A Generalized Oligopoly Model

This paper generalizes and unifies the traditional quantity competition oligopoly models of Cournot and Stackelberg. Traditional oligopoly models predict that, under constant marginal costs, there will only be one market share (Cournot) or a single firm with a large market share and all others with the same market share (Stackelberg). Without altering the basic assumption set, in particular the assumptions of common marginal cost functions, perfect information and linear demand, the paper presents a general model that may be useful to explain many real‐life situations of oligopoly competition, where many different market shares may coexist. Finally, it is shown that certain existing social welfare results are robust to the generalization.     

An empirical assessment of the welfare effects of reciprocal dumping

Can two-way trade in similar products lead to lower welfare than if such trade was banned? Theory answers yes. To empirically investigate this proposition we examine Swedish imports of bottled water. Assuming one-shot (Bertrand and Cournot) competition, we can use the estimates from a structural model of demand to uncover marginal costs. We simulate the effect on consumer and producer surplus of banning imports. We do not find convincing evidence that banning imports would increase overall welfare. Given our choice of market this suggests we should not be overly concerned with the welfare effects of two-way trade in consumer goods that are close to homogenous.     

Product Differentiation,the Volume of Trade and Profits under Cournot and Bertrand Duopoly

This article analyses how product differentiation affects the volume of trade under duopoly using Shubik-Levitan demand functions rather than the Bowley demand functions used by Bernhofen (2001). The drawback of Bowley demand functions is that an increase in product differentiation increases the size of the market so the increase in the volume of trade may be the result of the increase in the size of the market rather than the increase in product differentiation per se. The Shubik-Levitan demand functions have the advantage that an increase in product differentiation does not increase the size of the market, but consumers still have a ‘love of variety’. It is shown that the volume of trade in terms of quantities falls with increasing product differentiation when the trade cost is relatively low, but rises with increasing product differentiation when the trade cost is relatively high. Among the results, it is shown that the trade liberalisation is more likely to be profitable under Cournot duopoly than under Bertrand duopoly for differentiated products with a positive trade cost.     

Foreign entry and domestic welfare: lessons for developing countries

This paper examines the effects of foreign entry, in the form of either imports or direct foreign investment, into an oligopolistic market. Incorporating a possible divergence between private and social costs, it first derives simple conditions under which foreign entry reduces welfare relative to autarky. Then, in a multi-firm Cournot model with linear demand and international cost asymmetries, it shows that foreign entry reduces welfare unless it captures a very large share of the home market. However, it also shows that an optimal tariff can prevent this welfare decline. Some suggestive empirical evidence and extensions to differentiated products and to merger analysis are offered. The paper concludes with implications for trade and investment liberalization, as well as for domestic and international competition policy.     

International trade with endogenous mode of competition in general equilibrium

This paper endogenizes the extent of intra-sectoral competition in a multi-sectoral general-equilibrium model of oligopoly and trade. Firms choose capacity followed by prices. If the benefits of capacity investment in a given sector are below a threshold level, the sector exhibits Bertrand behavior, otherwise it exhibits Cournot behavior. By endogenizing the threshold parameter in general equilibrium, we show how exogenous shocks such as globalization and technological change alter the mix of sectors between “more” and “less” competitive, or Bertrand and Cournot, and affect the relative wages of skilled and unskilled workers, even in a “North–North” model with identical countries.     

Economies as an Antitrust Defense Revisited: The Welfare Trade-offs and Safe Harbors

This paper incorporates a Cournot model of oligopoly pricing into Williamson’s (1968a) model to assess the welfare effect of a merger that yields economies and market power simultaneously. The results show: (i) in most cases, economies from mergers can offset price increases due to market power such that there are positive net allocative effects, and (ii) the safe harbors in the merger guidelines may fail to screen out mergers correctly. The reliability, however, can be improved by considering cost savings and price elasticities in addition to the current use of increases in HHI and post-merger HHIs.     

Strategic trade policy with endogenous choice of quality and asymmetric costs

This paper examines strategic trade and joint welfare maximizing incentives towards investment in the quality of exports by an LDC and a developed country. Firms first compete in qualities and then export to an imperfectly competitive, third country market. Under Bertrand competition, unilateral policy involves an investment subsidy by the low-quality LDC and an investment tax by the developed country, whereas jointly optimal policy calls for the reverse so as to reduce price competition by increasing product differentiation. Under Cournot competition, unilateral policy is also reversed from the Bertrand outcome, but jointly optimal policy involves a tax in both countries.     

