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Smart Cities, Dumb Infrastructure: Policy-Induced Competition in Vehicle-to-Infrastructure Systems 智慧城市,哑基础设施:车辆到基础设施系统的政策诱导竞争
Pub Date : 2019-10-30 DOI: 10.2139/ssrn.3487084
Korok Ray, B. Skorup
The coinciding development of 5G wireless technology, autonomous vehicles, and smart city applications is creating commercial demand for vehicle-to-infrastructure (V2I) systems. In theory, roadside V2I systems and sensors could provide real-time services, such as supplementary mapping information to autonomous vehicles, traffic detection, and congestion pricing. Although federal funding of V2I systems has ramped up in recent years, federal regulators have largely retreated from their top-down design of V2I services and devices. These trends — undirected government funding and private construction of V2I applications and devices — leave state and local transportation officials with powerful discretion over the construction and design of V2I systems. We describe and anticipate the tradeoffs that lawmakers, regulators, and state authorities will face as they budget for and fund V2I roadside networks. We find that public-private partnerships likely will have greater prominence in the construction of roadside V2I networks. Finally, we apply the “policy-induced competition model” to inform when public intervention into V2I funding and design is effective. We propose regulator adoption of an open access model for long-lasting roadside assets. This “dumb infrastructure” model promotes competition and innovation in V2I while minimizing use of regulator resources and public funding of networks.
5G无线技术、自动驾驶汽车和智慧城市应用的同步发展正在创造对车辆到基础设施(V2I)系统的商业需求。理论上,路边V2I系统和传感器可以提供实时服务,例如为自动驾驶汽车提供补充地图信息、交通检测和拥堵收费。尽管近年来联邦政府对V2I系统的资助有所增加,但联邦监管机构在很大程度上放弃了对V2I服务和设备自上而下的设计。这些趋势——无定向的政府资助和V2I应用和设备的私人建设——使州和地方交通官员在V2I系统的建设和设计方面拥有强大的自由裁量权。我们描述并预测了立法者、监管者和州当局在预算和资助V2I路边网络时将面临的权衡。我们发现,公私伙伴关系可能会在路边V2I网络的建设中发挥更大的作用。最后,我们应用“政策诱导竞争模型”来告知公共干预V2I资金和设计何时是有效的。我们建议监管机构对长期路边资产采用开放获取模式。这种“哑基础设施”模式促进了V2I的竞争和创新,同时最大限度地减少了监管机构资源和网络公共资金的使用。
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引用次数: 0
How Should We Measure City Size? Theory and Evidence within and Across Rich and Poor Countries 我们应该如何衡量城市规模?富国和穷国内部和之间的理论和证据
Pub Date : 2019-09-01 DOI: 10.5089/9781513513782.001
Remi Jedwab, Prakash Loungani, A. Yezer
It is obvious that holding city population constant, differences in cities across the world areenormous. Urban giants in poor countries are not large using measures such as land area,interior space or value of output. These differences are easily reconciled mathematically aspopulation is the product of land area, structure space per unit land (i.e., heights), andpopulation per unit interior space (i.e., crowding). The first two are far larger in the cities ofdeveloped countries while the latter is larger for the cities of developing countries. In order tostudy sources of diversity among cities with similar population, we construct a version of thestandard urban model (SUM) that yields the prediction that the elasticity of city size withrespect to income could be similar within both developing countries and developed countries.However, differences in income and urban technology can explain the physical differencesbetween the cities of developed countries and developing countries. Second, using a varietyof newly merged data sets, the predictions of the SUM for similarities and differences ofcities in developed and developing countries are tested. The findings suggest that populationis a sufficient statistic to characterize city differences among cities within the same country,not across countries.
