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Capacity Co-Opetition in Service Clusters with Waiting-area Entertainment 基于等候区娱乐的服务集群容量合作竞争研究
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2021-09-10 DOI: 10.2139/ssrn.3676177
Xin Li, Z. Lian, Ying Shi
Co-opetition becomes a more and more popular strategy in industry and is a growing force in the innovation landscape. Seldom research has considered the cases that co-opetition firms are providing service to customers who are waiting-time sensitive. This paper studies an M/M/1 queueing model with two service firms who compete the customers from the same source. Customers need to decide whether to join one of two queues or balk. On the other hand, the firms cooperate each other by sharing the waiting area. By assuming that the customers are waiting-time sensitive, but they enjoy the entertainment of the waiting-area as well, we find the Nash equilibriums that each provider decides its own service capacity and the two firms jointly determine the waiting-area entertainment (WAE) level. When the co-opetition market exists, we find some insightful results as below. 1)Only when the market size is large enough and at a suitable WAE level, can the co-opetition or monopoly market form, so a suitable WAE level can help service provider(s) survive and make profit. 2) As the effectiveness of the entertainment options increases, the service providers will adopt the entertainment options, and the optimal service capacities decrease with the effectiveness and converge to the potential market size; 3) When the effectiveness of the entertainment options is high enough, the low decrement of the service capacity will not lead to longer waiting time, the service provider should decrease the WAE level to save cost; 4) When the effectiveness of the entertainment options is too low, the high decrement of the service capacity leads to longer waiting time. To retain customers, the service providers should increase the WEA level to shorten the customers’ perceived waiting time; 5) The entertainment resource sharing in the case of co-opetition creates a higher profit than the case of competition, but lower profit than the case of monopoly.
合作竞争成为工业界越来越流行的战略,也是创新领域日益增长的力量。很少有研究考虑到合作竞争公司为等待时间敏感的客户提供服务的情况。本文研究了两个服务公司竞争同一来源顾客的M/M/1排队模型。顾客需要决定是加入两个队列中的一个,还是拒绝。另一方面,公司通过共享等候区来相互合作。假设顾客对等候时间敏感,但同时也享受等候区的娱乐,我们找到了每个供应商决定自己的服务能力,两家公司共同决定等候区娱乐水平的纳什均衡。当合作竞争市场存在时,我们得到了一些有意义的结果。1)只有当市场规模足够大且处于合适的WAE水平时,才能形成合作竞争或垄断市场,因此合适的WAE水平可以帮助服务提供商生存和盈利。2)随着娱乐选项有效性的提高,服务提供商将采用娱乐选项,最优服务容量随着有效性的提高而降低,并向潜在市场规模收敛;3)当娱乐选项的有效性足够高时,服务容量的低衰减不会导致等待时间变长,服务提供商应降低WAE级别以节省成本;4)当娱乐选项的有效性过低时,服务能力的高衰减导致等待时间更长。为了留住客户,服务提供商应提高WEA水平,缩短客户感知的等待时间;5)合作竞争情况下的娱乐资源共享创造的利润高于竞争情况,但低于垄断情况下的利润。
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引用次数: 1
Cloud-Kitchens in High-Density Cities: Economies of Scale Through Co-Location 高密度城市中的云厨房:通过托管实现规模经济
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2021-08-30 DOI: 10.2139/ssrn.3914446
A. Rout, Milind Dawande, G. Janakiraman
Delivery platforms have recently ventured into "cloud kitchens" (also called ghost or virtual kitchens), which are delivery-only facilities, built typically in locations with high population density, that provide commercial space to multiple restaurant kitchens for preparing their menu items. A cloud kitchen's central location allows for better access to customers, enabling the delivery platform to provide a lower delivery-time guarantee to customers -- this increases profitability for both the delivery platform and the restaurants. A potential second advantage accrues from the ability of the delivery platform to consolidate its driver capacity if multiple restaurants co-locate at the cloud kitchen -- this increases the delivery platform's profitability as it can use the same set of drivers to deliver orders for multiple restaurants. Cloud kitchens, however, come with high rental costs that are directly passed down to the restaurants. We examine the conditions under which a cloud kitchen benefits the three primary stakeholders, namely, the restaurants, the delivery platform, and customers. Our game-theoretic analysis is based on a stylized model consisting of two restaurants and a delivery platform. The two restaurants simultaneously decide whether to stay at their initial (extreme) locations or relocate to a cloud kitchen at a central location. Given the location decisions of the restaurants, the delivery platform decides the delivery-time guarantee for customers and the proportion of the market to serve. Our findings show that both the population density of the city and the economies of scale provided by the cloud kitchen play a significant role in driving the restaurants' location decisions. In line with current industry trends, we show that as the population density increases beyond a threshold, co-locating at the cloud kitchen is first a Pareto-dominant equilibrium for the restaurants and then the unique equilibrium. This equilibrium is also preferred by the delivery platform and the customers, leading to a win-win-win for all the stakeholders.
