Minimum Quality Standards under Asymmetric Duopoly with Endogenous Quality Ordering: A Note

In this note, we revisit minimum quality standards (MQS) under a vertically differentiated duopoly. We generalize the model in Ronnen (1991) and Valletti (2000) by introducing asymmetry into the fixed cost of quality improvement and by explicitly taking into account the endogeneity of quality ordering. In the generalized model, we show that the results derived by Ronnen (1991) and Valletti (2000) are largely robust.     

A Note on the Endogenous Timing of Tariff Policy in the Presence of a Time Lag between Production and Trade Decisions

Using the Hamilton–Slutsky extended endogenous timing game of observable delay framework, we analyze the endogenous timing of tariff policy in the presence of a time lag between production and trade decisions. In particular, focusing on the strategic relationships between an importing country’s government and an exporting monopoly firm, we show that a natural Stackelberg situation exists in which the importing country’s government as first mover determines the tariff rate and the exporting monopoly firm as second mover determines the production level. We also find that the natural Stackelberg equilibrium is Pareto superior to both the Nash and alternative Stackelberg equilibria. This implies that commitment to an ex ante optimal tariff policy before the production decision is made is optimal for the affected parties.     

A Note on Quality Choice,Monopoly, and Network Externality

Introducing network externalities into a model of vertically differentiated products, Lambertini and Orsini (2001, 2003) analyze the implications of a monopolist’s quality choice for social optimum. Moreover, they examine how the network externality affects quality, quantity, price, and social surplus. In this note, by looking at the nature of cost functions and the degree of network externalities, we reconsider their results, at least some of which depend upon the specificity of the cost functions.      

Strategic Investment Subsidies under Asymmetric Oligopoly

This paper examines strategic investment subsidies in an international oligopoly. A general oligopoly model is constructed in which firms compete in two stages and governments commit to investment subsidies prior to firms' actions. The paper considers asymmetry among firms that arises from the nature of goods they produce rather than their cost structures. When firms produce asymmetrically differentiated goods, it is found that a change in the number of foreign competitors may alter the sign of the optimal unilateral investment subsidy. An example of policy reversal is provided in the case of strategic research and development subsidies for a quality‐differentiated industry.     

A Note on Strategic Trade Policy and Endogenous Quality Choice*

This paper shows that some of the main policy implications in Park (2001 ) and Zhou, Spencer, and Vertinsky (2002 ) are sensitive to their assumptions on marginal production costs. The unilaterally optimal policy for investment towards quality improvement is analyzed, assuming constant and non‐negative marginal production costs under vertically differentiated international duopoly. If marginal production costs are different across firms, the optimal policy for each exporting country may be opposite in its sign from that shown by the existing papers under Bertrand competition. The policy reversal may also occur for the low‐quality exporting country under Cournot competition.     

Strategic Compatibility Choice,Network Alliance,and Welfare

Based on a simple model of compatibility choice under differentiated Cournot duopoly with network externalities, we consider how the levels of a network externality and product substitutability affect the choice of compatibility. In particular, if the level of network externality is larger than that of product substitutability, there are multiple equilibria involving imperfect and perfect compatibility. Furthermore, we demonstrate the conditions for constructing such a network alliance so that firms provide perfectly compatible products. The network alliance is stable and socially optimal.     

NOTE ON THE WELFARE EFFECT OF SECOND‐BEST POLICIES IN A NETWORK INDUSTRY: A MONOPOLY CASE

We show that the welfare effect of second‐best policies such as a subsidy/tax and quality regulation in the case of a monopoly in a network industry depends on the strength of network effects. That is, focusing on the case in which the network effect is smaller (larger) than the marginal cost of production for the small (large) network effect, it is demonstrated that in the case of a small (large) network effect, an output and a quality‐improving subsidy (tax) policy are socially optimal, and a government should commit to a minimum (maximum) quality standard.     

The optimal choice of internal decision‐making structures in a network industry: A multiproduct monopoly case

Focusing on the role of network compatibility effects between products of a multiproduct monopoly and on the form of consumer expectation for network sizes, we consider the optimal choice of internal decision‐making structures, that is, centralization and decentralization, and its welfare effect in a network industry. We demonstrate that if the degree of network compatibility effects is sufficiently large, the decentralized decision making is socially optimal. However, in the case of consumer ex post expectations, it is optimal for the firm's owners to choose the centralized decision making. We apply the model to the cases of price‐setting games, complementary products, and negative network externalities to examine the optimal choice of internal decision‐making structures.     

The Role of GATT/WTO as a Commitment Device in the Presence of a Time Lag: Free Trade,Time‐consistent Tariff Policy and Market Size

We consider whether a free trade policy is superior to tariff policies in the presence of a time lag between production and trade decisions. We show that the preferable choice between a free trade policy and a time‐consistent tariff policy depends on the market size of the importing country. However, because a free trade policy itself is not necessarily credible in the presence of a time lag, the importing country requires an international organisation such as GATT/WTO as a commitment device. Accordingly, employing a non‐cooperative game approach, we analyse under what conditions becoming a member of such an international organisation is a subgame perfect Nash equilibrium and show that free trade under the GATT/WTO regime is Pareto improving for the importing and exporting countries.     

On the paradoxical case of a consumer-based environmental subsidy policy

We apply an environmentally differentiated duopoly model to the analysis of environmental policy involving consumer subsidies based on the emission levels of the products consumers purchase. More specifically, we consider the environmental and welfare effects of subsidizing consumers who purchase environmentally friendly goods in the case of a partially covered market with a Cournot duopoly. We show that, paradoxically, the subsidy policy degrades the environment, and that the optimal policy depends on the degree of marginal social valuation of environmental damage. That is, if the marginal social valuation of environmental damage is larger than a certain value, a consumer-based environmental subsidy policy is not socially optimal.