人工智能时代个性化定价行为的反垄断规制--从大数据杀熟展开

人工智能时代,数据规模显著扩张,算法能力持续优化。科技实力雄厚、市场力量强大的经营者凭借大数据与算法工具的紧密结合,收集和分析能够反映消费者特征和行为的相关信息,以无限接近消费者购买能力和支付意愿上限的方式对消费者实施个性化定价。个性化定价行为涉及对条件相同的交易相对人在交易价格上实施差别化待遇,可能构成反垄断法所禁止的价格歧视行为。但与以往反垄断实施重点关注的排他性价格歧视不同,个性化定价突出表现为直接针对终端消费者实施的剥削性价格歧视,且在具体情形下呈现出不同的限制竞争效果,引发消费者选择能力与选择范围的双重限制。鉴于此,个性化定价行为的反垄断规制需要准确识别涉案行为,综合判断竞争效果,慎重选择福利标准。对于同时降低消费者剩余和社会总福利的个性化定价行为,可认定其具有限制竞争效果且不具备正当理由,从而构成违法价格歧视;对于降低消费者剩余却提高社会总福利的个性化定价行为,如果选择消费者福利标准则可认定其构成违法价格歧视,如果选择社会总福利标准则可认定其具备正当理由;对于同时提高消费者剩余与社会总福利的个性化定价行为,因涉及消费者之间的剩余转移,对其竞争效果的评价仍待反垄断实施予以明确。     

Social Network-Based Discriminatory Pricing Strategy

In this paper we study such pricing practices like MCI's Friends and Family Program that employ price discriminations on the basis of callers' social ties. We characterize a consumer's personal communication network by the number of strong and weak ties that the consumer has. We then derive a consumer's demand for communication service from the structure of the consumer's personal communication network. A monopoly firm's social network-based discriminatory pricing strategy consists of a menu of price plans, each plan targeting at one type of social networks. Our paper provides useful guidelines for the design of optimal social network-based discriminatory pricing strategies. We show that a firm may offer price discounts to communications between friends and family members in order to extract a larger profit from communications between callers with weak ties.     

Intertemporal price discrimination with forward-looking consumers: Application to the US market for console video-games

Firms in durable good product markets face incentives to intertemporally price discriminate, by setting high initial prices to sell to consumers with the highest willingness to pay, and cutting prices thereafter to appeal to those with lower willingness to pay. A critical determinant of the profitability of such pricing policies is the extent to which consumers anticipate future price declines, and delay purchases. I develop a framework to investigate empirically the optimal pricing over time of a firm selling a durable-good product to such strategic consumers. Prices in the model are equilibrium outcomes of a game played between forward-looking consumers who strategically delay purchases to avail of lower prices in the future, and a forward-looking firm that takes this consumer behavior into account in formulating its optimal pricing policy. The model outlines first, a dynamic model of demand incorporating forward-looking consumer behavior, and second, an algorithm to compute the optimal dynamic sequence of prices given these demand estimates. The model is solved using numerical dynamic programming techniques. I present an empirical application to the market for video-games in the US. The results indicate that consumer forward-looking behavior has a significant effect on optimal pricing of games in the industry. Simulations reveal that the profit losses of ignoring forward-looking behavior by consumers are large and economically significant, and suggest that market research that provides information regarding the extent of discounting by consumers is valuable to video-game firms.

Successful New Product Pricing Practices: A Contingency Approach

The purpose of this study is to examine the success of new product pricing practices and the conditions upon which success is contingent. We distinguish three different pricing practices that refer to the use of information on customer value, competition, and costs respectively. Following Monroe's (1990) price discretion, we argue that the success of these practices is contingent on relative product advantage and competitive intensity. The hypotheses are tested on pricing decisions for new industrial products. Our results show that there are no general best or bad practices, but that a contingency approach is appropriate. These results may help reduce the complexity that managers experience in pricing new products.     

easyJet® pricing strategy: Should low-fare airlines offer last-minute deals?