外卖平台最近冒险进入了“云厨房”(也称为幽灵或虚拟厨房),这是一种只提供外卖的设施,通常建在人口密度高的地方,为多个餐厅的厨房提供商业空间,供他们准备菜单上的菜品。云厨房的中心位置允许更好地访问客户,使交付平台能够为客户提供更短的交付时间保证——这增加了交付平台和餐厅的盈利能力。如果多家餐厅共用云厨房,配送平台可以巩固其司机能力,这可能带来第二个优势——这增加了配送平台的盈利能力,因为它可以使用同一组司机为多家餐厅送餐。然而,云厨房的租金很高,直接转嫁给了餐厅。我们研究了云厨房使三个主要利益相关者受益的条件,即餐馆、交付平台和客户。我们的博弈论分析是基于一个由两家餐厅和一个外卖平台组成的程式化模型。这两家餐厅同时决定是留在最初(极端)的位置,还是搬迁到中心位置的云厨房。根据餐厅的选址决策,配送平台决定顾客的配送时间保证和服务的市场比例。我们的研究结果表明,城市的人口密度和云厨房提供的规模经济在推动餐厅选址决策方面发挥了重要作用。根据当前的行业趋势,我们表明,随着人口密度增加超过阈值,云厨房的共同定位首先是餐馆的帕累托主导平衡,然后是独特的平衡。这种平衡也是交付平台和客户的首选,从而为所有利益相关者带来三赢。
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引用次数: 2
Credit Chain and Sectoral Co-movement: A Multi-Region Investigation 信用链与部门协同运动:一个多地区的调查
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2021-08-01 DOI: 10.2139/ssrn.3897212
Hsiao-Hui Lee, S. A. Yang, Yuxuan Zhang, Kijin Kim
This paper empirically examines how sectoral co-movement are correlated with trade credit usage in a multi-region setting. Extending the models in Shea (2002) and Raddatz (2010), we develop a framework that captures the impact of trade credit usage on co-movement between sectors within a country and cross countries separately. Using the Multi-Regional Input-Output Table developed by Asian Development bank, we assemble a dataset consisting of 14 manufacturing industries for 53 economies. We provide empirical evidence that trade credit linkage is an influential channel for both the domestic and cross-border shocks to propagate and to create a more profound impact in industries around the globe. We find the impact of domestic credit chain on sectoral co-movement is twice as strong as the international ones. We further examine the time trend of this relationship, and find that from 2000 to 2018, the positive relationship between the intensity of trade credit usage and sectoral correlation decreases. We posit that this could be due to a more diversified global trade pattern changes during these two decades.
本文实证考察了在多地区背景下,部门协同运动与贸易信贷使用之间的关系。扩展Shea(2002)和Raddatz(2010)的模型,我们开发了一个框架,该框架分别捕捉了贸易信贷使用对一国内部和跨国部门之间联合运动的影响。利用亚洲开发银行编制的多区域投入产出表,我们收集了53个经济体的14个制造业的数据集。我们提供的经验证据表明,贸易信贷联系是国内和跨境冲击传播并对全球产业产生更深远影响的重要渠道。我们发现,国内信贷链对行业协同运动的影响是国际信贷链的两倍。我们进一步考察了这一关系的时间趋势,发现从2000年到2018年,贸易信贷使用强度与行业相关性之间的正相关关系下降。我们认为,这可能是由于这二十年来全球贸易格局发生了更加多样化的变化。
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引用次数: 1
Approximations for the Lead Time Variance: A Forecasting and Inventory Evaluation 交货期方差的近似:预测和库存评估
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2021-04-08 DOI: 10.2139/ssrn.3822270
Patrick Saoud, N. Kourentzes, J. Boylan
Safety stock is necessary for firms in order to manage the uncertainty of demand. A key component in its determination is the estimation of the variance of the forecast error over lead time. Given the multitude of demand processes that lack analytical expressions of the variance of forecast error, an approximation is needed. It is common to resort to finding the one-step ahead forecast errors variance and scaling it by the lead time. However, this approximation is flawed for many processes as it overlooks the autocorrelations that arise between forecasts made at different lead times. This research addresses the issue of these correlations first by demonstrating their existence for some fundamental demand processes, and second by showing through an inventory simulation the inadequacy of the approximation. We propose to monitor the empirical variance of the lead time errors, instead of estimating the point forecast error variance and extending it over the lead time interval. The simulation findings indicate that this approach provides superior results to other approximations in terms of cycle-service level. Given its lack of assumptions and computational simplicity, it can be easily implemented in any software, making it appealing to both practitioners and academics.