很明显,保持城市人口不变,世界各地城市之间的差异是巨大的。以土地面积、内部空间或产值等指标衡量,贫穷国家的城市巨头并不算大。这些差异在数学上很容易调和,因为人口是土地面积、单位土地的结构空间(即高度)和单位内部空间的人口(即拥挤程度)的乘积。前两者在发达国家的城市中要大得多,而后者在发展中国家的城市中要大得多。为了研究人口相似的城市之间多样性的来源,我们构建了一个标准城市模型(SUM)的版本,该模型得出的预测是,在发展中国家和发达国家,城市规模相对于收入的弹性可能相似。然而,收入和城市技术的差异可以解释发达国家和发展中国家城市之间的物理差异。其次,使用各种新合并的数据集,对SUM对发达国家和发展中国家城市相似性和差异性的预测进行了测试。研究结果表明,人口是一个足够的统计数据来描述同一国家内城市之间的城市差异,而不是国家之间的城市差异。
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引用次数: 4
Working from Home and Commuting: Heterogeneity Over Time, Space, and Occupations 在家工作和通勤:时间、空间和职业的异质性
Pub Date : 2019-08-01 DOI: 10.2139/ssrn.3449572
Duco de Vos, M. van Ham, E. Meijers
Teleworking may increase the willingness to accept a longer commute. This paper presents new evidence of the effect of teleworking on the length of commutes. We use novel panel data from the Netherlands, for the years 2008-2018, and find stronger effects compared to studies that use older data. Between 2008 and 2018 however, the effect was remarkably stable: workers that started teleworking increased their commutes by 12 percent on average. We analyse heterogeneity in the effect of teleworking on commuting across different levels of urbanization and across occupations. This study stresses the effects of teleworking on the geographical scale of labour markets, and provides important inputs for policymakers that aim to promote teleworking.
远程办公可能会增加人们接受较长通勤时间的意愿。本文提出了远程办公对通勤时间影响的新证据。我们使用了来自荷兰的2008-2018年的新面板数据,发现与使用旧数据的研究相比,效果更强。然而,在2008年至2018年期间,这种影响非常稳定:开始远程办公的员工通勤时间平均增加了12%。我们分析了不同城市化水平和不同职业中远程办公对通勤影响的异质性。这项研究强调了远程办公对劳动力市场地域规模的影响,并为旨在促进远程办公的政策制定者提供了重要的投入。
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引用次数: 14
Gender-Specific Benefits from Ride-Hailing Apps: Evidence from Uber's Entry in Chile 叫车应用的性别优势:来自优步进入智利的证据
Pub Date : 2019-04-12 DOI: 10.2139/ssrn.3370411
V. Lagos, Á. Muñoz, Christine Zulehner
In this paper we empirically assess the impact of the deployment of Uber on the incidence of drunk-driving fatal traffic accidents and fatalities in Chile. Based on observational data about accidents and the fact that Uber entered first the Metropolitan Region (Santiago), we are able to exploit differences in entry dates and availability of the service across municipalities to identify the effects of Uber’s entry by using a difference-in-differences approach. We contribute to the literature by assessing whether there is a differentiated effect between male and female fatalities and according to their role in the accident (i.e., driver or passenger). In particular, the presence of a mobility bias against women in the traditional transport sector may imply that Uber brings greater benefits for them. Our results suggest that Uber’s entry has significantly decreased the number of drunk-driving fatal accidents and fatalities, mainly during the nighttime. We show that this effect is mainly driven by a reduction in the number of female passengers’ fatalities and the number of nighttime male drivers’ fatalities in these types of accidents. The results are robust to the inclusion of different sets of controls and exposure measures.
在本文中,我们实证评估优步的部署对智利酒后驾驶致命交通事故和死亡人数的影响。基于对事故的观察数据,以及优步首先进入大都市地区(圣地亚哥)的事实,我们能够利用不同城市进入日期和服务可用性的差异,通过使用差异中的差异方法来确定优步进入的影响。我们通过评估男性和女性死亡之间是否存在差异效应以及根据他们在事故中的角色(即司机或乘客)来贡献文献。特别是,传统交通行业对女性的出行偏见可能意味着优步会给她们带来更大的好处。我们的研究结果表明,优步的进入显著减少了酒后驾驶致命事故和死亡人数,主要是在夜间。我们表明,这种影响主要是由女性乘客死亡人数和夜间男性司机在这些类型的事故中死亡人数的减少所驱动的。这些结果对于纳入不同的对照和暴露措施是稳健的。
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引用次数: 10
A Review on Congestion Control in Vehicular Ad Hoc Network at MAC Layer MAC层车辆自组网拥塞控制研究进展
Pub Date : 2019-03-20 DOI: 10.2139/ssrn.3356206
Kanchan Nahar, Swati Sharma, M. Chahal, S. Harit
Vehicular ad-hoc network (VANET) has been designed to improve traffic safety applications by enabling vehicle-to-vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication. In VANET, each and every vehicle exchanges the information among them, therefore, a high density of vehicles lead to the problem of congestion. In this context, Medium Access Control (MAC) protocols have been designed to improve the real-time communication between vehicles and roadside components with minimal transmission collision. Due to the VANET characteristics, maintaining communication at the MAC layer are the key challenges in collision control scheme. Therefore, it results in end-to-end delay and packet loss during communication. Towards the solution of these critical challenges, Decentralized Congestion control (DCC) mechanism has been innovated by the European Telecommunication Standard Institute (ETSI). This paper describes the various key challenges involved in congestion control. Also, the available solutions are described in details along with their limitations. This paper focuses on controlling of the channel load measured by DCC mechanism using different transmission parameters such as data transmission, rate transmission, power transmission and sensitive transmission.
