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Entrepôt: Hubs, Scale, and Trade Costs Entrepôt:枢纽、规模和贸易成本
Pub Date : 2021-07-01 DOI: 10.3386/W29015
S. Ganapati, Woan Foong Wong, O. Ziv
Entrepots are hubs that facilitate trade between multiple origins and destinations. We study these entrepots, the network they form, and their impact on international trade. We document that the trade network is a hub-and-spoke system, where 80% of trade is shipped indirectly―nearly all via entrepots. We estimate indirect-shipping consistent trade costs using a model where shipments can be sent indirectly through an endogenous transport network and develop a geography-based instrument to estimate economies of scale in shipping. Counterfactual infrastructure improvements at entrepots have on average ten times the global welfare impact of improvements at non-entrepots.
转口港是促进多个原产地和目的地之间贸易的枢纽。我们研究这些转口港,它们形成的网络,以及它们对国际贸易的影响。我们的文件表明,贸易网络是一个中心辐射型系统,其中80%的贸易是间接运输的——几乎全部通过转口港。我们使用一个模型来估计间接运输一致的贸易成本,其中货物可以通过一个内生的运输网络间接发送,并开发了一个基于地理的工具来估计航运规模经济。平均而言,转口港基础设施改善对全球福利的影响是非转口港改善的10倍。
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引用次数: 24
A Duration Approach for Estimating the Marginal Renewal Cost at German Motorways 德国高速公路边际更新成本估算的持续时间方法
Pub Date : 2020-09-01 DOI: 10.2139/ssrn.3706006
Neil Murray, H. Link
We estimate the marginal costs of road renewals as part of a social marginal cost scheme for road user charging. Within an analytical approach that mirrors the relationship between road deterioration, traffic load and road renewal, we use an accelerated failure time model for road pavement with the purpose to derive the effect from traffic increase on the length of road renewal cycles. Based on a comprehensive dataset for German motorways we fit a Weibull duration model with covariates such as traffic load from heavy vehicles as well as various control variables and derive the road deterioration elasticity with respect to heavy traffic. Similar to available studies for Sweden we find a deterioration elasticity below one, implying that Newbery’s (1985) fundamental theorem does not hold for the German motorway network. The shape parameter of the Weibull function indicates that there is an ageing or weathering effect, and higher traffic loads are not the sole factor impacting on shorter pavement lifetimes. Our estimations yield a marginal renewal cost, which makes up approximately 40% of the average renewal cost. It implies that road user charges based on marginal costs will not yield a sufficient revenue to cover total costs.
我们估计道路更新的边际成本作为道路使用者收费的社会边际成本方案的一部分。在反映道路恶化、交通负荷和道路更新之间关系的分析方法中,我们使用了道路路面加速失效时间模型,目的是推导交通增加对道路更新周期长度的影响。基于德国高速公路的综合数据集,我们用协变量(如重型车辆的交通负荷以及各种控制变量)拟合了威布尔持续时间模型,并得出了相对于重型交通的道路恶化弹性。与瑞典的现有研究类似,我们发现退化弹性低于1,这意味着纽伯里(1985)的基本定理不适用于德国高速公路网。威布尔函数的形状参数表明存在老化或风化效应,较高的交通荷载不是影响路面寿命缩短的唯一因素。我们的估算得出了边际续订成本,约占平均续订成本的40%。这意味着基于边际成本的道路使用者收费不会产生足够的收入来支付总成本。
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引用次数: 0
Residential Parking Costs and Car Ownership: Implications for Parking Policy and Automated Vehicles 住宅停车成本和汽车拥有量:停车政策和自动驾驶汽车的影响
Pub Date : 2019-01-18 DOI: 10.2139/ssrn.3353093
F. Ostermeijer, H. Koster, Jos N. van Ommeren
Residents are often offered on-street parking at a fraction of the market price which may cause excess car ownership. However, residential parking costs are difficult to observe, so we propose an approach to estimate implicit residential parking costs and then examine the effect of these costs on household car ownership. We apply our approach to the four largest metropolitan areas of the Netherlands. Our results indicate that for city centres, annual residential parking costs are around €1000, or roughly 17 percent of car ownership costs, and are more than double the costs in the periphery. Our empirical estimates indicate that the disparity in parking costs explains around 30% of the difference in average car ownership rates between these areas and corresponds to a price elasticity of car demand of about −0.7. We apply these estimates to gauge the potential implications of automated vehicles which suggests that, if residents no longer require parking nearby their homes, car demand in city centres may increase by 8–14 percent.
