The Impact of Private Label Introduction on Assortment,Prices, and Profits of Retailers*

We study how introducing private-label brands (PLs) affects retail prices and profits, accounting for assortment adjustments of national brands (NBs). We employ an event-study framework and scanner data on the US beef market. When a PL is added to the low-priced market segment, we find that retail stores further differentiate NBs from the PL and remove same-segment NBs. When a PL is added to the high-priced segment, however, NB assortment changes are limited. PL introduction and PL-driven NB assortment changes impose small price effects on NB, but strongly cannibalize NB demand and steer consumers toward PLs, likely increasing store profits.     

服装店铺服务属性层级体系的研究

作为零售终端的服装店铺,其优质健全的顾客服务对每一个服装公司来说都至关重要。建立完善的服装店铺服务属性层级体系,有助于研究哪些服装店铺服务属性对服装消费决策影响较大,帮助企业赢得顾客并获得更多利润。从"服务"的定义出发,在回顾相关文献的基础上,通过实地考察对店铺服务属性进行补充,并结合专家访谈法和问卷调研法,提出服装店铺服务属性的层级体系。研究还发现,不管是男性消费者还是女性消费者,最关注的前两位店铺服务属性都是店员服务态度和店内服务设施,男性消费者比女性消费者更加关注售后服务和店员补救能力,女性消费者则更看重店员沟通能力和商品陈列。     

Assessing the effect of food retail subsidies on the price of food in remote Indigenous communities in Canada

The Canadian government currently subsidizes food retailers in the 25 remote communities in Nunavut through the Nutrition North Canada program. The program expects each dollar of the food subsidy to be fully passed on to the consumer in the form of lower prices. Unfortunately, existing audits and reviews of the program have failed to determine the pass-through rate of the subsidy. Using regression analysis on food price data in each of the 25 communities, subsidy rates, and covariates that control for community characteristics, we overcome the limitations of past research and provide the first-ever estimate of the pass-through rate of Nutrition North in Nunavut. Our results suggest that most, if not all, of the subsidy is passed on to the consumer in lower food prices.     

回收质量不确定下的竞争性闭环供应链政策机制研究

本文主要探讨了回收质量不确定下的竞争性闭环供应链的政府政策机制,建立了4种情形下的竞争性闭环供应链分散式决策模型,研究了3种政策机制对闭环供应链回收率、总碳排放量和制造商利润的影响,模型由两个制造商和一个第三方回收商构成。结果表明：回收率和制造商利润受到回收质量的影响,存在最佳回收质量系数使回收率最高以及制造商总利润最高,最佳回收质量系数受到碳税的影响;补贴与碳税相结合机制更能有效的引导回收、降低总碳排放量以及激励一般制造商进行再制造。最后,通过算例分析进行了验证。     

ANOTHER LOOK AT PRICE PROMOTION*

Weekly sales at retail stores exhibit several patterns that the literature on price promotion does not fully capture. In this paper we develop a simple symmetric model where duopoly manufacturers distribute through a monopoly retailer to serve consumers with heterogeneous reservation prices. We show that the heterogeneity in consumers' reservation prices coupled with the retailer's market power is sufficient to resolve the deficiency in the literature. We then show that, while pricing patterns under this model differ significantly from those under a model where the retailer has no market power, the manufacturers' expected profits are the same in both cases.     

Reducing food waste through digital platforms: A quantification of cross-side network effects

To fight food waste, retail stores have begun selling perishable food close to the expiration date at discounted prices. To render this form of last-minute discounting effective, digital platforms have been developed with the major aim to connect local retail stores and their consumers by sharing information about these discounts. To sustain digital platforms, platform leaders need to ensure both consumers and retail stores remain active on it. To provide platform leaders with advice on how to create a sustainable digital platform, we examine how retail store activity on the digital platform affects consumer activity, and vice versa (also known as cross-side network effects). By combining a PVAR model and an impulse response function, along with data from a digital platform aimed at food waste reduction, we find that the effect of consumer activity on retail store activity is stronger and more long-lasting than the effect of retail store activity on consumer activity. We discuss the implications of our findings for both retail stores and digital platform leaders.     

Search Costs and Price Dispersion in a Localized,Homogeneous Product Market: Some Empirical Evidence

Convenience stores provide an opportunity to compare the price dispersion that occurs for gasoline, which is characterized by relatively low search and information costs to consumers, with that of in-store items, which are characterized by relatively high search and information costs to consumers. The results obtained from this study support the hypothesis that differences in search and information costs for consumers play a significant role in explaining the observed price dispersion that occurs for homogeneous items sold at convenience stores.     

