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The Facts on the Ground: Evaluating Humanitarian Fleet Management Policies Using Simulation 实地的事实:利用模拟评估人道主义船队管理政策
Pub Date : 2018-07-16 DOI: 10.2139/ssrn.3210334
Liyi Gu, I. Ryzhov, Mahyar Eftekhar
In humanitarian fleet management, the performance of purchase, assignment, and sales decisions is determined by dynamic interactions between the fleet composition (vehicles that were acquired at different times and have different residual values), the time-varying and uncertain demands on the fleet, and the depreciation of the vehicles as they are exploited. When all of these factors are taken into account, optimal decisions become analytically intractable. We pro-pose to evaluate purchase, assignment, and sales policies in a realistic simulation environment that directly models heterogeneous vehicle attributes and tracks their evolution over time. Using data from a large international humanitarian organization (LIHO), the simulator can identify the rationale behind seemingly ad-hoc decisions by field managers at LIHO. For instance, by selling vehicles later than LIHO recommends, managers are actually reducing their costs; similarly, managers decline to coordinate vehicles between mission types because the merits of "sharing" in this way turn out to be marginal at best.
在人道主义车队管理中,采购、分配和销售决策的绩效是由车队组成(在不同时间获得且具有不同残值的车辆)、对车队的时变和不确定需求以及车辆在使用时的折旧之间的动态相互作用决定的。当考虑到所有这些因素时,最优决策就变得难以分析。我们建议在一个真实的仿真环境中评估购买、分配和销售政策,该环境直接建模异构车辆属性并跟踪其随时间的演变。利用来自大型国际人道主义组织(LIHO)的数据,模拟器可以识别LIHO现场管理人员看似临时决定背后的理由。例如,通过晚于LIHO建议的时间销售汽车,管理人员实际上是在降低成本;同样,管理人员拒绝在不同的任务类型之间协调车辆,因为以这种方式“共享”的好处充其量是微不足道的。
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引用次数: 4
Can an Emission Trading Scheme Really Reduce CO2 Emissions in the Short Term? Evidence from a Maritime Fleet Composition and Deployment Model 碳排放交易计划能否在短期内减少二氧化碳排放?来自海上舰队组成和部署模型的证据
Pub Date : 2018-06-27 DOI: 10.2139/ssrn.3203617
Yewen Gu, S. Wallace, Xin Wang
Abstract Global warming is a major challenge for this planet, and its solution requires efforts throughout society. Maritime transportation, which carries more than 90% of the global trade, plays a critical role in the contribution of greenhouse gas (GHG) emissions. However, the GHGs emitted by the global fleet still fall outside the emission reduction scheme established by the Kyoto Protocol. Alternative solutions are therefore sought. Several market-based measures have been proposed and submitted to IMO for discussion and evaluation. In this paper, we focus on one of these measures, namely the Maritime Emissions Trading Scheme (METS). An optimization model that integrates (global or regional) METS into the classical fleet composition and deployment problem is proposed. This model is used as a tool to study the impact of METS on fleet operations and their CO2 emissions. The results of the computational study suggest that, in the short term, the implementation of METS does not lead to emission reduction in most scenarios. However, in the case of low bunker prices, high allowance costs or global METS coverage, a more significant CO2 decrease in the short term can be expected.
全球变暖是地球面临的重大挑战,解决这个问题需要全社会共同努力。海运承载着全球90%以上的贸易,在温室气体(GHG)排放中发挥着关键作用。然而,全球船队的温室气体排放仍不在《京都议定书》规定的减排范围之内。因此,寻求其他解决办法。已提出若干基于市场的措施,并提交海事组织讨论和评价。在本文中,我们将重点关注其中一项措施,即海上排放交易计划(METS)。提出了一种将(全局或区域)METS集成到经典车队组成和部署问题中的优化模型。该模型被用作研究METS对车队运营及其二氧化碳排放影响的工具。计算研究结果表明,在短期内,在大多数情况下,met的实施不会导致排放减少。然而,在低燃料价格、高配额成本或全球METS覆盖的情况下,可以预期短期内更显著的二氧化碳减少。
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引用次数: 45
Сокращения эмиссии СО2 от сжигания ископаемых видов топлива на 50 процентов по сравнению с 1990 годом в региональном разрезе (Reductions in CO2 Emissions From Fossil Fuel Combustion by 50 Percent Compared With 1990 in the Regional Context)
Pub Date : 2018-06-15 DOI: 10.2139/ssrn.3205271
V. Potashnikоv
Russian Abstract: Модели репрезентативной энергетической системы (РЭС), которые детально описывают энергетическую систему страны или региона на уровне технологий производства, трансформации, распределения и потребления различных видов энергии, широко применяются для долгосрочных прогнозов предложения и спроса на энергоресурсы и сценариев сокращения эмиссии. В работе приведены с сценарии сокращения эмиссии СО2 от сжигания ископаемых видов топлива. English Abstract: Models of a representative energy system (RES) that describe in detail the energy system of a country or region at the level of production, transformation, distribution and consumption technologies for various types of energy are widely used for long-term supply and demand forecasts and emission reduction scenarios. The paper presents scenarios for reducing CO2 emissions from burning fossil fuels.
