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Framework Agreements in Procurement: An Auction Model and Design Recommendations 采购框架协议:拍卖模式和设计建议
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2017-07-19 DOI: 10.2139/ssrn.2257073
Y. Gur, Lijian Lu, G. Weintraub
Framework agreements (FAs) are procurement mechanisms commonly used by buying agencies around the world to satisfy demand that arises over a certain time horizon. This paper is one of the first in the literature that provides a formal understanding of FAs, with a particular focus on the cost uncertainty bidders face over the FA time horizon. We generalize standard auction models to include this salient feature of FAs and analyze this model theoretically and numerically. First, we show that FAs are subject to a sort of winner’s curse that in equilibrium induces higher expected buying prices relative to running first-price auctions as needs arise. Then, our results provide concrete design recommendations that alleviate this issue and decrease buying prices in FAs, highlighting the importance of (i) monitoring the price charged at the open market by the FA winner to bound the buying price; (ii) implementing price indexes for the random part of suppliers’ costs; and (iii) allowing suppliers the flexibility to...
框架协议(FAs)是世界各地的采购机构通常使用的采购机制,以满足在一定时间范围内出现的需求。本文是文献中第一个提供对并购交易的正式理解的论文之一,特别关注投标人在并购交易时间范围内面临的成本不确定性。我们对标准拍卖模型进行了推广,使其包含了FAs的这一显著特征,并对该模型进行了理论和数值分析。首先,我们表明,FAs受制于一种赢家的诅咒,在均衡状态下,随着需求的增加,相对于进行首价拍卖,FAs会导致更高的预期购买价格。然后,我们的研究结果提供了具体的设计建议,以缓解这一问题并降低FAs的购买价格,强调了以下几点的重要性:(i)监测FA获胜者在公开市场上收取的价格,以约束购买价格;(二)对供应商成本的随机部分实施价格指数;(三)允许供应商灵活地……
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引用次数: 15
Pass-through Constrained Vendor Funds for Promotion Planning 推广计划的传递约束供应商资金
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2017-06-25 DOI: 10.2139/ssrn.2992374
Lennart Baardman, Kiran Panchamgam, G. Perakis
We analyze how pass-through constrained vendor funds impact promotion planning of both suppliers and retailers. Vendor funds are trade deals in which a supplier offers a retailer a short-term discount on a specific product, encouraging the retailer to discount the product. Past vendor funds have had significant shortcomings. In this paper, we propose the pass-through constrained vendor fund in which the supplier requires the retailer to pass-through a minimal fraction of the discount. The vendor fund offer and selection problem is modeled as a bi-level optimization problem in which a supplier wishes to determine what pass- through constrained vendor fund to offer to a retailer that can accept or reject the offer. First, we formulate the lower-level retailer model as an integer quadratic optimization model to help retailers decide on which vendor funds to accept. Using Lagrangian relaxation methods we create an efficient algorithm with theoretical guarantees and near-optimal performance on Oracle Retail client data. Second, we analyze a bi-level supplier model to determine which vendor fund a supplier should offer. We show that the vendor fund with pass- through constraint mitigates forward-buying by the retailer and coordinates supply chains on the short-term.
我们分析了传递受限的供应商资金如何影响供应商和零售商的促销计划。供应商基金是一种贸易交易,其中供应商为零售商提供特定产品的短期折扣,鼓励零售商打折该产品。过去的供应商基金存在重大缺陷。在本文中,我们提出了传递约束的供应商基金,其中供应商要求零售商传递折扣的最小部分。将供应商资金的提供和选择问题建模为一个双层优化问题,其中供应商希望确定向可以接受或拒绝该报价的零售商提供何种直通受限的供应商资金。首先,我们将下级零售商模型建立为一个整数二次优化模型,以帮助零售商决定接受哪个供应商的资金。利用拉格朗日松弛方法,我们在Oracle Retail客户端数据上创建了一个具有理论保证和接近最优性能的高效算法。其次,我们分析了一个双层供应商模型,以确定供应商应该提供哪些供应商资金。研究结果表明,具有传递约束的供应商资金在短期内抑制了零售商的超前购买行为,并对供应链进行了协调。
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引用次数: 2
Supply Chain Contracting in Environments with Volatile Input Prices and Frictions 投入价格波动和摩擦环境下的供应链契约
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2017-06-14 DOI: 10.2139/ssrn.2752628
P. Kouvelis, Danko Turcic, Wenhui Zhao
Problem description: Purchase costs of raw materials required in production tend to fluctuate over time. Mild cost fluctuations merely affect firms’ profitability. Significant variations can lead to supply chain disruption. What are the best contracts to be used in supply chains exposed to fluctuating raw material costs? We ask this question in two contexts—in the presence and the absence of working capital constraint. Academic/practical relevance: We add a framework on how to optimally contract in the presence of stochastic costs and working capital constraints and help managers understand how they can increase profitability. Methodology: We present a game-theoretic study of a bilateral monopoly supply chain with stochastic demand, stochastic input costs, production lead times, and working capital constraints. The upstream firm announces a supply contract to which the downstream firm responds with an order quantity. The contract is a single-price, multi-instrument contract with optional default penalties...