居民经常以市场价的一小部分获得街边停车位,这可能会导致汽车保有量过剩。然而,住宅停车成本很难观察到,因此我们提出了一种估算隐含住宅停车成本的方法,然后研究这些成本对家庭汽车保有量的影响。我们将我们的方法应用于荷兰的四个大都市地区。我们的研究结果表明,在城市中心,每年的住宅停车成本约为1000欧元,约占汽车拥有成本的17%,是周边地区的两倍多。我们的实证估计表明,停车成本的差异解释了这些地区平均汽车拥有率差异的30%左右,对应于汽车需求的价格弹性约为- 0.7。我们运用这些估计来衡量自动驾驶汽车的潜在影响,这表明,如果居民不再需要在家附近停车,城市中心的汽车需求可能会增加8 - 14%。
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引用次数: 35
Internal Control Implementation in The Revenue Cycle – A Case Study an Online Transportation Company 收入周期中的内部控制实施——以一家在线运输公司为例
Pub Date : 2018-12-11 DOI: 10.2139/ssrn.3299218
Amalia Khaeriah Abidin, Alfi Andri
Internal control is a critical element in the business cycle, especially when it comes to sales and cash receipt cycle which is core of business in the company. The research focuses on service industry in Indonesia i.e., Gojek Indonesia, PT. Gojek Indonesia, PT is an online private transportation company which has eleven variety of unit businesses. However, the study focuses on two-unit business e.g., Go Ride and Go Send. The purpose of the study is to identify the internal control implemented towards sales and cash receipt and how it affected to the performance of revenue cycle department. The study finds that there is internal control implementation in the revenue cycle in the company. The study uses COSO framework as a measurement tools to control revenue cycle. In addition, the company implements internal control based on COSO framework towards revenue cycle, and effect to the performance of revenue cycle department. Although, the company implement the internal control, some procedures regarding standard operation procedure on sales and cash receipt cycle need to be improved, in addition, the documentations and administration which relate to the revenue cycle.
内部控制是商业周期的关键因素,特别是当涉及到销售和现金收入周期时,这是公司业务的核心。研究重点是印尼的服务行业,即Gojek Indonesia, PT. Gojek Indonesia, PT是一家在线私人运输公司,拥有11个不同的单位业务。然而,该研究侧重于两个单元的业务,例如Go Ride和Go Send。本研究的目的是确定对销售和现金收入实施的内部控制,以及它如何影响收入周期部门的绩效。研究发现,该公司在收入周期中实施了内部控制。本研究使用COSO框架作为衡量工具来控制收益周期。此外,公司对收入周期实施基于COSO框架的内部控制,并对收入周期部门的绩效产生影响。虽然公司实行了内部控制,但是销售和现金回款周期的标准操作程序的一些程序需要改进,另外,与收入周期相关的文件和管理也需要改进。
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引用次数: 1
Spatial Inequality and Urban Costs: Revisiting the Home Market Effect 空间不平等与城市成本:重新审视本土市场效应
Pub Date : 2018-06-28 DOI: 10.1111/jors.12414
Yiming Zhou
This paper investigates how the interactions between product differentiation, transport costs, and urban costs determine the spatial inequality in a general‐equilibrium model. We shed light on the interrelation between different definitions of home market effect (HME) in literature. While the wages in the large region are always higher, the HME in industrial distribution occurs in a limited range of parameters, implying that the HME in factor price is more pervasive. Moreover, we show that the reverse HME is the more common outcome. It indicates that neglecting urban costs in theoretical methodologies tends to overestimate the existence of HME. We also disclose how a change in urban costs or transport costs affects regional inequalities and welfare.