俄罗斯摘要:代表性能源系统(RES)模型从不同类型能源的生产、转化、分配和消费技术层面详细描述了一个国家或地区的能源系统,被广泛用于能源供需和减排方案的长期预测。本文介绍了化石燃料燃烧产生的二氧化碳减排方案。英文摘要:代表性能源系统(RES)模型详细描述了一个国家或地区在各类能源的生产、转化、分配和消费技术层面的能源系统,被广泛用于长期供需预测和减排方案。本文介绍了减少化石燃料燃烧产生的二氧化碳排放的方案。
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引用次数: 0
Profit and Social Value: An Analysis of Strategies and Sustainability at the Base of the Pyramid 利润与社会价值:金字塔底层的战略与可持续性分析
Pub Date : 2018-06-07 DOI: 10.2139/ssrn.3328196
R. Ansted, Eric B. Dent
The last decade has seen a growing interest in market-based approaches to poverty reduction. Since the publication of Prahalad’s Fortune at the Bottom of the Pyramid in 2004, businesses, entrepreneurs, and researchers have investigated ways to tap into this fortune. Many researchers have suggested that companies could both do well financially and contribute to social good by serving the bottom two-thirds of the global economic pyramid and effectively raising members of this rapidly growing base of this pyramid (BOP) out of poverty (Agnihotri, 2013; Hammond et al., 2007; London, 2007; Prahalad & Hart, 1999). Although there have been many debates concerning the efficacy of BOP ventures in alleviating poverty (Arora & Romijn, 2012; Karnani, 2007; Warnholz, 2007), companies, entrepreneurs, and practitioners have found ways to profitably navigate the challenging market of the world’s poor and ultra-poor while simultaneously providing products and services that address their unique and localized social and economic needs. However, previously, no theoretical constructs guided the research or practice of market-based approaches to poverty. In 2008, the United Nations Development Program published a database of 50 case studies of ventures that demonstrated positive social impacts at the BOP and developed a conceptual framework of using BOP-centric strategies to overcome common constraints. Three years later, additional cases were published. This paper conducted a systematic review of 61 case studies to test this model, resulting in a holistic model synthesizing the various approaches. A comparative analysis provided insight into the importance of each component depending on various factors.. The research suggested that role of the poor, the industry, BOP-appropriate business models and the partnerships influence the development and the success of the BOP businesses.
过去十年,人们对以市场为基础的减贫方法越来越感兴趣。自2004年普拉哈拉德的《金字塔底层的财富》出版以来,企业、企业家和研究人员一直在研究如何利用这些财富。许多研究人员认为,通过服务于全球经济金字塔底部三分之二的人群,并有效地帮助这个快速增长的金字塔底部(BOP)的成员摆脱贫困,公司既可以在财务上做得很好,也可以为社会公益做出贡献(Agnihotri, 2013;Hammond et al., 2007;伦敦,2007;Prahalad & Hart, 1999)。尽管关于BOP企业在减轻贫困方面的有效性存在许多争论(Arora & Romijn, 2012;Karnani, 2007;Warnholz, 2007),公司,企业家和从业者已经找到了有利可图的方法,在世界上的穷人和超级穷人的具有挑战性的市场中导航,同时提供产品和服务,解决他们独特的和本地化的社会和经济需求。然而,在此之前,没有理论结构指导以市场为基础的贫困方法的研究或实践。2008年,联合国开发计划署发布了一个数据库,其中包含50个企业案例研究,这些案例研究证明了BOP对社会的积极影响,并制定了一个概念性框架,使用以BOP为中心的战略来克服共同的制约因素。三年后,又公布了一些病例。本文对61个案例研究进行了系统回顾,以检验这一模型,从而得出一个综合各种方法的整体模型。对比分析提供了对每个组成部分的重要性的见解,这取决于各种因素。研究表明,穷人的作用、行业、适合防喷器的商业模式和伙伴关系影响防喷器业务的发展和成功。
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引用次数: 3
The Moratorium on Agricultural Land Sale as a Limiting Factor for Rural Development 暂停出售农地是限制农村发展的因素
Pub Date : 2018-06-04 DOI: 10.30858/PW/9788376587448.7
A. Danylenko, T. Sokolska, O. Shust
The current state, conditions and possibilities on introduction the free circulation of agricultural land in Ukraine are investigated in the research, the main problems of its development are highlighted and the experience of agricultural land sale and lease of in European countries is analyzed. The survey presents the results of interviewing shareholders and agricultural producers in two districts – Bila Tserkva, Kyiv region and Uman, Cherkassy region. The model of the agricultural land market should meet not only economic efficiency and expediency, but also contribute to the sustainable development of rural areas, where the circulation of agricultural land should be preceded by the introduction of appropriate