车辆自组织网络(VANET)旨在通过实现车对车(V2V)和车对基础设施(V2I)通信来改善交通安全应用。在VANET中,每辆车之间都要进行信息交换,因此,车辆密度过高会导致拥堵问题。在这种情况下,媒体访问控制(MAC)协议被设计出来,以提高车辆与路边部件之间的实时通信,并将传输碰撞降到最低。由于VANET的特点,在MAC层保持通信是碰撞控制方案的关键挑战。因此,在通信过程中会导致端到端延迟和丢包。为了解决这些关键挑战,欧洲电信标准协会(ETSI)创新了分散拥塞控制(DCC)机制。本文描述了拥塞控制中涉及的各种关键挑战。此外,还详细描述了可用的解决方案及其局限性。本文重点研究了采用数据传输、速率传输、功率传输和敏感传输等不同传输参数对DCC机构测量的信道负载进行控制。
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引用次数: 4
Growing a Developing City: A Computable Spatial General Equilibrium Model Applied to Dhaka 发展中城市的成长:应用于达卡的可计算空间一般均衡模型
Pub Date : 2019-03-01 DOI: 10.1596/1813-9450-8762
J. Bird, A. Venables
As one of world's fastest growing cities, Dhaka faces acute challenges in housing its growing population and developing a more productive economy. Central to this is the scarcity of high-quality urban land. Yet a vast tract of land near the heart of the city, East Dhaka, currently remains predominantly agricultural and undeveloped as a consequence of flooding. This paper uses a computable spatial general equilibrium model that captures the economic geography of the city, to estimate the economic returns of coordinated action to develop this land. The model captures different productive sectors, household skill levels, and types of housing. Firms and residents choose their location within the city given the transport network and land availability, generating a pattern of commercial and residential land-use. The paper estimates the incremental impacts on income, employment and population of an embankment and other flood protection measures to protect this land, as well as from improvement in transport infrastructure and targeted support for economic development in East Dhaka.
作为世界上发展最快的城市之一,达卡在为不断增长的人口提供住房和发展更具生产力的经济方面面临着严峻的挑战。问题的核心是高质量城市土地的稀缺。然而,靠近城市中心的大片土地,东达卡,由于洪水的影响,目前仍以农业为主,未开发。本文采用一个可计算的空间一般均衡模型,捕捉城市的经济地理,以估计协调行动开发这片土地的经济回报。该模型涵盖了不同的生产部门、家庭技能水平和住房类型。考虑到交通网络和土地可用性,公司和居民选择他们在城市中的位置,从而产生商业和住宅土地利用的模式。本文估计了堤防和其他防洪措施对收入、就业和人口的增量影响,以保护这片土地,以及改善交通基础设施和有针对性地支持东达卡的经济发展。
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引用次数: 4
Design of Obstacle Detection System for an Autonomous Electric Vehicle 自动驾驶电动汽车障碍物检测系统设计
Pub Date : 2019-02-24 DOI: 10.2139/ssrn.3356272
Pratiksha B. Patil, A. Kakade
The paper represents an obstacle detection system by using LIDAR for autonomous electric vehicle. This system control a speed of autonomous vehicle and apply emergency braking if necessary also change direction of vehicle if necessary. This autonomous vehicle is fully automatic and operated by using PIC 18F4520. This vehicle is used to reduce accidents on road and also reduce a human efforts. The main aim of obstacle detection system is used for reduce accident also it is mostly used in home applications, cleaning/general robot localization and navigation, smart toys, environment scanning and 3D re-modelling etc.
提出了一种基于激光雷达的自动驾驶电动汽车障碍物检测系统。该系统控制自动驾驶车辆的速度,并在必要时应用紧急制动,并在必要时改变车辆的方向。这辆自动驾驶汽车是全自动的,由PIC 18F4520操作。这种车辆用于减少道路上的事故,也减少了人为的努力。障碍物检测系统的主要目的是为了减少事故,它主要用于家庭应用,清洁/一般机器人定位和导航,智能玩具,环境扫描和3D重建建模等。
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引用次数: 0
Does Pollution Hinder Urban Competitiveness? 污染会阻碍城市竞争力吗?