easyJet, one of Europe’s most successful low-cost short-haul airlines, has a simple pricing structure. For a given flight, all prices are quoted one-way, a single price prevails at any point, and, in general, prices are low early on and increase as the departure date approaches. We observe from these policies and from the empirical section of this paper that easyJet employs three distinct strategies: 1) it does not offer last-minute deals, 2) it offers a single class and lets price be the sole variable that controls demand, and 3) it varies the time at which tickets are first offered for sale (duration of sale). The first two policies are in stark contrast to traditional airline pricing strategies. Many airlines offer last-minute deals, either directly or via resellers. Second, the current prevailing practice is to control demand via seat allocation to various classes rather than by offering a single class and letting price be the sole variable that controls demand. The main objective of this research is to study the conditions under which offering a last-minute deal is optimal under the single-price policy. We also learn how the duration of ticket sales is affected by consumer characteristics. We find that, for an intermediate capacity level, uncertainty with respect to the arrival of the business segment will cause the firm to offer last-minute deals and thus partially price-discriminate within the tourist segment. The same is true for uncertainty with respect to the actual behavior of the firm: if consumers are uncertain whether the firm will offer last-minute deals, then, in equilibrium, both in a one-shot game and in a repeated game, the firm will, with some probability, offer such deals. In addition, we found that for an intermediate capacity level, the larger the number of segments (that differ in price sensitivity), the longer the duration of the period in which tickets are offered for sale.

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Manufacturer-Optimal Wholesale Pricing When Retailers Compete

The existing marketing science literature on channels of distribution has emphasized pricing strategies that maximize either channel or manufacturer margin. This emphasis has implicitly assumed that optimal wholesale prices are independent of any fixed fees charged by the manufacturer. While this assumption is justified in a single-manufacturer, single-retailer world, it generally does not lead to manufacturer profit maximization in a world of competing retailers. In this paper we derive a manufacturer-optimal wholesale pricing strategy by simultaneously determining both elements of a two-part tariff (consisting of a wholesale price and a fixed fee). We show that the manufacturer will always prefer this sophisticated pricing strategy to one that maximizes either channel or manufacturer margin. We also show that both elements of the optimal tariff are functions of the absolute difference between retailer fixed costs.     

Understanding how consumer education impacts shoppers over time: A longitudinal field study of unit price usage

There remains a lack of empirical evidence for what constitutes effective consumer education around unit pricing in grocery stores, despite researchers continually highlighting the importance of such education. Much of the early work on unit pricing describes self-report estimates of usage, or results of simulated shopping studies which can lack external validity. The current research reports one of the first longitudinal field experiments to examine the impact of consumer education on unit price usage over time, and is based on shoppers' actual grocery spending. Shoppers receiving consumer education displayed progressively higher levels of savings across the first six weeks of the study to a peak of about 17–18%, declining to around 11–13% by the end of the study. Savings were achieved by shoppers from all income levels, and increased with the provision of personalized comparative feedback. The study offers theoretical insights and important practical implications for retailers and policy makers.     

Currency Substitution and Price Endings: Right Digit Effect

ABSTRACT

The strategic manipulation of prices. rightmost digits has been a tactic used by retailers in the western world for decades. By studying the internationalization of pricing tactics in a global economy, our research adds a much needed contribution to the literature of price endings and pricing tactics in global markets. We find that at lower price levels, consumers exposed to a 99 ending price in a currency substitution market are more likely to purchase the product compared to consumers in the US market. At higher price levels, on the other hand, consumers in either market situation exhibit no change in purchase intentions. Thus, the 99 ending tactic has no effect on consumers when the product is expensive. The use of the right digit effect by managers in a currency substitution/ dollarized economy as a way of persuading consumers to buy is still likely to be more successful compared to the USA market. As such, firms in a dollarized economy should structure their pricing strategies while taking into consideration the type of product they are offering and the consumer market they are dealing with.     

Balancing Profitability and Customer Welfare in a Supermarket Chain

We investigate the impact of price discrimination by a large Chicago supermarket chain. First we measure the impact of the chain's current zone-pricing policy on shelf prices, variable profits and consumer welfare across its stores. Using the chain's database to simulate a finer store-specific micro-pricing policy, we study the implications of this policy on profits and welfare. We show how a store-pricing policy that is constrained to offer consumers at least as much surplus as a uniform chain wide pricing policy still enables the retailer to generate substantial incremental profits.To ensure our pricing problem exhibits a well-defined optimum, we use the parsimonious, mixed-logit demand function that allows for flexible substitution patterns across brands and also retains a link to consumer theory. We discuss the issue of price endogeneity when estimating the demand parameters with weekly store-level data. Standard instrumental variables techniques used to account for such endogeneity also seem to increase the magnitudes of own-price elasticities thereby offsetting the problem encountered by previous researchers of predicted prices from a demand model exceeding those in the actual data.     