市场化减排政策对我国钢铁行业的影响——基于偏均衡建模的分析

论文运用偏均衡建模的方法,分析了市场化减排政策对于我国钢铁行业竞争力的影响。论文采用基于减排技术组合的减排成本曲线,分析了不同的障碍情景下,引入市场化减排政策对于钢铁价格、进出口价格、进出口量、净出口、利润和排放等关键参数的影响。文章发现市场化减排政策尽管可以大幅度地降低CO2排放量,但是对钢铁行业的竞争力存在一定程度的负面影响,主要体现在净出口和利润的降低。而降低减排技术的采用障碍会弱化减排政策实施对钢铁行业的负面效果。此外,通过对两种边境调节措施的分析（出口补贴和进口品征税）发现,出口补贴政策对于行业净出口和利润的积极作用非常微弱,相较而言进口品征税政 策对于行业净出口和利润的提高作用更为明显,但同时二者均会轻微的削弱减排效果。     

Keeping it fresh: Strategic product redesigns and welfare

Product redesigns happen across virtually all types of products, yet there is little evidence on the market and welfare effects of redesigns. We develop a model of redesign decisions in a dynamic oligopoly model and use it to analyze redesign activity in the U.S. automobile market. We find automobile model redesigns are frequent despite an estimated average cost around $1 billion. Our estimates also suggest that redesigns lead to large increases in profits and welfare due to the strong preferences consumers have for redesigns. We show that welfare would be improved if redesign competition were reduced, allowing redesign activity to be more responsive to the planned obsolescence channel. The net effect of these changes would reduce total redesigns by roughly 10%, increasing total welfare by roughly 3%. The high valuation that consumers put on newly-designed models drives frequent redesigns and gives automobile manufacturers fairly substantial market power, with a 2-to-1 ratio of firm profits to consumer surplus.     

On two-part tariff competition in a homogeneous product duopoly

We explore aspects of two-part tariff competition between duopolists providing a homogeneous service when consumers differ with respect to their usage levels. Competition in only one price component (the fee or the rate) may allow both firms to enjoy positive profits if the other price component has been set at levels different enough between firms. Fixing one price component alters the nature of competition, indirectly introducing an element of product differentiation. Endogenous market segmentation emerges, with the heavier users choosing the lower rate firm and the lighter users choosing the lower fee firm. When no price component can be negative, competition becomes softer, profits tend to be higher but there is also a disadvantage for the firm that starts with a higher fee than that of its rival.     

Stackelberg price leadership in spatial competition

This paper examines Stackelberg price leadership in a spatially competitive model with infinitely many stores on an infinite line. A Stackelberg price leader charges significantly more than the pure Nash equilibrium price, induces its neighbors to charge somewhat more than the pure Nash equilibrium price, and increases its profits. Under Nash equilibrium, collusion of two stores makes a difference to prices only if the colluding stores are nearest neighbors. Under Stackelberg price leadership, collusion makes a difference to prices even if the stores are not nearest neighbors.     

Non-linear pricing and conscious consumption

We consider a duopolistic market in which a green firm competes with a brown rival and each firm sells two quality-differentiated products. We study optimal non-linear contracts offered by the two firms when consumers: (i) Are privately informed about their willingness to pay for quality, and (ii) differ in their environmental consciousness. We characterize how consumers with different valuations for quality self-select into firms and show that the ranking of qualities, relative prices and profits all depend on the interplay between consumers’ valuations and firms’ cost heterogeneity. Interestingly, when consumers’ valuations for quality are relatively low, the brown firm does not offer a low-quality variety. This contrasts with the situation of full information, in which both firms commercialize a high- and a low-quality variety. Hence, the lack of information about consumers’ valuations may not only favor the green firm in terms of higher prices and profits, but also reduce the product range offered by the brown rival.     

The political economy of food subsidy reform: the case of Egypt

This paper examines the political economy of food subsidy reform efforts in Egypt. Egypt provides a case of a country with a large food subsidy program that has been relatively effective as a social safety net, but a program that is also expensive and poorly targeted to the needy. Policy discussions about strategies to improve the system’s performance run into the extreme political sensitivity of the issue of food subsidies in Egypt. Food subsidies are perceived to be important in promoting political stability and providing some legitimacy to a political system where civil liberties are limited. Egypt therefore illustrates the dilemmas facing policymakers and others contemplating food subsidy reform in developing countries where there are concerns that reform may spark political unrest. This paper argues that even in cases where food subsidy reform is a highly politicized issue, there are still a number of pragmatic policy steps that can be taken that meet the twin goals of reforming the system in ways that better target the poor while functioning more efficiently.     