Pub Date : 2019-02-13 DOI: 10.1596/1813-9450-8739
Matthew E. Kahn, Nancy Lozano Gracia, Maria Edisa Soppelsa
This paper surveys the recent literature exploring the causes of urban pollution in the developing world and the implications of such pollution for a city's competitiveness. Within a system of cities, cities compete for jobs and people. Those cities that specialize in heavy industrial activity will gain from a manufacturing boom but are more likely to be polluted than a city that specializes in the service economy and one that makes investments in regulations to reduce the social costs of power generation, transportation, and household services. The paper explores three main questions. First, why does pollution inhibit urban competitiveness? Second, why is this effect likely to grow in importance over time? Third, why have cities been slow to adopt cost-effective regulatory strategies?
本文调查了最近的文献,探讨了发展中国家城市污染的原因以及这种污染对城市竞争力的影响。在一个城市系统中,城市竞争工作和人口。那些专门从事重工业活动的城市将从制造业的繁荣中获益,但与专门从事服务业经济的城市相比,那些投资于法规以降低发电、交通和家庭服务的社会成本的城市更容易受到污染。本文探讨了三个主要问题。首先,为什么污染会抑制城市竞争力?其次,为什么这种影响可能会随着时间的推移而变得越来越重要?第三,为什么城市迟迟不采取具有成本效益的监管策略?
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引用次数: 1
A Roadmap to Municipal Reform: Improving Life in Canadian Cities 市政改革路线图:改善加拿大城市生活
Pub Date : 2018-10-25 DOI: 10.2139/ssrn.3273008
Benjamin Dachis
Oct. 25, 2018 – Cities across Canada have the greatest effect of any level of government on the daily lives of Canadians, yet city councils seem hamstrung by the problems they face. There are solutions, according to a new book from former C.D. Howe Institute Associate Director, Research, Benjamin Dachis. In “A Roadmap to Municipal Reform: Improving Life in Canadian Cities,” Dachis addresses the greatest issues all cities face, from traffic congestion to housing affordability, and offers compelling policy solutions. Written from the point of view of a typical city resident, getting to work through traffic congestion, paying her utility bills, trying to understand why her city council always seems short of money, or trying to buy an affordable house, the book recommends fixes to these problems. The problems facing Canada’s cities are well-known. The solutions aren’t. And residents are the ones suffering the consequences. Dachis’s book, written while he was at the C.D. Howe Institute, contains policy recommendations that, if adopted, would make the lives of ordinary residents easier and more affordable. Dachis covers three big themes on how cities can do better. Part One looks at the way cities finance themselves and, through their budget plans, lay out the broad directions for their policies and administration. Part Two covers how cities spend the money they collect, both on day-to-day operations and on infrastructure. Part Three looks specifically at housing policies – at the way municipal governments are making homes more expensive to own and rent, and how they can fix that problem. Excerpts: On Fixing Municipal Finances “The common misperception that cities are broke stems from the way they set their budgets. Cities do not need additional tax powers beyond their traditional tax base of residential property taxes and user fees…. if we use the same financial accounting language for municipalities as the federal and provincial governments use, our understanding of municipal finances will change dramatically. Simply by adopting this more accurate language, a major misconception will have been removed.” On Getting Better Municipal Services “The core driver of municipal expenses is labour costs – they are already high and are increasing quickly. Contracting services on a competitive basis can dramatically reduce costs while