Entry and Component Pricing in Regulated Markets

This paper discusses work on computable models of entry into regulated markets. Cournot, Stackelberg and Fringe entry are considered for the case where the incumbent operator‘s profitability is regulated and component pricing influences the desirability of entry. The simulation results illustrate that welfare optimal component pricing can be highly sensitive to model specification (behavioural assumptions about agents, the nature of competition, the extent of product differentiation etc.) and that no welfare ranking of simple component pricing rules (such as marginal cost, average cost, opportunity cost or efficient component price) exists. In addition, the welfare desirability of entry is seen to be sensitive to the choice of welfare benchmark for comparison     

Migration,Unemployment and Trade

Using an oligopoly model of trade with asymmetric costs, we study the individual and world welfare implications of a hub and spoke trade agreement where the hub country is more efficient than spoke countries. Under a hub and spoke trade regime, the hub country can benefit at the expense of the spokes relative to free trade. Furthermore, if the hub is sufficiently efficient compared to the spokes, such a regime can yield higher global welfare than free trade. Preferential treatment of the efficient hub country in its export markets improves world welfare because it helps allocate a larger share of the world’s output to a low cost location.     

Differentiation and Cost Asymmetry: Solving the Merger Paradox

This paper investigates the impact of product differentiation and of cost asymmetry on the merger paradox using a Cournot framework. It finds that when all firms share the same costs, two-firm mergers in an n firm market generate at least no profit loss when goods are sufficiently differentiated. This result contrasts with that of Salant, Switzer, and Reynolds (1983) where mergers of strategic substitutes are rarely profitable, and Deneckere and Davidson (1985 Deneckere, Raymond, and Carl Davidson. 1985. Incentives to Form Coalitions with Bertrand Competition. The RAND Journal of Economics 16 (4): 473–486.[Crossref], [Web of Science ®] , [Google Scholar]) where competition among strategic complements yields profitable mergers. Critically, when costs are asymmetric, a merger between an efficient and inefficient firm, with differentiated products, can be more profitable to participants than to excluded rivals. Following this merger, welfare is shown to increase given that the cost asymmetry between insiders is large enough.     

Pareto-superior trade policy

Current literature shows the welfare superiority of ad valorem over specific tariffs or domestic governments facing foreign monopolists. This note establishes the stronger result that, for any given specific tariff imposed on a foreign monopoly, there exists an ad valorem tariff that Pareto dominates it - that produces larger profit for the foreign firm as well as larger tariff revenue and consumer surplus for the domestic economy. This Pareto ranking can be extended to the case of foreign Cournot oligopoly under certain market conditions.     

A reappraisal of strategic trade policies with the endogenous mode of competition under vertical structures

This paper examines the endogenous choice of competition mode with strategic export policies in vertically related markets when each upstream firm located in each country determines the terms of the two-part tariff contract by maximizing generalized Nash bargaining. We show that (i) choosing Cournot (Bertrand) competition is the dominant strategy for both downstream firms when goods are substitutes (complements), which leads Pareto superior regardless of the nature of goods under the optimal trade policies; (ii) irrespective of rival’s competition mode, the optimal trade policy is an export subsidy under Cournot competition and an export tax under Bertrand competition; and (iii) trade liberalization may give rise to changes of competition mode and increase of social welfare.     

Horizontal Agreements and R&D Complementarities: Merger versus RJV

We study the decision of two firms within an oligopoly concerning whether to enter into a horizontal agreement to exploit complementarities between their R&D activities and if so, whether to merge or form a research joint venture (RJV). In contrast to horizontal merger and motivated by real-world evidence, we incorporate a probability that an RJV contract will fail to enforce R&D sharing. We find that a horizontal agreement always arises in equilibrium, which is consistent with empirical findings that R&D complementarities between firms positively influence the formation of horizontal agreements. The insiders’ merger/RJV choice involves a trade-off: While merger offers certainty that R&D complementarities will be exploited, it leads to a profit-reducing reaction by outsiders on the product market, where competition is Cournot. Greater contract enforceability (quality) and R&D investment costs both favour RJV. Interestingly, the insiders may choose to merge even when RJV contracts are always enforceable, and they may opt to form an RJV even when the likelihood of enforceability is negligible. We also explore the welfare implications of the firms’ merger/RJV choice.     