本文在一般均衡模型中研究了产品差异化、运输成本和城市成本之间的相互作用如何决定空间不平等。本文对文献中不同国内市场效应定义之间的相互关系进行了梳理。虽然大区域的工资水平总是较高,但产业分布上的HME发生在有限的参数范围内,这意味着要素价格上的HME更为普遍。此外,我们表明反向HME是更常见的结果。这表明,在理论方法上忽视城市成本往往会高估HME的存在。我们还揭示了城市成本或交通成本的变化如何影响地区不平等和福利。
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引用次数: 4
Ride Solo or Pool: Designing Price-Service Menus for a Ride-Sharing Platform 单人或拼车:为拼车平台设计价格-服务菜单
Pub Date : 2018-05-25 DOI: 10.2139/ssrn.3008136
Jagan Jacob, Ricky Roet-Green
A ride-sharing platform (RSP), such as Uber or Lyft, can sometimes offer passengers an option to share (pool) the ride with fellow passengers. On the one hand, a passenger who pools benefits from paying a lower fare and the RSP benefits from increasing occupancy per car, thereby serving more passengers. On the other hand, a passenger who pools takes more time, on average, to reach her destination and may have to share the ride with a stranger, and the RSP gets a lower profit margin per passenger than from solo rides. We develop a queueing model to find the RSP's optimal revenue at equilibrium when passengers are strategic, and drivers are independent agents, and design the RSP's revenue-maximizing price-service menu. We find that offering both solo and pooled rides is optimal when the distribution of passenger-type is not skewed, and congestion is not high. Counter intuitively, when congestion is high, the RSP benefits from offering only one ride choice, and simulation-based results extend these findings when more than one route exists. Revenue per driver can be non-monotonic with respect to the number of cars, even though total revenue is monotonic. Numerical analysis provides important insights when the number of drivers is endogenous. For instance, equilibrium revenue per driver can decrease when the passenger arrival rate increases. We find that when the driver supply side thickens, revenue per driver decreases. The compensation drivers receive (as a fraction of total revenue generated) increases with their reservation price and decreases with the arrival rate of passengers. When demand is low, a higher wage-payout fraction can increase RSP's equilibrium revenue.
乘车共享平台(RSP),如优步或Lyft,有时可以为乘客提供与其他乘客共乘(拼车)的选择。一方面,拼车的乘客可以从支付较低的票价中获益,而RSP则可以从每辆车的入住率增加中获益,从而为更多的乘客提供服务。另一方面,拼车的乘客平均要花更多的时间才能到达目的地,而且可能不得不与陌生人拼车,而且RSP从每位乘客身上获得的利润率低于单独乘车。通过建立排队模型,求出乘客具有策略性、司机为独立代理时,公交系统在均衡状态下的最优收益,并设计公交系统收益最大化的价格服务菜单。研究发现,当乘客类型分布不偏斜且拥堵程度不高时,单独出行和拼车都是最优选择。与直觉相反的是,当交通拥堵严重时,RSP只提供一种出行选择,而基于模拟的结果在存在多条路线时扩展了这些发现。尽管总收入是单调的,但每个司机的收入相对于汽车的数量可以是非单调的。当驱动因素的数量是内生的时,数值分析提供了重要的见解。例如,当乘客到达率增加时,每个司机的均衡收入会减少。我们发现,当司机供给侧变厚时,每个司机的收入减少。司机获得的补偿(作为总收入的一部分)随着预订价格的增加而增加,随着乘客到达率的降低而减少。当需求较低时,较高的工资支付比例可以增加RSP的均衡收益。
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引用次数: 63
Development of Paperless Foreign Trade Performance Measurement Scale the Multitrait-Multimethod Model Proposal 无纸化外贸绩效测评量表的研制——多特征-多方法模型的提出
Pub Date : 2017-11-13 DOI: 10.14514/BYK.m.21478082.2017.5/2.73-93
Mustafa Emre Civelek, Nagehan Uca