为了管理需求的不确定性,安全库存是企业所必需的。在其确定的一个关键组成部分是预测误差的方差估计在提前期。由于许多需求过程缺乏预测误差方差的解析表达式,因此需要一个近似。通常的做法是找到提前一步的预测误差方差,并根据提前期对其进行缩放。然而,这种近似对于许多过程来说是有缺陷的,因为它忽略了在不同提前期做出的预测之间产生的自相关性。本研究首先通过证明它们在一些基本需求过程中的存在来解决这些相关性的问题,其次通过库存模拟显示近似的不充分。我们建议监测提前期误差的经验方差,而不是估计点预测误差方差并将其扩展到提前期区间。仿真结果表明,该方法在周期服务水平方面优于其他近似方法。由于缺乏假设和计算的简单性,它可以很容易地在任何软件中实现,这使得它对实践者和学者都很有吸引力。
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引用次数: 4
Reselling or Agency Selling? Consumer Valuation, Quality Design, and Manufacturers' Competition 转售还是代理销售?消费者评价、质量设计与制造商竞争
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2021-02-09 DOI: 10.2139/ssrn.3782238
L. Hsiao, Xin Ma, Ying‐ju Chen
The retail e-commerce yields lucrative revenue in many industries. In this work, we provide a strategic perspective by investigating how consumer valuation, product quality, and manufacturers’ competition influence the choice of selling agreement using stylized models. The utility and valuations of consumers are involved in analyzing strategic decisions under different selling agreement that is not trivial to analyze. We first show that agency selling agreement induces a higher retail price, but this can benefit the entire channel; under this agreement, the agency fee and consumer valuation present a nonmonotonic (approximately U-shaped) relation. Even though double marginalization exists, reselling agreement induces the manufacturer to make low-quality product compared to the agency selling agreement, but such a low-quality product is only profitable for the manufacturer. Second, when introducing manufacturers' competition, agency selling agreement can induce a wider quality difference: higher high-quality and lower low-quality. Agency selling agreement also hurts the manufacturer and the entire channel, but this is a preferred format for the low-quality manufacturer. Both the high-quality manufacturer and the entire channel and are profitable to choose the reselling agreement; offering a high-quality product can hurt the manufacturer remains robust. Third, the first-mover manufacturer can get a lower profit than the follower retailer. Moreover, when comparing scenarios with alternative sequences of making decisions, first-mover can lead to disadvantage, in that both supply chain parties prefer to act later rather than earlier. Our work also explains the rationale about why e-commerce firms in China now pay more attention to low-end consumers.
