decades. The uncertainties presented by future flood risks disrupt prevalent state visions of globalization‐driven prosperity. The emerging reality of a shift in relationship between water and urban settlements has begun driving recalibration of power relations around a range of issues, including longstanding contestations over infrastructure delivery, housing, land rights and political representation. Flood mitigation efforts have played out in debates over displacement and eviction, and distributional concerns about the costs and benefits of these initiatives. This article develops a conceptual framework for assessing the implications of projections of flood risk for urban political theory. The article begins by identifying political contestations that emerge around the varied ways water intersects with urban processes—through dynamics of permeability, flow and drainage, aquifers and pipes, and coastal defense. It then explores how projections of the crisis of flooding have reshaped three contemporary debates in urban politics: those around property rights and the question of ‘informality’; around neoliberalization and financialization; and around the rescaling of the state. Finally, it briefly deploys this framework to examine the case of Jakarta.     

Nicaragua's Buen Vivir: a strategy for tourism development?

ABSTRACT

Although often framed as an emerging anthropocenic socio-ecological imaginary, the Latin American paradigm of Buen Vivir has provided a broad base of support for tourism development in the region. This article focuses on Nicaragua's Buen Vivir, a national development campaign entitled “Live Clean, Live Healthy, Live Beautiful, Live Well” (called Vivir Bonito, Vivir Bien) The campaign was launched in 2013 as a multi-pronged approach to integrated development in distinct areas including employment, public health, waste management, education, urban aesthetics and national pride. However, it has also had the effect of opening up opportunities for tourism development not only in the capital city of Managua but also alongside other mega-projects such as the planned interoceanic canal. This article draws upon the example of Vivir Bonito, Vivir Bien to illustrate the variety of tourism development strategies currently emerging at the intersection of a left-turn toward Socialism of the 21st Century and Buen Vivir in Latin America, on the one hand, and a post-neoliberal context in which political economic projects of the past continue to leave their mark.     

Challenges faced by world tourism cities – London’s perspective

World tourism cities perform multiple functions and exhibit various characteristics that influence tourism development within their boundaries. They are the main gateway for tourists visiting a country and their success has a direct impact on the visitor economy of that destination. London, the focus of this research, has been one of the world’s top tourism cities for many years, and a key gateway for domestic and international visitors. But despite the important role tourism plays in the economy of the city, there is limited research on the development of this activity in the capital. Using London as an exploratory case study, this paper contributes to better understanding the challenges faced by policy makers when planning and managing tourism in world cities. The adopted research method offers the advantage of gathering insightful information using multiple data collection techniques. Examining this new evidence contributes to expanding the knowledge on the particularities of tourism development in one of the top world cities, which could help policy makers in their efforts to better prepare for potential challenges faced by these complex but important destinations.     

FREE VERSUS SECOND‐BEST ENTRY IN COURNOT OLIGOPOLIES WITH FIRM‐SPECIFIC NETWORKS

This paper endogenizes the number of firms in an industry with positive network effects, complete incompatibility, and firms that compete in quantity. To this end, we compare two possibilities: free entry and second‐best number of firms (the one that maximizes social welfare). We show that with business‐stealing competition, free entry yields, in general, more firms than the socially optimal solution. In addition, we find that by the nature of the industry with firm‐specific networks, total production may be greater or lower under free entry than with a regulator; moreover, some industries attain their maximum social welfare with a monopoly.     

基于跨国并购的创新网络嵌入、网络异质性与创新质量研究

区别于现有研究通常将跨国并购视为一个“事件”研究其对并购企业技术创新的影响，基于创新网络视角，文章采用中国上市公司数据，通过关系嵌入和结构嵌入两个维度探讨基于跨国并购的国外创新网络对创新质量的影响机制。研究发现，通过跨国并购嵌入创新网络的直接联系促进了创新质量提升，间接联系和结构洞对创新质量产生了显著的抑制效应。网络异质性对基于跨国并购的创新网络嵌入与创新质量具有倒U型调节作用，在网络异质适度阶段，网络异质性正向调节基于跨国并购的创新网络嵌入的创新质量效应，在网络异质过度阶段，网络异质性具有负向调节效应。研究发现为新兴经济体企业实施跨国并购，有效嵌入国外创新网络，配置创新资源，提升创新质量，提供了有价值的参考。     

Ad hoc网络中基于多波束天线的集中式低时延调度算法

UxDMA算法是一种高效的集中式算法，是用于时分多址、频分多址和码分多址信道分配的统一算法。在UxDMA的基础上，利用多波束天线的多波束形成能力，针对低时延定向ad hoc网络提出了一种集中式调度算法——CLSM(Centralized Low-delay Scheduling Algorithm Based on Multi-beam Antennas)。CLSM通过不同时延等级限制的报文来比较着色后发送链路的优先级，优先选择高优先级链路传输。通过仿真验证了CLSM的性能：与UxDMA相比，该算法在多时延限制的发送端调度中表现出了更好的吞吐量和时延性能。     

中国数字经济空间关联网络及其影响因素分析

基于2013年和2020年29个省的数据，用因子模型测算各省数字经济发展水平，在此基础上使用修正引力模型构建数字经济空间关联网络，并深入分析此网络特征。结果表明：中国数字经济发展水平存在差异，东部地区高于中西部地区；中国数字经济空间关联网络密度不断增大；北京、山东、江苏一直是网络的重要输出省份，近年来西部地区在网络中的作用越来越明显；地理位置相邻、贸易开放度和产业结构对网络的形成有显著影响。