Quality and Quantity Competition in a Multiproduct Duopoly

This article proposes a Cournot model of two‐stage competition to examine the patterns of vertical product differentiation in a multiproduct duopoly. Firms simultaneously choose the number of products and their qualities at the first stage and compete in quantities at the second stage. We show that when the fixed setup cost of a product is high enough to result in a monopoly outcome, the monopolist always sells a single product. Moreover, in any equilibrium of a multiproduct duopoly, quality differentiation between them will develop into a nonsegmented pattern because each firm desires to avoid a strong effect of cannibalization. The set of equilibria reveals the properties of quality differentiation between multiproduct firms. In a multiproduct duopoly, the profit from a high‐quality product can be lower than that from a low‐quality product. This finding sharply contrasts with the literature on single‐product firms, which finds the high‐quality advantage.     

Price‐Match Announcements in a Consumer Search Duopoly

Using a model of sequential search, we show that announcements to price‐match raise prices by altering consumer search behavior. First, price‐matching diminishes firms’ incentives to lower prices to attract consumers who have no search costs. Second, for consumers with positive search costs, price‐matching lowers the marginal benefit of search, inducing them to accept higher prices. Finally, price‐matching can lead to asymmetric equilibria where one firm runs fewer sales and both firms tend to offer smaller discounts than in a symmetric equilibrium. Price increases grow in the proportion of consumers who invoke price‐matching guarantees and in the level of equilibrium asymmetry.     

Contests for Ranks: Experimental Evidence

We use experiments to analyze multiple dimensions of the relationship between rank incentives and individual performance. In our experiment (i) rank is defined as subjects' relative position in their group based on their performance in a real effort task and (ii) subjects' earnings are independent of their performance. We find that any rank incentive improves mean performance than no rank incentive, and this result is independent of the group size. In the large group, the mean performance increases strictly in all except at the highest rank incentive, but in the small group the mean performance increases weakly in rank incentives. Finally, the mean performance is significantly higher in the large than in the small group because of a higher “prestige effect.” In additional treatments in which we do not reveal the identity of the status‐prize winners, we find that average performance is identical to that in the baseline treatment without any status prizes. The last result signifies the important role that public revelation plays to enhance the strength of status. The results are important for managerial practices.     

A Psychological Reexamination of the Bertrand Paradox

The Bertrand paradox describes a situation in which two competing firms reach an outcome where both price at marginal cost. In laboratory experiments, this equilibrium is not generally observed. Existing empirical works on Bertrand competition have found evidence for boundedly rational models. We find that such models are useful in organizing behavior in early stages of the game, but less so in later stages. We show that a new model, coarse grid Nash equilibrium, based on the assumption that subjects discretize the strategy space, explains the data better.     

Communication and Cooperation: A Methodological Study

We study the effect of communication in an experimental game where cooperation is consistent with equilibrium play. We examine two methodological questions which affect many studies of communication in games, particularly those studying the relationship between communication and cooperation in supergames. We show that making it easier for subjects to reach an agreement (by allowing more rounds of communication) does not increase cooperation with a limited message space treatment. Thus, limited message space treatments are not a good substitute for the use of chat. Making the game longer, thereby making the connection between the first period and the continuation game more obvious, also has little impact on cooperation. For both the two‐ and three‐period versions of our game we find substantial amounts of contingent play. This implies that use of a finitely repeated game, which has a number of methodological advantages, maintains the main properties of the underlying supergame.     

Tacit Collusion in Price‐Setting Oligopoly: A Puzzle Redux

We study tacit collusion in price‐setting duopoly games with strategic complements and substitutes. While this problem has been considered by several studies, this article sheds new light on the comparison by focusing on the relationship between dynamic stability of equilibrium and tacit collusion. We find when controlling for the absolute slope of the reaction functions, there are no robust differences in either the convergence properties or tacit collusion between complements and substitutes treatments.     

Market Interaction and Pro-Social Behavior: An Experimental Study

When actions generate negative externalities for third parties, incentives exist to pass these “morally costly” decisions to others. In laboratory experiments, we investigate how market interaction affects allocations when the right to divide a sum of money between oneself and a passive recipient is commoditized. Allocation to recipients is reduced by more than half when determined by subjects who purchase or keep the right to make the division as compared to a control where subjects are directly assigned the right. Sellers report accurate beliefs about recipient allocations and do not report feeling less responsible the more often they sell the allocation right. The market allocates the right to make divisions more frequently to buyers who allocate more to recipients, but sellers who allocate less to recipients tend to sell less often. Selection cannot solely explain the results, suggesting market interaction itself may directly impact behavior.     

How the Nature of Product Differentiation Affects Procurement Competition

This article uses computational methods that reveal substantive differences among the equilibrium outcomes from three models of procurement competition: a recently developed model requiring numerical solution and two analytically tractable models that might naturally be considered suitable proxies. The models differ in what sellers know about the buyer's preferences for their products, and they yield substantially different prices and payoffs, different implications for institutional choice, surprising intensities of competition, and qualitatively different comparative statics. These findings caution against using the analytically convenient models when the newer model is empirically appropriate. Reinterpreting the models and results also provides new insights regarding price discrimination in oligopoly.     

HIGH AND VOLATILE TREASURY YIELDS IN TANZANIA: THE ROLE OF STRATEGIC BIDDING AND AUCTION MICROSTRUCTURE

The observed increase in the level and volatility of Tanzania's Treasury yields in recent years against an otherwise benign macroeconomic backdrop presented a puzzle for policymakers, while raising concerns about the fiscal burden of rising debt interest payments and diversion of bank credit away from the private sector. Using evidence from bid-level data, and supported by a simple theorising of bidder incentives under unorthodox issuance practices, this paper traces the recent volatility in yields to the emergence of a sharp segmentation of the T-bill market between sophisticated financial market players (foreign-controlled banks) and a less-experienced group of investors (domestic pension funds and small banks). An important policy recommendation that emerges is that public debt managers should avoid micro-managing Treasury bill auctions by issuing amounts in excess of those offered or by dipping into oversubscribed segments of the yield curve, as such practices seriously disadvantage the less-sophisticated (but more competitive) investors vis-à-vis the more sophisticated players.     