问题描述:生产所需原材料的采购成本会随时间波动。轻微的成本波动只会影响企业的盈利能力。显著的变化可能导致供应链中断。在原材料成本波动的供应链中,最好的合同是什么?我们在两种情况下提出这个问题——存在和不存在营运资金约束。学术/实践相关性:我们增加了一个关于如何在随机成本和营运资金限制的情况下优化合同的框架,并帮助管理人员了解如何提高盈利能力。方法:我们提出了一个博弈论研究的双边垄断供应链随机需求,随机投入成本,生产提前期,和营运资金的限制。上游企业宣布了一份供应合同,下游企业对此作出了订单数量的回应。该合同是单价、多工具合同,可选择违约处罚。
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引用次数: 34
Auctions in the Online Display Advertising Chain: A Case for Independent Campaign Management 在线展示广告链中的拍卖:一个独立活动管理的案例
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2017-06-05 DOI: 10.2139/ssrn.2919665
Amine Allouah, Omar Besbes
In many auctions, buyers are represented by an intermediary that manages their bidding process, along with that of other buyers. Notably, this is prevalent in the real-time online display advertising market, in which advertisers bid for impressions through intermediaries called demand side platforms (DSPs). In turn, intermediaries, when bidding on behalf of their customers, strategize to maximize some internal objective and may only submit a single bid to limit competition on a given item. In the present paper, we propose a framework to analyze the implications of such a campaign coordination role by DSPs, taking as a benchmark the case in which each DSP would manage the bidding process of each advertiser it represents independently of other buyers, a case we refer to as multi-bidding. We show that the adoption of multi-bidding by all intermediaries would lead to an increase in both the social welfare and the seller's revenues. Furthermore, we analyze the impact on buyers in two regimes: i.) without competition among intermediaries and ii.) with competition, with a large number of intermediaries and buyers in an appropriate asymptotic regime. Quite remarkably, we establish that multi-bidding would also lead to an increase in the buyers' side surplus under a very broad set of market characteristics. In particular, as long as the average number of buyers interested in an item is moderate and the coefficient of variation of buyers' values is not too small, moving from coordinated campaigns to multi-bidding leads to a Pareto improvement in the value chain.
在许多拍卖中,买家由一个中间人代表,与其他买家一起管理他们的竞标过程。值得注意的是,这在实时在线展示广告市场中很普遍,在这个市场中,广告商通过被称为需求方平台(dsp)的中介机构竞标广告印象。反过来,中间商在代表他们的客户投标时,会制定策略,以最大化某些内部目标,并且可能只提交一次投标,以限制对给定项目的竞争。在本文中,我们提出了一个框架来分析DSP这种活动协调角色的影响,并以每个DSP将独立于其他买家管理其所代表的每个广告商的投标过程的情况为基准,我们将这种情况称为多重投标。我们证明了所有中介机构采用多重竞标将导致社会福利和卖方收入的增加。进一步,我们分析了在两种情况下对买家的影响:i.)中介之间没有竞争和ii.)有竞争,在一个适当的渐进制度下有大量的中介和买家。值得注意的是,我们确定了在非常广泛的市场特征下,多重竞标也会导致买方盈余的增加。特别是,只要对某项商品感兴趣的买家平均数量适中,且买家价值的变异系数不太小,那么从协调活动到多重竞标的转变就会导致价值链中的帕累托改进。
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引用次数: 16
Does Adding Inventory Increase Sales? Evidence of a Scarcity Effect in U.S. Automobile Dealerships 增加库存会增加销售额吗?美国汽车经销商稀缺效应的证据
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2017-06-01 DOI: 10.2139/ssrn.2286800
Gérard P. Cachon, Santiago Gallino, M. Olivares
What is the relationship between inventory and sales? Clearly, inventory could increase sales: expanding inventory creates more choice (options, colors, etc.) and might signal a popular/desirable product. Or, inventory might encourage a consumer to continue her search (e.g., on the theory that she can return if nothing better is found), thereby decreasing sales (a scarcity effect). We seek to identify these effects in U.S. automobile sales. Our primary research challenge is the endogenous relationship between inventory and demand — e.g., dealers influence their inventory in anticipation of demand. Hence, our estimation strategy relies on weather shocks at upstream production facilities to create exogenous variation in