零售电子商务在许多行业产生了丰厚的收入。在这项工作中,我们通过使用程式化模型调查消费者评估、产品质量和制造商竞争如何影响销售协议的选择,提供了一个战略视角。在分析不同销售协议下的战略决策时,涉及到消费者的效用和价值,这是不容忽视的。我们首先表明,代理销售协议导致更高的零售价格,但这可以使整个渠道受益;在此协议下,代理费和消费者评价呈现非单调(近似u型)关系。即使存在双重边缘化,与代理销售协议相比,转售协议也会导致制造商生产低质量的产品,但这种低质量的产品只会给制造商带来利润。第二,当引入厂商竞争时,代理销售协议可以诱导更大的质量差异:高质量和低质量。代理销售协议也会伤害制造商和整个渠道,但这是低质量制造商的首选形式。无论是优质厂家还是全渠道,都选择有盈利能力的转售协议;提供高质量的产品可能会损害制造商的健康。第三,先行者制造商的利润可能低于后行者零售商。此外,当将情景与其他决策序列进行比较时,先发者可能会导致劣势,因为供应链双方都倾向于晚些行动,而不是早些行动。我们的研究也解释了为什么中国的电子商务公司现在更关注低端消费者的基本原理。
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引用次数: 0
Price and Assortment Competition under Consideration Set Formation: the Role of Anticipated Regret 对价集形成下的价格与品种竞争:预期后悔的作用
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2020-11-26 DOI: 10.2139/ssrn.3737953
Qingwei Jin, Mengyan Zhu, Lin Liu, Yi Yang
There are numerous evidence showing that consumers usually experience emotional dissonance (e.g. purchase regret) and anticipate it in consideration set formation process. Our paper investigates how anticipated regret affects consumers' consideration set formation and the relevant implications on sellers' price and assortment competition. We adopt a parallel search paradigm to explore how consumers form their consideration sets and use search depth and search breadth to alleviate anticipated regret, and to check how sellers optimally choose their prices and assortment sizes accordingly. Intuitively, regret not only lowers consumer surplus but also intensifies sellers' competition as consumers have incentive to include more competitive alternatives in consideration set to alleviate regret. However, our findings show that these intuitions may not always hold when search depth (i.e., the number of attributes to evaluate) is a choice. Specifically, we show that sellers may benefit from anticipated regret as it encourages consumers 1) to evaluate more product attributes (i.e., a deeper search depth) to alleviate regret (which increases consumers' willingness to pay); 2) to include less sellers to save search costs (which soften sellers' competition). Surprisingly, our results also show that anticipated regret can achieve a ``win-win-win" situation for consumers, sellers and social planner. We further explore sellers' assortment and price competition in reaction to anticipated regret, and demonstrate that sellers engage in assortment competition when regret intensity is low but price competition when it is high. Lastly, we show that both search cost and assortment may amplify the benefits of anticipated regret. Our analytic results provide potential interpretation to customers' search behavior under ecommerce environment and could guide sellers' assortment strategy and platform's search environment design.
有大量证据表明,消费者通常会经历情绪失调(如购买后悔),并在考虑集形成过程中进行预期。本文研究了预期后悔对消费者考虑集形成的影响及其对销售者价格和品种竞争的影响。我们采用平行搜索范式来探索消费者如何形成他们的考虑集,并使用搜索深度和搜索广度来减轻预期的遗憾,并检查卖家如何相应地优化选择价格和分类大小。从直觉上看,后悔不仅降低了消费者剩余,而且加剧了卖家的竞争,因为消费者有动机在考虑集中考虑更多有竞争力的替代品,以减轻后悔。然而,我们的研究结果表明,当搜索深度(即要评估的属性的数量)是一个选择时,这些直觉可能并不总是成立。具体来说,我们表明卖家可能会从预期后悔中受益,因为它鼓励消费者1)评估更多的产品属性(即更深的搜索深度)以减轻后悔(这增加了消费者的支付意愿);2)减少卖家数量,以节省搜索成本(这会削弱卖家的竞争)。令人惊讶的是,我们的研究结果还表明,预期后悔对消费者、卖家和社交策划者来说可以实现“三赢”的局面。我们进一步探讨了卖家对预期后悔的分类和价格竞争反应,并证明当后悔强度较低时,卖家会进行分类竞争,而当后悔强度较高时,卖家会进行价格竞争。最后,我们表明搜索成本和分类都可能放大预期后悔的好处。我们的分析结果为电子商务环境下消费者的搜索行为提供了潜在的解释,可以指导卖家的分类策略和平台的搜索环境设计。
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引用次数: 0
Queueing Versus Surge Pricing Mechanism: Efficiency, Equity, and Consumer Welfare 排队与峰时定价机制:效率、公平与消费者福利
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2020-09-24 DOI: 10.2139/ssrn.3699134
Yueyang Zhong, Zhixi Wan, Z. Shen
At the end of 2017, the leading ride-hailing platform DiDi Express replaced the commonly used surge pricing mechanism with a queueing mechanism, called the virtual queueing mechanism, in a number of cities across China to mitigate public relations pressure. To explore the benefits of the virtual queueing mechanism over the surge pricing mechanism in terms of operational efficiency, equity, and consumer welfare, we build a model of a data-driven state-dependent open queueing network, which we show can be approximated by an M/M/s+M queueing model with balking and reneging. We derive closed-form expressions for multiple performance metrics, including response rate, demand satisfaction rate, gross merchandise value (GMV), consumer surplus, and degree of inequality. Our theoretical and numerical analyses show that: (1) the virtual queueing mechanism outperforms the surge pricing mechanism in terms of consumer surplus, but is not as advantageous to generate GMV; (2) with respect to the response rate and demand satisfaction rate, the virtual queueing mechanism performs increasingly better than the surge pricing mechanism as demand increases; (3) the virtual queueing mechanism contributes to a more equitable ridesharing system, in the sense that consumer surplus is distributed across different classes of riders in a more balanced way. Using real data, we conduct a case study in Beijing, which verifies all the aforementioned results. The case study further finds that the response and demand satisfaction rates are significantly correlated with driver idleness.
