A Modelof Competitive Limit Pricing

This paper offers a new theory of limit pricing. Incumbents from different markets or regions "compete" against one another, with each attempting to price in a manner that deflects entry into the others' markets. An entrant is imperfectly informed as to the incumbents' respective investments in cost reduction and seeks to enter markets in which incumbents have high costs. In a focal equilibrium, the entrant uses a simple "comparison strategy," in which it enters only the highest-priced markets, and incumbents engage in limit-pricing behavior. The influence on pricing of the number of markets and the scope of entry is also reported. Throughout, the central feature of the analysis is that an incumbent's price affects its investment incentives, with lower prices being complementary to greater investment.     

Advertising as Information: Matching Products to Buyers

We consider communication of quality via cheap talk and dissipative advertising expenditures, when consumers have heterogeneous tastes for quality, and price information must be acquired through costly search. For search pods, cheap talk communicates quality when fixed costs are roughly constant across quality levels, while if fixed costs vary greatly with quality, then firms having the higher fixed-cost quality level use dissipative advertising. For experience goods, quality can be communicated by cheap talk in a range where low-quality firms have greater fixed costs, and low-quality firms use dissipative advertising if their fixed costs are greater still.     

Multilateral trade negotiations, bilateral opportunism and the rules of GATT/WTO

Trade negotiations occur through time and between the governments of many countries. An important issue is thus whether the value of concessions that a government wins in a current negotiation may be eroded in a future bilateral negotiation to which it is not party. We identify rules of negotiation that serve to protect the welfare of governments that are not participating in the bilateral negotiation. Our main finding is that the two central principles of GATT/WTO—nondiscrimination (MFN) and reciprocity—preserve the welfare of nonparticipating governments and therefore offer a “first-line of defense” against bilateral opportunism.     

Auctioning countermeasures in the WTO

We offer a first formal analysis of auctioning retaliation rights within the WTO. We show that the auctions exhibit externalities among bidders, and we characterize equilibrium bidder behavior under alternative auction formats. If the violating country is prevented from bidding to retire the right of retaliation against it, then the possibility of “auction failure” arises, whereby no bids are made despite positive valuation by bidders. If the violating country is instead permitted to bid, then auction failure is precluded, and indeed the right of retaliation is always retired. We evaluate these different auction formats from normative (revenue, compliance, efficiency) standpoints.     

PROFIT SHIFTING AND TRADE AGREEMENTS IN IMPERFECTLY COMPETITIVE MARKETS*

Do new rationales for trade agreements arise once imperfectly competitive markets are allowed? We consider several trade models that feature imperfectly competitive markets and argue that the basic rationale for a trade agreement is, in fact, the same rationale that arises in perfectly competitive markets. In all of the models that we consider, and whether or not governments have political–economic objectives, the only rationale for a trade agreement is to remedy the inefficient terms‐of‐trade‐driven restrictions in trade volume. We also show that the principles of reciprocity and nondiscrimination continue to be efficiency enhancing in these settings.     

Signalling and entry deterrence: a multidimensional analysis

I consider whether a privately informed incumbent can use limit pricing and upward distortions in advertising to deter profitable entry. Profitable entry is not deterred when the incumbent is privately informed only about its cost type. Profitable entry may be deterred, however, if the incumbent is privately informed about its cost type and its patience level. An equilibrium foundation is thus provided for the traditional hypothesis that limit pricing and aggressive advertising by an incumbent may deter profitable entry. At a methodological level, the article contributes by characterizing the refined equilibria of a signalling model with multiple dimensions of private information and multiple signals.     

Strategic export subsidies and reciprocal trade agreements: The natural monopoly case

Why do governments seek restrictions on the use of export subsidies through reciprocal trade agreements such as GATT? In this paper, we emphasize that subsidy competition between governments can serve to coordinate the entry decisions of firms, finding that consumers in the importing countries may suffer if the coordination afforded exporters by government subsidy programs does more to prevent entry than to promote it. In such circumstances, we show that the existence of export subsidy programs can lead to inefficiencies, and importing countries and the world as a whole can be better off when such programs are banned.     

Collusion and Price Rigidity

We consider an infinitely repeated Bertrand game, in which prices are publicly observed and each firm receives a privately observed, i.i.d. cost shock in each period. We focus on symmetric perfect public equilibria, wherein any "punishments" are borne equally by all firms. We identify a tradeoff that is associated with collusive pricing schemes in which the price to be charged by each firm is strictly increasing in its cost level: such "fully sorting" schemes offer efficiency benefits, as they ensure that the lowest-cost firm makes the current sale, but they also imply an informational cost (distorted pricing and/or equilibrium-path price wars), since a higher-cost firm must be deterred from mimicking a lower-cost firm by charging a lower price. A rigid-pricing scheme, where a firm's collusive price is independent of its current cost position, sacrifices efficiency benefits but also diminishes the informational cost. For a wide range of settings, the optimal symmetric collusive scheme requires (i) the absence of equilibrium-path price wars and (ii) a rigid price. If firms are sufficiently impatient, however, the rigid-pricing scheme cannot be enforced, and the collusive price of lower-cost firms may be distorted downward in order to diminish the incentive to cheat. When the model is modified to include i.i.d. public demand shocks, the downward pricing distortion that accompanies a firm's lower-cost realization may occur only when current demand is high.