The purpose of this paper is to propose a scale development method to measure the performance of foreign trade companies in paperless trade operations. First, a qualitative interview method was used to determine the dimensions of the scale. As a result of this study, it was found that paperless trade performance has primary and secondary dimensions. This two level dimensionality lead to multitrait multimethod model (MTMM) in order to determine the construct validity. This paper consists of scale proposal to measure paperless trade performance under the primary dimension (payment, customs, insurance, transport, archiving) from the secondary dimensions perspective (speed, errors, costs, security, predictability, tracking & tracing, reporting). Findings show that a complex nested model is needed to verify the validity of the scale. The theoretical contribution of this research is the development of a method for a scale in paperless trade. The managerial contribution of this research is to provide an instrument for assessing the paperless trade performance of foreign trade companies.
本文的目的是提出一种衡量外贸企业无纸化贸易经营绩效的尺度开发方法。首先,采用定性访谈法确定量表的维度。本研究结果发现,无纸化贸易绩效有主要和次要维度。这两个层次的维度导致了多特征多方法模型(MTMM),以确定结构效度。本文从初级维度(支付、海关、保险、运输、归档)和次级维度(速度、错误、成本、安全、可预测性、跟踪和跟踪)衡量无纸化贸易绩效的尺度建议;跟踪、报告)。研究结果表明,需要一个复杂的嵌套模型来验证量表的有效性。本研究的理论贡献在于提出了一种无纸化贸易的规模计算方法。本研究的管理贡献在于提供一个评估外贸公司无纸化贸易绩效的工具。
{"title":"Development of Paperless Foreign Trade Performance Measurement Scale the Multitrait-Multimethod Model Proposal","authors":"Mustafa Emre Civelek, Nagehan Uca","doi":"10.14514/BYK.m.21478082.2017.5/2.73-93","DOIUrl":"https://doi.org/10.14514/BYK.m.21478082.2017.5/2.73-93","url":null,"abstract":"The purpose of this paper is to propose a scale development method to measure the performance of foreign trade companies in paperless trade operations. First, a qualitative interview method was used to determine the dimensions of the scale. As a result of this study, it was found that paperless trade performance has primary and secondary dimensions. This two level dimensionality lead to multitrait multimethod model (MTMM) in order to determine the construct validity. This paper consists of scale proposal to measure paperless trade performance under the primary dimension (payment, customs, insurance, transport, archiving) from the secondary dimensions perspective (speed, errors, costs, security, predictability, tracking & tracing, reporting). Findings show that a complex nested model is needed to verify the validity of the scale. The theoretical contribution of this research is the development of a method for a scale in paperless trade. The managerial contribution of this research is to provide an instrument for assessing the paperless trade performance of foreign trade companies.","PeriodicalId":420374,"journal":{"name":"TransportRN: Transportation Costs (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128824312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Price Dispersion, Competition, and Efficiency: Evidence from Chicago Based Routes 价格分散、竞争和效率:来自芝加哥航线的证据
Pub Date : 2017-01-25 DOI: 10.2139/ssrn.2612265
Levent Kutlu, Ran Wang
In this study we analyze the determinants of airline price dispersion. We particularly concentrate on the conduct and marginal cost efficiency. The effect of conduct on price dispersion seems to depend on the characteristics of the market. For the big city routes, we observe positive effect; and for the leisure routes we find negative effect. Also, we find that margial cost efficiency has a negative effect on price dispersion.