2017年底,领先的叫车平台滴滴快线在中国多个城市用排队机制(称为虚拟排队机制)取代了常用的高峰期定价机制,以缓解公关压力。为了探讨虚拟排队机制在运营效率、公平和消费者福利方面优于峰时定价机制,我们建立了一个数据驱动的状态依赖开放排队网络模型,并证明了该模型可以近似为一个带有犹豫和违约的M/M/s+M排队模型。我们推导了多个绩效指标的封闭形式表达式,包括响应率、需求满意度、总商品价值(GMV)、消费者剩余和不平等程度。理论和数值分析表明:(1)虚拟排队机制在消费者剩余方面优于峰时定价机制,但在产生GMV方面不如峰时定价机制有利;(2)在响应率和需求满意率方面,随着需求的增加,虚拟排队机制的表现越来越好于峰时定价机制;(3)虚拟排队机制使得消费者剩余更均衡地分配给不同阶层的乘客,从而使拼车系统更加公平。我们利用实际数据,在北京进行了一个案例研究,验证了上述所有结果。案例分析进一步发现,响应率和需求满意率与司机怠速显著相关。
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引用次数: 3
Dual Channel Distribution: The Case for Cost Information Asymmetry 双渠道分销:成本信息不对称的案例
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2020-09-19 DOI: 10.2139/ssrn.3695386
Long Gao, Liang Guo, Adem Orsdemir
Dual channel distribution benefits upstream manufacturers but may irritate downstream retailers. The channel conflict only seems to aggravate when retailers are put at information disadvantage. We show this need not be the case. (i) We demonstrate upstream private information can improve channel efficiency and consumer surplus. The main mechanism is the offsetting interplay of signaling distortion and double marginalization: with private selling cost, the manufacturer may signal her cost by cutting the wholesale price; the price cut encourages the retailer to buy more, thereby reducing double marginalization and improving channel efficiency. (ii) We qualify the received wisdom. The general insight that cost information asymmetry reduces efficiency does not work in dual-channel settings. We show incorporating cost information asymmetry can change dual-channel equilibrium substantially — it can turn the retailer and channel from the victims of manufacturer encroachment to its beneficiaries. Also, we rationalize why the retailer can benefit from his information disadvantage, and when he can gain from the manufacturer's selling cost improvement, despite retail competition. (iii) We demonstrate our results are robust for other prevailing arrangements, e.g., two-part tariffs, price competition, imperfect substitution, and simultaneous moves. Our results suggest a more nuanced view of manufacturer encroachment: as private cost information can ease channel conflict and improve consumer surplus, previous studies may have overestimated the harm of encroachment. By highlighting the critical role of cost information asymmetry, this study sharpens our understanding of dual-channel theory and practice.