restrictions. In order to prevent landlessness of peasants and the formation of latifundists, the free circulation of land can be implemented in two stages. Stage 1: land inventory, cadaster and land management system, which includes four subsystems: 1) land rights (distribution and provision of land rights, legal registration of land borders, transfer of ownership rights or use rights through the conclusion of sales agreements or lease; the establishment of borders of land and property rights to them; the consideration and resolution of disputes concerning the rights on land plots and their boundaries. Monetary valuation of land (valuation of land and property associated with it, provision of income on tax payments); 3) land use (land use control through territorial planning schemes and rules for land use at the national, regional and local levels; ensuring compliance with land use plans and rules; disputes over land use; compliance with resource-saving business practices and environmental measures); 4) infrastructure development. Stage 2: opening the market for state and communal property land. The priorities on purchase are to be provided for the local communities, restriction on access the market for the legal entities, foreigners, introduction of other restrictions on the sale of agricultural land, the application the taxes differentiations on land sales, fees, etc.
研究考察了乌克兰引进农用地自由流通的现状、条件和可能性,指出了乌克兰农用地自由流通发展中存在的主要问题,分析了欧洲国家农用地买卖租赁的经验。该调查介绍了对两个地区的股东和农业生产者进行访谈的结果-基辅地区的Bila Tserkva和切尔卡斯地区的乌曼。农地市场模式既要符合经济效益和权宜之计,又要有利于农村的可持续发展,在农地流转之前应引入适当的限制措施。为防止农民无地和大庄园主的形成,土地自由流转可分两个阶段实施。第一阶段:土地清查、地籍和土地管理系统,包括四个子系统:1)土地权利(土地权利的分配和提供,土地边界的法律登记,通过签订销售协议或租赁转让所有权或使用权;划定边界的土地及其产权;土地所有权及其边界纠纷的审议与解决。土地的货币估价(土地及其相关财产的估价,提供纳税收入);3)土地利用(通过国土规划方案和国家、区域和地方各级土地利用规则进行土地利用控制;确保遵守土地使用计划和规则;土地使用纠纷;遵守节约资源的商业守则和环保措施);四是基础设施建设。第二阶段:开放国有和公有土地市场。为当地社区提供优先购买权,限制法人实体、外国人进入市场,对农业用地销售实行其他限制,对土地销售实行税收差别,收费等。
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引用次数: 10
Rain Barrel Project: Rainwater Harvesting for Sustainable Water Supply in Urban Households 雨水桶项目:城市家庭可持续供水的雨水收集
Pub Date : 2018-05-26 DOI: 10.2139/ssrn.3201115
Rosita Widjojo, I. A. Raharjo
Severe droughts have brought an impact to many areas in Indonesia: diminishing water supply. Factors that contribute are mainly deforestation and unregulated ground water drilling. With an increasing population, the demand for water is also escalating. As a consequence, many residential areas and industries are extracting ground water to fulfill their daily demands. This has led to the depletion of ground water down to a significant low level. The city of Bandung is dangerously critical in terms of ground water supply as it is predicted to be dry in 2025 (ADB, 2016). Driven with a sense of urgency, this project aims to provide an option for urban households of north Bandung to manage surface water by rainwater harvesting, using rain barrels. It is a system that collects rainwater runoff for later use. Rain barrels can be especially important in arid or heavily populated urban areas to reduce demands on increasingly limited water supply. Rainwater harvesting systems are measured by the area for collecting water (in m2 or ft2) and the volume of water they store (in liters or gallons) (Feehan et al., 2014). To size a system for a site, areas chosen for the rainwater collecting site should have enough volume of water for occupants, given the site's rainfall patterns. Data is required to calculate the rainwater harvest rate, occupants’ needs, rainfall and efficiency (www.watercache.com). In addition, the system should also include a filter so water can be used for washing. Once the data is collected, then the cost of installing the system can be estimated, where the cost can be applied to individual households or shared in communities. The application of a rainwater harvesting system can be a sustainable solution in areas where water is scarce, as well as a positive environmental impact in the long run.