downstream dealership inventory. We find that the impact of adding a vehicle of a particular model to a dealer's lot depends on which cars the dealer already has. If the added vehicle expands the available set of sub-models (e.g., adding a four-door among a set that is exclusively two-door), then sales increase. But if the added vehicle is of the same sub-model as an existing vehicle, then sales actually decrease. Hence, expanding variety should be the first priority when adding inventory — adding inventory without expanding variety is actually detrimental. Based on this insight, given a fixed set of cars, vehicles should be allocated among a group of dealers so as to maximize each dealer's variety. Our data indicate that the implementation of this strategy could increase expected sales by about 2.5% without changing the total number of vehicles in the market, which vehicles are produced or the number of vehicles at each dealership. If the firm is willing to reduce aggregate inventory by a modest 2.9% (and no more than 10% at any one dealer), then the sales impact of the "maximize variety, minimize duplication strategy" doubles, to 5.0%.
库存和销售之间的关系是什么?显然,库存可以增加销量:增加库存可以创造更多选择(选项、颜色等),这可能意味着这是一款受欢迎/受欢迎的产品。或者,库存可能会鼓励消费者继续搜索(例如,如果没有找到更好的,她可以返回的理论),从而减少销售(稀缺效应)。我们试图找出这些对美国汽车销售的影响。我们的主要研究挑战是库存和需求之间的内生关系——例如,经销商在预期需求的情况下影响其库存。因此,我们的估计策略依赖于上游生产设施的天气冲击,从而在下游经销商库存中产生外生变化。我们发现,在经销商的库存中增加一辆特定型号的汽车所产生的影响取决于经销商已经拥有哪些汽车。如果增加的车辆扩大了可用的子模型集(例如,在一组只有两门的集合中增加了一辆四门),那么销量就会增加。但如果新增的车辆与现有车辆属于同一子车型,那么销量实际上会下降。因此,在增加库存时,扩大品种应该是首要任务——增加库存而不扩大品种实际上是有害的。基于这一见解,给定一组固定的汽车,车辆应该分配给一组经销商,以最大限度地提高每个经销商的品种。我们的数据表明,这一策略的实施可以在不改变市场上的车辆总数、生产的车辆或每个经销商的车辆数量的情况下,将预期销量提高约2.5%。如果公司愿意将总库存减少2.9%(任何一家经销商都不超过10%),那么“最大化品种,最小化重复策略”的销售影响将翻倍,达到5.0%。
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引用次数: 76
Competitive Returns Policies with Salvaging: When Less is More 竞争性退货政策与打捞:当少即是多
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2017-02-12 DOI: 10.2139/ssrn.3076740
Felix Röllecke, Arnd Huchzermeier
Online retailers are divided over the optimal use of salvaging in their returns policies. Should firms have restrictive returns policies yet unconstrained use of secondary markets for salvaging, thereby risking oversupply and low salvage values? Or should firms have lenient returns policies while limiting the size of their secondary market, thus engaging in repeated and costly refurbishing activities? This paper investigates optimal returns policy decisions in a competitive environment with endogenous salvaging values. The strategic decisions are two components of the retailer's returns policy: price and restocking fee. We consolidate retailer decisions in a duopoly setup under which endogenous salvaging is modeled as an interaction effect between the primary and secondary market. We find that "smart salvaging" is more profitable and consumer friendly than charging customers to return products and then salvaging them en masse at rock bottom prices in secondary markets. More specifically: if there are exchanges and salvage values are below unit cost then, at equilibrium, it is optimal for retailers to increase restocking fees and prices, which increases profits but reduces customer satisfaction. When salvage values exceed unit cost, only prices increase while restocking fees are eliminated; which boosts both profits and customer satisfaction. Moreover, retailers that asymmetrically dominate their competitors in terms of salvaging can significantly outperform them with regard not only to sales and profits but also to returns policy leniency. This is a win-win outcome because it increases the utility of retailers and customers alike.