基于零售商开通网络渠道的多渠道供应链定价策略

文针对拥有网络直销渠道的制造商,考虑零售商实体渠道促销努力水平及消费者的搭便车行为,在 Nash博弈和零售商主导的Stackelberg 博弈下,就零售商开通网络渠道的问题进行研究。通过理论和数值分析,得到以下结论：零售商渠道地位对其开通网络渠道影响不大;开通后,制造商利润减小,当实体渠道基本市场份额较小时,零售商利润增大;零售商应根据实体渠道基本市场份额大小来决定是否开通网络渠道。     

The effectiveness of temporary marginal cost subsidies

The principal aim of a marginal cost subsidy program is to accelerate improvements in economic performance that would occur anyway if anticipated changes in the relevant economic determinants were to realise. The potential effectiveness of such a program is studied in a framework that allows firms to have stochastic beliefs as to the timing of the change in the economic environment and the ending of the subsidy program. Because the subsidies are typically of a temporary nature and apply only to incremental changes, they create an incentive for firms to actually postpone changes in performance. Leaving the ending date unspecified at the time of implementation of the program may counteract this incentive and results in an early accelerative response. The improvement in economic performance near the specified termination date for a program with a known length, however, may well be more substantial.     

Does a cassava research-for-development program have impact at the farm level? Evidence from the Democratic Republic of Congo

This paper evaluates the impact of a cassava research-for-development program on farm level outcomes. The program was implemented in the Democratic Republic of Congo from 2001 to 2009. We apply propensity score matching, Rosenbaum bounds on treatment effects, Altonji et al. method of selection on observables and unobservables and endogenous switching regression to farm survey data collected during the 2009 cropping season. We use these methods to test whether the R4D program has a statistically significant effect on outcomes of interest and if these are not driven by selection on unobservables. Using propensity score matching, we find statistically significant positive effects on household participation in cassava markets, adoption of improved varieties and crop management practices and household food adequacy; and no statistically significant effects on yields and profits. The results show that bias due to selection on unobservables is not severe enough to invalidate the impact estimates. Bias may still be a problem that is present in the analysis. But there is evidence that it is not substantial. Although the program does not have a statistically significant positive effect on yields and profits, the significant program effects on market participation, variety adoption, and food adequacy merit further promotion of the program since these positive outcomes tend to be pre-conditions for realizing long-term yield and profit benefits.     

Government Policies Supporting Open Source Software for the Mass Market

This paper analyzes the impact on social welfare of government policies supporting open source software (OSS). Mass-market consumers can be divided between those who are informed about the existence of OSS and those who are uninformed. Since OSS producers have little incentive to advertise, there may be a substantial mass of uniformed consumers, leading to market failures that may justify government intervention. We study three government policies: (a) mandated adoption, whereby the government forces public agencies, schools, and universities to adopt OSS, (b) information provision, whereby the government informs the uninformed users about the existence and the characteristics of OSS, and (c) subsidy, whereby the government makes a payment to consumers if they adopt OSS. We show that mandated adoption and information provision may increase social welfare, but the subsidy always reduces it. When network externalities are added to the model, we show that mandated adoption and information provision may increase social welfare if they help the market to tip towards standardization. The web site www.opensource.org provides further details on the open source software movement     

政府补贴对再制造闭环供应链的影响研究

本文在考虑消费者支付意愿存在显著差异、消费者和制造商存在不同政府补贴分配比例下,建立再制造博弈模型,探讨政府补贴再制造品对产品价格、需求以及对消费者、制造商、社会总收益的影响。结论表明,政府补贴有利于促进再制造品的需求,消费者剩余效用、制造商收益以及社会总收益都增加;政府补贴时应不允许制造商涨价,在考虑制造商积极性下尽量补贴给消费者;提高消费者环保意识才是促进再制造的根本途径。     

The Welfare Effect of Advertising Restrictions in the U.S. Cigarette Industry

The welfare effect of advertisingrestrictions in the U.S. cigarette industry dependsupon the impact of advertising on consumer and producer surplus, the transfer to consumers for being exposed to utility-reducing advertising, and smoking externalities. We estimate a demand equation and a supply relation simultaneously and use the parameter estimates to generate predictions of the impact of advertising restrictions on social welfare. Our results show that advertising restrictions benefit producers by limiting competition and generating higher industry profits, and such restrictions lower social welfare if the external cost of cigarette smoking is sufficiently low.     

Referrals in search markets

This paper compares the equilibrium outcomes in search markets with and without referrals. Although it seems clear that consumers would benefit from referrals, it is not at all clear whether firms would unilaterally provide information about competing offers since such information could encourage consumers to purchase the product elsewhere. In a model of a horizontally differentiated product market with sequential consumer search, we show that valuable referrals can arise in the equilibrium: a firm will give referrals to consumers whose ideal product is sufficiently far away from the firm's offering. We allow firms to price-discriminate among consumers, and consumers to misrepresent their tastes. We found that the equilibrium profits tend to be higher in markets with referrals than in markets without. Consumers tend to be better off in the presence of referrals when search costs are not too low, and under a certain parameter range, referrals lead to a Pareto improvement.