严重的干旱给印度尼西亚的许多地区带来了影响:供水减少。造成这种情况的主要因素是森林砍伐和不受管制的地下水开采。随着人口的增长,对水的需求也在不断升级。因此,许多居民区和工业都在抽取地下水来满足他们的日常需求。这导致地下水的消耗下降到一个非常低的水平。万隆市在地下水供应方面处于危险的关键地位,因为预计到2025年该市将干涸(亚行,2016年)。在紧迫感的驱使下,该项目旨在为万隆北部的城市家庭提供一种选择,通过使用雨水桶收集雨水来管理地表水。这是一个收集雨水径流供以后使用的系统。雨水桶在干旱或人口稠密的城市地区尤其重要,可以减少对日益有限的供水的需求。雨水收集系统通过收集水的面积(以m2或ft2为单位)和储存水的体积(以升或加仑为单位)来测量(Feehan等人,2014)。考虑到场地的降雨模式,为场地选择的雨水收集场地应该有足够的水量供居住者使用。需要数据来计算雨水收集率、居住者需求、降雨量和效率(www.watercache.com)。此外,该系统还应该包括一个过滤器,以便水可以用于洗涤。一旦收集到数据,就可以估算安装该系统的成本,这些成本可以应用于单个家庭或在社区中分摊。在缺水地区,雨水收集系统的应用是一种可持续的解决方案,从长远来看,也会对环境产生积极影响。
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引用次数: 0
The Governance of Risks in Ridesharing: A Revelatory Case from Singapore 拼车风险治理:来自新加坡的启示案例
Pub Date : 2018-05-16 DOI: 10.3390/EN11051277
Yanwei Li, Araz Taeihagh, M. Jong
Recently we have witnessed the worldwide adoption of many different types of innovative technologies, such as crowdsourcing, ridesharing, open and big data, aiming at delivering public services more efficiently and effectively. Among them, ridesharing has received substantial attention from decision-makers around the world. Because of the multitude of currently understood or potentially unknown risks associated with ridesharing (unemployment, insurance, information privacy, and environmental risk), governments in different countries apply different strategies to address such risks. Some governments prohibit the adoption of ridesharing altogether, while other governments promote it. In this article, we address the question of how risks involved in ridesharing are governed over time. We present an in-depth single case study on Singapore and examine how the Singaporean government has addressed risks in ridesharing over time. The Singaporean government has a strong ambition to become an innovation hub, and many innovative technologies have been adopted and promoted to that end. At the same time, decision-makers in Singapore are reputed for their proactive style of social governance. The example of Singapore can be regarded as a revelatory case study, helping us further to explore governance practices in other countries.
近年来,众包、拼车、开放数据、大数据等创新技术在全球广泛应用,提高公共服务的效率和效益。其中,拼车受到了全球决策者的高度关注。由于目前了解或潜在未知的与拼车相关的风险(失业、保险、信息隐私和环境风险)众多,不同国家的政府采用不同的策略来应对这些风险。一些政府完全禁止采用拼车,而另一些政府则提倡这种做法。在这篇文章中,我们讨论的问题是,随着时间的推移,如何管理拼车所涉及的风险。我们对新加坡进行了深入的单一案例研究,并研究了新加坡政府如何在一段时间内解决拼车的风险。新加坡政府有成为创新中心的雄心壮志,并为此采用和推广了许多创新技术。与此同时,新加坡的决策者以其积极主动的社会治理风格而闻名。新加坡的例子可以被视为一个启发性的案例研究,有助于我们进一步探索其他国家的治理实践。
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引用次数: 45
Industrial Infrastructure Development for Sustainable Economic Growth 工业基础设施建设促进经济可持续增长
Pub Date : 2018-04-25 DOI: 10.2139/ssrn.3168469
M. Abdin
Infrastructure refers to the basic facility required to run the daily life of the citizen of a country or city like roads, bridges, tunnels, water supplies, sewers, electricity, gas, telecommunication system, cellular network, internet connectivity and broadband speed etc. Infrastructures are primarily classified into two brad heads namely, hard infrastructures like transportation networks like roads, airports, sea ports or river ports, railroads etc. and soft infrastructures like education system, healthcare system, law and order situation, financial system, form of government, financial service and government responses to the civil emergency etc. of a country. Bangladesh has primarily graduated from the LDC list this year and hopping to be sustainably graduating into developing countries list by 2024. To fulfill that mission we have to fight few socioeconomic inconveniences like providing employment to the existing unemployed as well as new comers in this category, improve infrastructure (hard and soft) facilities, transform the economy from agricultural based into industrialised one.