Uniform or spatially differentiated? Pricing Strategies for Information Goods under simultaneous and sequential decision-making in multi-market context

Product pricing has been one of the central issues in the field of marketing and consumer services for managers and researchers alike. However, pricing of information goods has not been paid much attention in literature. For information goods the marginal costs of production and transportation of information goods (online movies, video games, etc.) is almost zero. Hence, the pricing decisions need to be thought of purely in competitive profit maximizing terms. This paper proposes mechanisms for managers to evaluate and base their pricing decisions on rational frameworks that takes into account various situations when they enter a new market and when they are incumbent in a new market. This paper addresses the research gap of spatially differentiated pricing strategy for information goods that has not been studied in literature so far. We create stylized theoretical models under both, sequential and simultaneous decision-making conditions. We determine the equilibrium price and the equilibrium profit for the two firms for each of the four possible scenarios based on their pricing strategies. Our analysis reveals that the dominance of one pricing strategy over the other depends on product differentiation factor capturing joint effect of the product substitutability and consumer's price sensitivity under sequential decision making and the market size along with consumer's price sensitivity for simultaneous decision making. As an extension, we propose a generalized model demonstrating the uniform and spatially differentiated pricing strategies of the firms under simultaneous and sequential selection for multiple domestic and international markets.     

A cost-plus trap: Pricing heuristics and demand identification

Cost plus pricing is a common pricing heuristic. We investigate whether a firm, following cost plus pricing in a simple environment, will eventually have enough information about demand conditions to switch to an optimization-based pricing approach. We find that with unsophisticated statistical approaches this is unlikely, and even with a Bayesian decision theoretic approach there can be what we call a cost plus trap.     

Price Intransparency,Consumer Decision Making and European Consumer Law

Price comparison is a basic element of competition. For comparison to work, at least prices need to be transparent. Moreover, price is usually a focal point in consumer thinking and deciding on transactions. Hence, obfuscating prices can be detrimental to consumers. Therefore, it is vital for policymakers to know how transparent pricing is in reality. Commercial practices involving price intransparency can be detrimental to consumer decision making and may be associated with market failure. So, legislative intervention to ensure price transparency is sometimes warranted. Suppliers may disclose and frame pricing information in such ways as to influence consumers. For some suppliers, advantages may be gained by obfuscating price—through practices ranging from the outright hiding of price terms in the small print to subtle ways of throwing in gifts or adding charges during the vending process. Do consumers appreciate the implications of the fact that by framing price in different ways suppliers actually try to influence their demand for products? And how does the law broadly speaking respond to problems of price intransparency? In this article, behavioural science insights are combined with a legal analysis of European consumer law in order to chart some of the detrimental influences of price intransparency on the consumer decision-making process and to answer whether and to what extent European consumer law addresses these issues. In doing so, this article first reviews research from consumer psychology, marketing, and behavioural law, and economics regarding the influence of presentation, framing, and transparency of price on the consumer decision-making process. Subsequently, it describes and evaluates the legal framework offered by European consumer law and how this framework responds to practices of price intransparency. Particular problematic pricing techniques are identified and discussed. In conclusion, attention is drawn to the disadvantages of the increasing full harmonization character of European consumer law for combating price intransparency at Member State level.     

基于在线评论的网络零售定价模型研究

在线评论的出现深刻改变着消费者的经济行为模式、企业的赢利性及其定价策略。文章以消费者效用理论为理论基础,以网络零售两阶段销售为背景,建立了一个与在线评论相关的产品定价模型。通过数值模拟发现,在线评论数量越大,则第一阶段产品最优价格越低,第二阶段产品最优价格越高,网络零售商的总利润也越大;第一阶段消费者对产品价值的预期越高,则第一阶段产品最优价格越高,第二阶段产品最优价格越低,而只有当在线评论数量较小时,网络零售商的总利润才随第一阶段消费者对产品价值的预期增加而增加,否则,网络零售商的总利润将随第一阶段消费者对产品价值的预期增加而减少。     

Inflation inertia and credible disinflation

We develop a model of optimizing forward-looking staggered price setting where even fully credible disinflations display a delayed and gradual inflation response and significant output losses. There is a welfare trade-off between these output losses and the gains from smaller inflationary distortions. For reasonable parameter values disinflation improves welfare, and more so if it is phased in gradually. The pricing assumption of our model yields dynamics that are similar to models of sticky information, but its state space is much simpler, thereby allowing for the application of standard linearization methods.     