双渠道分销有利于上游制造商,但可能会激怒下游零售商。当零售商处于信息劣势时,渠道冲突似乎只会加剧。我们证明,情况并非如此。(i)我们证明了上游私有信息可以提高渠道效率和消费者剩余。其主要机制是信号扭曲和双重边缘化的相互抵消作用:对于私人销售成本,制造商可能通过降低批发价格来表明其成本;降价鼓励零售商购买更多,从而减少双重边缘化,提高渠道效率。(二)我们对公认的智慧加以限定。成本信息不对称降低效率的普遍观点在双渠道环境下并不适用。我们发现,纳入成本信息不对称可以从根本上改变双渠道均衡——它可以将零售商和渠道从制造商侵占的受害者转变为受益者。同时,我们解释了为什么零售商可以从他的信息劣势中获益,以及在零售竞争的情况下,他什么时候可以从制造商的销售成本改善中获益。(iii)我们证明我们的结果对于其他普遍的安排是稳健的,例如,两部分关税、价格竞争、不完全替代和同时移动。我们的研究结果提出了一个更为细致入微的制造商侵占观点:由于私人成本信息可以缓解渠道冲突并提高消费者剩余,以前的研究可能高估了侵占的危害。通过强调成本信息不对称的关键作用,本研究加深了我们对双渠道理论和实践的理解。
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引用次数: 0
Supplier Encroachment with Complementary Inputs 互补投入下的供应商侵占
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2020-09-05 DOI: 10.2139/ssrn.3686437
Chrysovalantou Milliou, Konstantinos Serfes
We examine the incentives and implications of supplier encroachment, when production of the final product requires multiple complementary inputs and each firm is specialized in the production of one input. Entry of a supplier into the final product market gives rise to cross-supply of inputs. We show, contrary to conventional views, that encroachment can increase wholesale prices and can reduce consumer surplus. We also show that encroachment can be beneficial both for the entrant and the incumbent, even when they are equally efficient and move simultaneously in the final product market and there are no prior investments in sales effort or cost reduction. The model yields novel managerial, empirical and policy implications.
当最终产品的生产需要多种互补的投入,并且每个企业都专门从事一种投入的生产时,我们研究了供应商侵占的激励和影响。供应商进入最终产品市场会引起投入物的交叉供应。我们表明,与传统观点相反,侵占可以提高批发价格,减少消费者剩余。我们还表明,侵占对进入者和在位者都是有利的,即使它们在最终产品市场上效率相同,同时行动,并且没有事先在销售努力或降低成本方面的投资。该模型产生了新的管理、经验和政策含义。
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引用次数: 2
Dynamic Dispatch and Centralized Relocation of Cars in Ride-Hailing Platforms 网约车平台车辆动态调度与集中调度
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2020-08-17 DOI: 10.2139/ssrn.3675888
B. Ata, Nasser Barjesteh, Sunil Kumar
We consider a ride-hailing platform that seeks to maximize its profit by dynamically dispatching cars to pick up customers and centrally relocating cars from one area to another. We model the ride-hailing platform as a closed stochastic processing network. Because the problem appears intractable, we resort to an approximate analysis in the heavy-traffic regime and consider the resulting Brownian control problem. This problem is simplified considerably and reduced to a lower-dimensional singular control problem called the workload formulation. We develop a novel algorithm to solve the workload problem numerically. We apply this algorithm to the workload problem derived from the New York City taxi data set. The solution helps us derive a dynamic control policy for the New York City application. In doing so, we prescribe the ride-hailing platform to first solve an offline linear program, whose optimal solution can be interpreted as the optimal static control policy. This solution helps partition the areas of the city into pools of areas. The platform only uses the information on the fraction of cars in the various pools, which reduces the state space dimension significantly, making the problem computationally tractable. When the distribution of cars among the pools is balanced, the platform follows the optimal static control policy. Otherwise, the platform intervenes to move the system to a more balanced state by either dropping demand or using a dispatch or relocation activity that is not used under the optimal static control policy. We demonstrate the effectiveness of the proposed dynamic control policy for the New York City application using a simulation study.
我们考虑的是一个网约车平台,它寻求通过动态调度车辆来接送客户,并将车辆从一个地区集中转移到另一个地区,从而实现利润最大化。我们将网约车平台建模为一个封闭的随机处理网络。由于这个问题似乎难以解决,我们在交通繁忙的情况下采用近似分析,并考虑由此产生的布朗控制问题。该问题得到了极大的简化,并简化为一个称为工作量公式的低维奇异控制问题。我们开发了一种新的算法来解决工作量问题。我们将该算法应用于纽约市出租车数据集的工作量问题。该解决方案帮助我们为纽约市应用程序派生一个动态控制策略。在此过程中,我们规定网约车平台首先求解一个离线线性规划,其最优解可以解释为最优静态控制策略。这种解决方案有助于将城市区域划分为区域池。该平台仅使用各个池中汽车的比例信息,大大降低了状态空间维度,使问题在计算上易于处理。当车辆在池中的分布达到平衡时,平台遵循最优静态控制策略。否则,平台会通过降低需求或使用在最优静态控制策略下未使用的调度或重新定位活动来进行干预,将系统移动到更平衡的状态。我们通过仿真研究证明了所提出的动态控制策略在纽约市应用中的有效性。
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引用次数: 5
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Manufacturing Engineering
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