simultaneously increasing service reliability and quality, as seen in Toronto’s waste collection services.” On the Costs and Causes of High Housing Prices: “Aside from Toronto and Vancouver, house prices in Canada have not historically gotten out of control. Even during its economic boom, house prices in Calgary barely budged. In Montreal and Ottawa, two cities that have seen recent solid economic growth, house prices were flat from 2007 through 2016. I look at the local-policy-driven causes of high house prices in Toronto and Vancouver and what to do about it.” On Better Water and Wastewater Servic
2018年10月25日-加拿大各地的城市对加拿大人日常生活的影响最大,但市议会似乎被他们面临的问题所束缚。根据前C.D. Howe研究所研究副主任本杰明·达奇斯的一本新书,解决办法是有的。在《市政改革路线图:改善加拿大城市生活》一书中,达奇斯阐述了所有城市面临的最大问题,从交通拥堵到住房负担能力,并提供了令人信服的政策解决方案。这本书从一个典型的城市居民的角度出发,从交通拥堵中上班,支付水电费,试图理解为什么她的市议会总是缺钱,或者试图买一套经济适用房的角度出发,建议解决这些问题。加拿大城市面临的问题是众所周知的。解决方案不是。而居民是承受后果的人。达奇斯的书是他在C.D.豪研究所(C.D. Howe Institute)工作时写的,书中包含了一些政策建议,如果这些建议被采纳,将使普通居民的生活更容易、更负担得起。达奇斯涵盖了城市如何做得更好的三大主题。第一部分着眼于城市融资的方式,并通过其预算计划,为其政策和管理制定了广泛的方向。第二部分介绍了城市如何将所收资金用于日常运营和基础设施建设。第三部分特别关注住房政策——市政府使住房拥有和租赁成本更高的方式,以及他们如何解决这个问题。“认为城市破产的普遍误解源于它们设定预算的方式。除了传统的住宅财产税和使用费税基外,城市不需要额外的税收权力....如果我们对市政当局使用与联邦政府和省政府使用的相同的财务会计语言,我们对市政财政的理解将发生巨大变化。只要采用这种更准确的语言,一个主要的误解就会被消除。”“市政开支的核心驱动因素是劳动力成本——劳动力成本已经很高,而且还在迅速上升。在竞争的基础上承包服务可以大大降低成本,同时提高服务的可靠性和质量,多伦多的废物收集服务就是一个例子。”关于高房价的成本和原因:“除了多伦多和温哥华,加拿大的房价在历史上并没有失控。即使在经济繁荣时期,卡尔加里的房价也几乎没有变化。在蒙特利尔和渥太华这两个最近经济增长强劲的城市,房价从2007年到2016年持平。我研究了多伦多和温哥华高房价的地方政策驱动的原因,以及如何解决这个问题。”“城市和省份可以通过规模经济更好地实现最优定价和降低成本的目标。要做到这一点,他们应该创建独立的公用事业公司,在独立监管机构的监督下进行区域运营。”达奇斯总结说,加拿大城市地区数百万人的生活可以通过一些简单的改变从好到好。加拿大所有城市都可以改进其财务信息的呈现方式。他们可以减轻企业的税收负担,并通过对道路收费来缓解交通拥堵。他们可以通过鼓励私人资金投资来建设更多的基础设施。他们可以合理地为水定价,以免浪费水,同时他们可以降低住房成本。
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引用次数: 6
Measurement and Assessment of the Evolution of Technology with a Simple Biological Model 用一个简单的生物学模型来测量和评估技术的进化
Pub Date : 2018-10-19 DOI: 10.1453/TER.V5I3.1747
M. Coccia
Abstract. A simple model of the development of technology is presented. This model, in a broad analogy with evolutionary ecology of parasites, within a theoretical framework of Generalized Darwinism, can explain vital characteristics of technological advances and technological evolution. In particular, the evolution of technology is modelled here in terms of morphological changes between a host technology and a main subsystem of technology. The coefficient of evolutionary growth of this simple model here indicates the grade and type of the evolution of technology. This coefficient is quantified in real cases study using historical data of farm tractor, freight locomotive and electricity generation technology in steam-powered plants and internal-combustion plants. The approach of measurement and assessment of technological evolution proposed here seems to be appropriate in grasping the dynamics of technological evolution to predict which technologies are likeliest to evolve rapidly. Keywords. Measurement of technology, Technometrics, Technological evolution, Technological change, Technological forecasting, Technology assessment, Technological progress, Innovation, Technology studies, Public decision making. JEL. O30, O31, O32, O33, O38.
摘要提出了技术发展的一个简单模型。在广义达尔文主义的理论框架内,这个模型与寄生虫的进化生态学进行了广泛的类比,可以解释技术进步和技术进化的重要特征。特别地,技术的进化在这里是根据宿主技术和主要技术子系统之间的形态变化来建模的。这个简单模型的进化增长系数表明了技术进化的等级和类型。利用农用拖拉机、货运机车以及蒸汽电厂和内燃机电厂发电技术的历史数据,对该系数进行了实际案例研究。本文提出的技术演化的测量和评估方法似乎适合于掌握技术演化的动态,以预测哪些技术最有可能快速演化。关键词。技术测量、技术计量学、技术演变、技术变革、技术预测、技术评估、技术进步、创新、技术研究、公共决策。冻胶。O30 o31 o32 o33 o38。
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引用次数: 16
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Urban Transportation eJournal
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