在线零售商在退货政策中对回收的最佳使用存在分歧。公司是否应该有限制性的退货政策,而不受限制地使用二级市场进行打捞,从而冒着供应过剩和打捞价值低的风险?或者,公司是否应该在限制二级市场规模的同时,采取宽松的退货政策,从而进行重复和昂贵的翻新活动?本文研究了具有内生回收价值的竞争环境下的最优退货决策问题。战略决策是零售商退货政策的两个组成部分:价格和补货费。我们将零售商的决策整合到双寡头结构中,在这种结构下,内生回收被建模为一级市场和二级市场之间的相互作用。我们发现,“智能回收”比向顾客收取退货费用,然后在二级市场以最低价格大量回收产品更有利可图,也更有利于消费者。更具体地说:如果存在交换和残值低于单位成本,那么,在均衡状态下,零售商最理想的做法是增加进货费用和价格,这增加了利润,但降低了客户满意度。当残余物价值超过单位成本时,只增加价格,而消除库存费用;这既提高了利润,又提高了客户满意度。此外,在回收方面不对称地支配竞争对手的零售商,不仅在销售和利润方面,而且在退货政策宽松方面,都能显著优于竞争对手。这是一个双赢的结果,因为它增加了零售商和消费者的效用。
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引用次数: 1
Learning from Inventory Availability Information: Evidence from Field Experiments on Amazon 从库存可用性信息中学习:来自亚马逊现场实验的证据
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2016-11-11 DOI: 10.2139/ssrn.2868218
Ruomeng Cui, Dennis J. Zhang, Achal Bassamboo
Many online retailers provide real-time inventory availability information. Customers can learn from the inventory level and update their beliefs about the product. Thus, consumer purchasing behavior may be impacted by the availability information. Based on a unique setting from Amazon lightning deals, which displays the percentage of inventory consumed in real time, we explore whether and how consumers learn from inventory availability information. Identifying the effect of learning on consumer decisions has been a notoriously difficult empirical question because of endogeneity concerns. We address this issue by running two randomized field experiments on Amazon in which we create exogenous shocks on the inventory availability information for a random subset of Amazon lightning deals. In addition, we track the dynamic purchasing behavior and inventory information for 23,665 lightning deals offered by Amazon and use their panel structure to further explore the relative effect of learning. We find evidence...
许多在线零售商提供实时库存可用性信息。客户可以从库存水平中学习,并更新他们对产品的信念。因此,消费者的购买行为可能受到可用性信息的影响。基于亚马逊闪电交易的独特设置,它实时显示库存消耗的百分比,我们探索消费者是否以及如何从库存可用性信息中学习。由于内生性问题,确定学习对消费者决策的影响一直是一个众所周知的困难的实证问题。我们通过在亚马逊上运行两个随机现场实验来解决这个问题,在实验中,我们为亚马逊闪电交易的随机子集创建了库存可用性信息的外生冲击。此外,我们跟踪了亚马逊23,665笔闪电交易的动态购买行为和库存信息,并利用它们的面板结构进一步探索学习的相对效果。我们找到了证据……
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引用次数: 75
Global Value Chains, Innovation, and Performance: Firm-Level Evidence from the Great Recession 全球价值链、创新与绩效:来自大衰退的企业层面证据
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2016-10-01 DOI: 10.2139/ssrn.2512641
Emanuele Brancati, R. Brancati, A. Maresca
This article takes advantage of a newly available survey on the Italian industry to analyze the behavior of global value chains (GVCs) in the aftermath of the Great Recession. We design a comprehensive taxonomy of GVC participation modes and explore their impact on firms’ innovativeness and performance. Our findings highlight relevant heterogeneities in how GVC participants fared the crisis. While high-skill relational suppliers display a significant propensity to engage in innovative activities and R&D projects, other modes of GVC participation have no premium compared to domestic companies. This heterogeneity is also reflected in differential productivity and sales growth. Compared to the precrisis trends, we document a severe demand shock for low-skill and subordinated firms, while relational GVCs appear to be somewhat sheltered from the effects of the crisis.