Competition in the Canadian Personal Finance Sector

This paper employs cross-section continuous time series data to examine competition in the Canadian personal finance sector for the period 1987–90. Using a generalised linear pricing model, firm entry is found to be significant in the setting of deposit and mortgage rates, suggesting the presence an incontestable market structure consistent with Cournot oligopoly. There is also evidence of price-making behaviour and relative bargainlripoff products. For three of the four products studied, a ‘fifth column’ consisting of the 12 major banks and trust companies best explain pricing in these markets     

技术创新、产业链与社会福利

文章运用一个上下游模型,其中两个成本不同的下游企业从同一个上游企业那里购买原材料,并在产品市场上进行产量竞争,低效率的企业从事降低成本的研发活动,研究表明：生产效率低的企业支付的中间品价格较低;更为重要的是,如果原来两企业的效率差距较小,技术创新会提高社会福利;但是,如果原来两企业的效率差距很大,技术创新则会损害社会福利。文章旨在分析技术创新的福利影响,为政府制定研发政策提供一定的参考。     

Should Variable Cost Aid to Attract Foreign Direct Investment be Banned? A European Perspective

The purpose of this paper is to analyze the European Commission’s approach to state aid to attract foreign direct investment (FDI) in a competition policy framework. The Commission considers variable cost aid (VCA) to be more distortive than start-up or fixed cost aid (FCA). This paper addresses that issue and checks whether allowing FCA while banning VCA is an optimal strategy for a supranational Competition Authority maximizing welfare. The model shows that a domestic government maximizing welfare always prefers VCA to FCA if both the incumbent and the entrant are foreign firms and if granting VCA does not cause the incumbent firm to exit the market. The model shows that banning VCA may lead to sub-optimal equilibria where welfare is not maximized.     

Free samples, profits, and welfare: The effect of market structures and behavioral modes

This paper addresses an important and underresearched issue in the economics and marketing literatures: what are the managerial and social consequences when firms use business models that are based on the dissemination of free samples? We develop an analytical model of free samples for both digital and physical goods that addresses three fundamental managerial and social questions. First, what is the effect of different market structures (i.e., monopoly and oligopoly) and cost structures on optimal marketing policy and prices? Second, what is the effect of different behavioral modes on prices and free samples? Third, how do different market structures and behavioral modes affect social welfare?The main conclusion is that a number of standard results do not hold when firms have the option of selling products and of distributing free samples. For example, the optimal strategy for oligopolists who produce homogeneous goods and coordinate their marketing policies is to increase - not decrease - the quantity of sold output. Similarly, under well-defined cost and demand conditions, monopoly can lead to a socially inferior outcome to competition. From a policy viewpoint, the managerial and social welfare implications of free samples depend on the type of market structure (monopoly or oligopoly) and the behavioral modes chosen by the firms in an industry (e.g., whether to coordinate their free sample policies or to behave non-cooperatively).     

Deregulating and privatizing statutory monopolies

Considering an homogeneous goods Cournot framework with cost asymmetries between the regulated incumbent and the unregulated entrant, this paper investigates the welfare effects of market liberalization and privatization. The positive efficiency effects of market liberalization depends on reallocation of the production between firms and on the extent of the “output distortion” due to the existence of imperfect information. More competition in a previously statutory monopoly reduces the cost of imperfect information. In terms of social welfare, we derive conditions on the desirability of entry and show that privatization is complementary to deregulation, i.e. privatization makes entry more desirable.     

Marketing compatible, yet differentiated, products : In search of competitive equilibria when network externalities are at work

Many goods are characterized by the fact that their utility increases with the number of consumers who buy them. It is the case for computers or communication networks, for example. Such goods are said to be subject to network externalities. We study those externalities in the context of a product differentiation model where product characteristics (or the image of the firm) are taken into account.We consider a market where two firms sell differentiated products and we study an equilibrium where the firms are competing in quantities (Cournot model) as well as in quality (two-stage game). We show how the degree of differentiation between the firms (or their products) and the compatibility decision are affected by the externality effect.     

Cournot and Bertrand Competition when Advertising Rotates Demand: The Case of Honda and Scion

We develop a model to explain why firm behavior differs in the market for small cars. Firms such as Honda compete in output (Cournot) and produce marketing campaigns with universal appeal, while firms such as Scion compete in price (Bertrand) and produce targeted marketing campaigns. We show that this mixture of Cournot and Bertrand behavior can occur when advertising rotates demand. When behaving as a Cournot-type firm such as Honda, it is more profitable to pursue a mass-market advertising campaign that rotates demand counterclockwise when it faces relatively low unit costs and a flat demand function. When behaving as a Bertrand-type firm such as Scion, it pays to pursue a niche-market advertising campaign that rotates demand clockwise when it faces relatively high unit costs and a steep demand.