The Effect of Whistle-Blowing Incentives on Collusion: An Experimental Study of Leniency Programs

Policymakers are increasingly using whistle-blowing incentives aimed at curtailing illegal or unethical behavior. We theoretically and experimentally investigate one version of whistle-blowing incentive: leniency programs aimed at curbing anticompetitive activities by firms, by reducing the punishment faced by a cartel member who reports the cartel's behavior. The theoretical model captures the two important effects of whistle-blowing incentives: the direct effect, a reduction in the stability of cartels, and the counterproductive indirect effect, an increase in the incentives to form cartels in the first place by lowering the cost of exiting them. As these point in opposite directions, the net theoretical effect is indeterminate. Our laboratory experiment compares two leniency programs—full immunity from fines and partial immunity—against a baseline with no whistle-blowing incentives in place. We find evidence of the direct effect but not the indirect effect, and thus both programs reduce the extent of price fixing and the damage associated with it.     

Determinants of Tacit Collusion in a Cournot Duopoly Experiment

We contribute to a growing literature that examines the relationship between the nature of strategic interaction and collusive behavior. We present results from a repeated Cournot duopoly experiment with treatments in which quantity choices are either strategic complements or substitutes. The initial underlying demand function allows for direct comparison with previous work utilizing a Bertrand duopoly setting. We find some evidence of collusion in the substitutes treatment, but no collusion in the complements treatment. We study an additional substitutes treatment to control for the absolute slope of the reaction functions across treatments, where we again find evidence of collusive behavior. However, using an alternate demand function parameterization where the goods are less closely related, we find no evidence of collusive behavior in either the substitutes or the complements treatment.     

Effects of a Management–Labor Context and Team Play on Ultimatum Game Outcomes

Laboratory experiments are usually done on individuals, but many business decisions involve groups. Therefore, we ran ultimatum games using individuals and two‐person teams. We primed business roles with the labels “labor” and “management,” or we used the generic labels of “proposer” and “responder.” With business labels, individuals offered lower shares at higher stakes with no significant differences in acceptance rates. For teams, business labels had no significant effect on shares offered, with significantly lower acceptance rates at higher stakes. Teams offered less than individuals, along with higher acceptance rates with generic labels, compared to no significant differences with business labels.     

Effort and Performance: What Distinguishes Interacting and Noninteracting Groups from Individuals?

We study how group membership affects behavior both when group members can and cannot interact with each other. Our goal is to isolate the contrasting forces that spring from group membership: a free‐riding incentive leading to reduced effort and a sense of social responsibility that increases effort. In an environment with varying task difficulty and individual decision making as the benchmark, we show that the free‐riding effect is stronger. Group members significantly reduce their effort in situations where they share the outcome but are unable to communicate. When group members share outcomes and can interact, they outperform groups without communication and individuals. We show that these groups do as well as the best constituent member would have done on his or her own.     

Product and country substitution in imports: An empirical comparison of theoretical concepts

Product and Country Substitution in Imports: An Empirical Comparison of Theoretical Concepts. — The paper focuses on the shortcomings of current unit-values based measures for estimating product and country substitution in imports. The results of the bilateral index number technique in measuring changes in the country composition or product mix of imports were found to be inadequate, which was shown in an analysis of data on the French import market for chairs. An improved technique is briefly summarized, and its applicability compared with the bilateral index number technique. The new method performed accurately and provided a reliable basis for a refined analysis of changes within import markets.     

Endogenous Efficiency Gains from Mergers

This article analyzes endogenous efficiency gains from mergers. It considers oligopolistic homogeneous good markets and duopolistic and triopolistic markets under product differentiation (PD) (quantity and price competition). In a two‐stage game, firms invest in cost‐reducing innovation (with and without mergers) and then compete in output/prices. It is found that in homogeneous good markets, all possible mergers generate efficiency gains, and that these are most significant when R&D spillovers are very low or very high. Efficiency gains increase with the number of insiders and generally decrease with the number of outsiders. With PD, in most cases, the merger generates efficiency gains when spillovers and/or PD are sufficiently high. With PD, efficiency gains increase with spillovers, but may increase or decrease with the level of PD. The implications of the results for the relationship between competition and innovation outputs and for merger policy are discussed.     

Sales and Firm Entry: The Case of Wal‐Mart

Temporary price reductions or “sales” have become increasingly important in the evolution of the price level. We present a model of repeated price competition to illustrate how entry causes incumbents to alternate between high and low prices. Using a six‐year panel of weekly observations from a grocery chain, we find that individual stores employ more sales as the distance to Wal‐Mart falls. Moreover, the increase in the frequency of sales was concentrated on the most popular products, suggesting the use of a loss‐leader strategy.     

Water Externalities: Tragedy of the Common Canal

Laboratory experiments are used to investigate alternative solutions to the allocation problem of a common‐pool resource with unidirectional flow. Focus is on the comparative economic efficiency of nonbinding communications, bilateral “Coasian” bargaining, allocation by auction, and allocation by exogenous usage fee. All solutions improve allocative efficiency, but communication and bilateral bargaining are not generally as effective as market allocations. An exogenously imposed optimal fee results in the greatest allocative efficiency, closely followed by an auction allocation that determines the usage fee endogenously.