本文利用一项最新的意大利工业调查来分析大衰退后全球价值链(GVCs)的行为。我们设计了全球价值链参与模式的综合分类,并探讨了它们对企业创新和绩效的影响。我们的研究结果突出了全球价值链参与者如何应对危机的相关异质性。虽然高技能的关系供应商表现出参与创新活动和研发项目的显著倾向,但与国内公司相比,其他参与全球价值链的模式没有溢价。这种异质性也反映在生产率和销售增长的差异上。与危机前的趋势相比,我们记录了对低技能和从属企业的严重需求冲击,而关系型全球价值链似乎在一定程度上没有受到危机的影响。
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引用次数: 75
Warranty Inventory Optimization with Advance Supply Information 基于提前供应信息的保修库存优化
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2016-08-02 DOI: 10.2139/ssrn.2817694
J. Khawam, W. H. Hausman
In warranty inventory management, customers return allegedly malfunctioning products for replacement. Useful products may be recovered through testing and/or remanufacturing processes. The company must decide on the number of new units to purchase from a production line each period. This decision depends on an array of complex factors including stochastic demand rates, probabilistic yields from both the testing and remanufacturing processes, multiple sources of supply originating from both the stochastic reverse channel and the company's purchasing decisions, and varying levels of information regarding reverse pipeline inventory; we call this latter concept Advance Supply Information (ASI).In this paper we combine all of these elements to formulate a model that analyzes these tactical decisions and the value of ASI in this setting. We use dynamic programming to develop analytical models that determine the optimal ordering decisions under various levels of reverse channel visibility. The curse of dimensionality prohibits us from solving for optimal policies in all cases; thus, we develop heuristic dynamic programs using an aggregated state space that allow for tractable models while incorporating information gained from the pipeline visibility.
在保修库存管理中,客户退回据称有故障的产品以进行更换。有用的产品可以通过测试和/或再制造过程回收。公司必须决定每期从生产线上购买的新产品的数量。该决策取决于一系列复杂因素,包括随机需求率、测试和再制造过程的概率收益率、随机反向渠道和公司采购决策产生的多种供应来源,以及有关反向管道库存的不同信息水平。我们将后一种概念称为提前供应信息(ASI)。在本文中,我们将所有这些元素结合起来,形成一个模型来分析这些战术决策和ASI在这种情况下的价值。我们使用动态规划来开发分析模型,以确定在不同级别的反向通道可见性下的最优排序决策。维度的诅咒使我们无法在所有情况下找到最优策略;因此,我们使用聚合状态空间开发启发式动态程序,该空间允许可处理的模型,同时结合从管道可见性中获得的信息。
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引用次数: 0
Would You Like to Upgrade to a Premium Room? Evaluating the Benefit of Offering Standby Upgrades 您想升级到高级房间吗?评估提供备用升级的好处
IF 0.3 4区 工程技术 Q4 ENGINEERING, MANUFACTURING Pub Date : 2016-07-11 DOI: 10.1287/msom.2016.0596
Övünç Yılmaz, Pelin Pekgün, Mark E. Ferguson
An important challenge faced by hotels is how to set their premium room price differential over their standard rooms and how to manage the upsell process. Standby upgrades, where the customer is only charged if the upgrade is available at the time of arrival, is one technique that has become increasingly popular in practice for monetizing the premium room inventory that may otherwise go unused. We develop a model of premium room and standby upgrade pricing under an uncertain market size and examine how and when standby upgrades can provide additional revenue for a hotel. When guests are myopic, we show that standby upgrades can be used as a powerful price discrimination tool, especially for hotel properties with high premium-to-standard room ratios. When guests are strategic, the benefit of standby upgrades is significantly diminished; we show that standby upgrades only increase revenue when the hotel property has a low premium-to-standard room ratio. Our findings thus provide guidance on the hotel types and environments that are most suitable for standby upgrades. The online appendix is available at https://doi.org/10.1287/msom.2016.0596 .
酒店面临的一个重要挑战是如何设定高级客房与标准客房之间的价差,以及如何管理追加销售过程。待机升级是一种越来越受欢迎的技术,它可以将未被使用的高级客房库存货币化。我们开发了一个不确定市场规模下的高级客房和备用客房升级定价模型,并研究了备用客房升级如何以及何时能为酒店带来额外收入。当客人目光短浅时,我们发现待机升级可以作为一种强大的价格歧视工具,特别是对于高溢价与标准房之比的酒店物业。当客人是战略客人时,待机升级的好处就会大大减少;我们发现,只有当酒店的高级客房与标准间之比较低时,待机升级才会增加收入。因此,我们的研究结果为最适合待机升级的酒店类型和环境提供了指导。在线附录可在https://doi.org/10.1287/msom.2016.0596上获得。
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引用次数: 26
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Manufacturing Engineering
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