在本研究中,我们分析了航空公司价格分散的决定因素。我们特别关注行为和边际成本效率。行为对价格分散的影响似乎取决于市场的特点。对于大城市线路,我们观察到正效应;对于休闲路线,我们发现了负面影响。边际成本效率对价格分散度有负向影响。
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引用次数: 5
Facility Location for a Closed-Loop Distribution Network: A Hybrid Approach 闭环配电网的设施选址:一种混合方法
Pub Date : 2016-11-05 DOI: 10.1108/IJRDM-07-2015-0094
Abhijeet Ghadge, Qifan Yang, N. Caldwell, Christian König, M. Tiwari
Purpose The purpose of this paper is to find a sustainable facility location solution for a closed-loop distribution network in the uncertain environment created by of high levels of product returns from online retailing coupled with growing pressure to reduce carbon emissions. Design/methodology/approach A case study approach attempts to optimize the distribution centre (DC) location decision for single and double hub scenarios. A hybrid approach combining centre of gravity and mixed integer programming is established for the un-capacitated multiple allocation facility location problem. Empirical data from a major national UK retail distributor network is used to validate the model. Findings The paper develops a contemporary model that can take into account multiple factors (e.g. operational and transportation costs and supply chain (SC) risks) while improving performance on environmental sustainability. Practical implications Based on varying product return rates, SC managers can decide whether to choose a single or a double hub solution to meet their needs. The study recommends a two hub facility location approach to mitigate emergent SC risks and disruptions. Originality/value A two-stage hybrid approach outlines a unique technique to generate candidate locations under twenty-first century conditions for new DCs.
本文的目的是在不确定的环境中为闭环分销网络找到一个可持续的设施选址解决方案,这些环境是由在线零售的高水平产品回报和越来越大的减少碳排放的压力造成的。设计/方法/方法案例研究方法试图优化单中心和双中心场景下的配送中心(DC)选址决策。建立了一种将重心法与混合整数规划相结合的无能力多分配设施选址问题的混合方法。从一个主要的国家英国零售分销商网络的经验数据被用来验证模型。本文开发了一个现代模型,可以在提高环境可持续性绩效的同时考虑多种因素(例如运营和运输成本以及供应链(SC)风险)。基于不同的产品退货率,供应链管理人员可以决定是选择单中心还是双中心解决方案来满足他们的需求。该研究建议采用两个枢纽设施位置方法来减轻紧急SC风险和中断。创意/价值一种两阶段混合方法概述了一种独特的技术,可以在21世纪的条件下为新dc生成候选地点。
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引用次数: 21
Dynamic Oligopoly Pricing: Evidence from the Airline Industry 动态寡头垄断定价:来自航空业的证据
Pub Date : 2015-11-18 DOI: 10.2139/ssrn.2413180
Caspar Siegert, R. Ulbricht
We explore how pricing dynamics in the European airline industry vary with competition and document patterns that are consistent with intertemporal price discrimination. First, the rate at which prices increase over time decreases in competition, supporting the idea that competition restrains the ability of airlines to price-discriminate against late-arriving customers. Second, the sensitivity to competition increases in the heterogeneity of the customer base, reflecting that restraints on price discrimination are only relevant when there is initial scope for discrimination. The patterns explain 83 percent of the observed within-flight price dispersion and 17 percent of the cross-market variation in pricing dynamics.
我们探讨了欧洲航空业的定价动态如何随着竞争和文件模式的变化而变化,这些模式与跨期价格歧视相一致。首先,价格随时间增长的速度减少了竞争,这支持了竞争限制了航空公司对晚到乘客进行价格歧视的能力的观点。其次,顾客基础的异质性增加了对竞争的敏感性,这反映出对价格歧视的限制只有在存在最初的歧视范围时才有意义。这些模式解释了83%的航班内价格差异和17%的跨市场定价动态变化。
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引用次数: 17
期刊
TransportRN: Transportation Costs (Topic)
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