Is transparency a good thing? How online price transparency and variability can benefit firms and influence consumer decision making

The internet has empowered consumers and changed the way they search and shop for products and services by increasing the availability and transparency of pricing and other comparative information. However, what is less clear from a managerial perspective is just how transparent pricing information should be. While it might seem that increasing price transparency would reduce consumer search, we find that it may actually increase search and delay. In this article, we review the use of firms’ application of price transparency in practice and propose that specific types of information can influence how transparent prices are to consumers, and how such transparency can influence consumer decisions in a way that is beneficial for the firm. We focus on a specific form of transparency: whether or not the consumer knows the range of pricing. We also discuss whether a high variability pricing approach versus a low variability pricing approach influences consumer decision making—and whether this influence is moderated by transparency.     

Price discrimination in service industries

This article outlines recent methods and applications directed at understanding the profit and consumer welfare implications of increasingly prevalent price discrimination strategies in the service sector. These industries are typically characterized by heterogeneity in consumers?? valuation and usage of the service, resale constraints, and a focus on price as the service??s key attribute. The article focuses on how firms use nonlinear pricing or bundling strategies to benefit from the heterogeneity in consumer demand. We describe the basic economic model commonly used in the literature to analyze such strategic choices and present recent methodological improvements to this benchmark. A discussion of existing applications and future research opportunities concludes the article.     

Monopoly Prices versus Ramsey-Boiteux Prices: Are they “Similar”, and: Does it Matter?

Ramsey-Boiteux prices and monopoly prices are frequently regarded as being similar. This might suggest that sometimes monopoly pricing is close to the Ramsey-Boiteux second best and welfare superior to imperfectly regulated prices. This paper tries to specify what is meant by “being similar”. Both sets of prices are similar in a theoretical sense but differ not only with respect to price levels but can even lead to different price orders. The paper discusses the impact of competition and stresses the difference between market and residual demand, which are important for the Ramsey-Boiteux and the monopoly problem, respectively. JEL classification  L33, L50, L94     

Brand and Quantity Choice Dynamics Under Price Uncertainty

We develop a model of household demand for frequently purchased consumer goods that are branded, storable and subject to stochastic price fluctuations. Our framework accounts for how inventories and expectations of future prices affect current period purchase decisions. We estimate our model using scanner data for the ketchup category. Our results indicate that price expectations and the nature of the price process have important effects on demand elasticities. Long-run cross price elasticities of demand are more than twice as great as short-run cross price elasticities. Temporary price cuts (or deals) primarily generate purchase acceleration and category expansion, rather than brand switching.     

基于双边市场理论的物流信息平台定价策略研究

面向车货匹配的物流信息平台具有典型的双边市场特征,而价格是物流信息平台与其双边用户货主和车主利益博弈的主要工具。本文运用双边市场理论分析了物流信息平台的定价问题。文章分别从垄断平台双边定价和单边定价的角度给出了物流信息平台最优定价决策,并进行了对比分析和敏感性分析,最后扩展到竞争平台的定价决策。通过建模分析发现,物流信息平台对货主的定价与货主的网络效应强度有关,当货主的网络效应强度大于车主的网络效应时对货主收费,否则对货主免费或补贴;物流信息平台对于车主的定价与车主的增值服务效益成负相关关系,当车主为平台带来的增值服务收益大于某临界值时对车主免费甚至补贴;物流信息平台单边收费时的总利润低于双边收费时的平台总利润。最后结合我国车货匹配市场,以某物流信息平台为对象进行了案例分析。     

Price competition during and after promotions

We provide a framework for setting regular prices and using promotional discounts in a duopoly where long‐term promotional effects are present and the firms' pricing and promotional strategies are common knowledge (e.g., as in online markets). We show that at equilibrium, the two firms may not promote and instead adopt an Everyday Low Price (EDLP) strategy. Consumers' tendency to stockpile promoted products, the level of brand loyalty and product differentiation, and the possibility of a postpromotional sales increase critically influence regular prices, price discount rates, and profits. Under some conditions consumer stockpiling intensifies promotional competition and reduces firms' profits while the possibility of attracting new consumers reduces the need to heavily promote and ensures better profits. Managerial implications are discussed. Copyright © 2007 ASAC. Published by John Wiley & Sons, Ltd.