基础设施是指一个国家或城市公民日常生活所需的基本设施,如道路、桥梁、隧道、供水、下水道、电力、天然气、电信系统、蜂窝网络、互联网连接和宽带速度等。基础设施主要分为两大类,即硬基础设施,如道路、机场、海港或河港、铁路等交通网络,软基础设施,如一个国家的教育系统、医疗系统、法律和秩序状况、金融系统、政府形式、金融服务和政府对民事紧急情况的反应等。孟加拉国今年基本上从最不发达国家名单中毕业,并有望在2024年之前可持续地进入发展中国家名单。为了完成这一使命,我们必须解决一些社会经济上的问题,比如为现有失业者和新失业者提供就业机会,改善基础设施(硬的和软的),把经济从农业转向工业化。
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引用次数: 1
Coordinating Separate Markets for Externalities 协调外部性的独立市场
Pub Date : 2018-04-01 DOI: 10.3386/W24481
J. Abito, Christopher R. Knittel, Konstantinos Metaxoglou, A. Trindade
We show that inefficiencies from having separate markets to correct an environmental externality are significantly mitigated when firms participate in an integrated product market. Firms take into account the distribution of externality prices and reallocate output from markets with high prices to markets with low prices. Investment in cleaner and more efficient capacity serves as an additional mechanism to reallocate output, which increases the marginal benefit of investment, and consequently improves longer-term outcomes. Using data from an integrated wholesale electricity market, we estimate a dynamic structural model of production and investment to bound the loss from separate markets for carbon dioxide emissions, and quantify the extent to which optimal investment can compensate for the loss. Despite the lack of the “invisible hand” of a single emissions market, profit-maximizing firms can play a crucial role in coordinating otherwise uncoordinated environmental regulations.
我们的研究表明,当企业参与一体化产品市场时,由独立市场来纠正环境外部性的低效率得到了显著缓解。企业考虑到外部性价格的分配,并将产出从高价格市场重新分配到低价格市场。投资于更清洁和更高效的产能可以作为重新分配产出的额外机制,从而增加投资的边际效益,从而改善长期成果。利用一个综合电力批发市场的数据,我们估计了一个生产和投资的动态结构模型,以约束独立市场对二氧化碳排放的损失,并量化了最优投资可以弥补损失的程度。尽管缺乏单一排放市场这只“看不见的手”,但利润最大化的公司可以在协调其他不协调的环境法规方面发挥关键作用。
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引用次数: 5
Incorporating Environmental, Social and Governance (ESG) Factors into Fixed Income Investment 将环境、社会和治理(ESG)因素纳入固定收益投资
Pub Date : 2018-04-01 DOI: 10.2139/ssrn.3175830
Georg Inderst, F. Stewart
This research report is the result of a partnership between the World Bank Group (WBG) and Government Pension Investment Fund (GPIF) of Japan, initiated by the World Bank Group's President, Jim Yong Kim, and GPIF's Chief Investment Officer, Hiro Mizuno. The aim is for the World Bank and IFC – member of the World Bank Group focused on the private sector – and GPIF to collaborate on initiatives that promote strategies for including environmental, social and governance (ESG) criteria in investment decisions across asset classes. Ultimately, the goal is to direct more capital towards sustainable investments and leverage the private sector to achieve the scale of investment needed to meet the Sustainable Development Goals.
本研究报告是世界银行集团(WBG)与日本政府养老金投资基金(GPIF)合作的成果,该合作由世界银行集团行长金墉和GPIF首席投资官水野弘发起。其目的是让世界银行、国际金融公司(IFC)——世界银行集团中专注于私营部门的成员机构——以及GPIF合作开展倡议,推动将环境、社会和治理(ESG)标准纳入各资产类别投资决策的战略。最终目标是将更多资本引向可持续投资,并利用私营部门实现实现可持续发展目标所需的投资规模。
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引用次数: 32
期刊
PSN: Sustainable Development (Topic)
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