内部货币与我国最优关税政策研究

本文将内部货币引入一个包含两国两商品的纯交换经济,在考虑贸易关税的情形下,将此拓展成一个Nash关税博弈模型。我们用2005年中国与世界其他国家(ROW)的产出和双边贸易数据对该贸易模型进行数值分析,考察一般经济均衡条件下内部货币的引入对我国与ROW最优关税政策的影响。研究表明:(1)内部货币对贸易双方关税博弈的Nash均衡有显著影响,即相对于无内部货币的情形,内部货币的存在将削弱我国在关税博弈中的关税报复力量。(2)中国在2005年的实际关税接近于不考虑ROW关税报复时的最优关税水平及Nash均衡关税,而ROW当时的实际关税却远低于其最优关税和Nash均衡关税水平,这说明我国在2005年所采取的关税政策合乎本国利益。     

Tariffs,Quotas, and Forward Contracts under Asymmetric Information*

We consider optimal trade policy for a large country with private information. We show that the optimal tariff leads to a signaling equilibrium with higher tariffs and lower welfare than under complete information, whereas the optimal import quota replicates the complete information equilibrium and thus is superior to the tariff. We also show that, with the tariff, the country may be better off being uninformed. Finally, we show that if the importing nation cannot commit to its tariff, the use of futures contracts together with the dynamically consistent tariff leads to the same equilibrium as under complete information with commitment.     

Asymmetric Tax Policy Responses in Large Economies With Cross-Border Pollution

We build a model of cross-border pollution between two large open economies, one importing the polluting good and the other exporting it, and derive their non-cooperative trade and environmental tax policies. We show among other things, that (1) in response to a bilateral reduction in trade taxes by both countries, the former country’s optimal policy is to lower its Nash emissions tax while the latter’s is to raise it, and (2) in response to an increase in emissions tax rates by both countries, the former country’s optimal reaction is to raise its Nash import tariff, while the latter’s is to reduce its Nash export tax. That is, in the present context, freer trade leads the exporting country to adopt stricter while the importing country laxer environmental tax policies.     

Mergers and Trade Policy under Oligopoly

For an oligopolistic industry, the effects of mergers on the domestic country's optimal trade policy are analyzed. If the domestic country pursues an optimal trade policy then it will always lose as a result of a foreign merger. The optimal domestic response to a foreign merger is to decrease (increase) the tariff if demand is concave (convex) and to increase the production subsidy. The foreign merger reduces foreign welfare when the domestic country pursues its optimal trade policy. The optimal domestic response to a domestic merger is to leave the tariff unchanged and to increase the production subsidy.     

Foreign Factor Ownership and Optimal Tariffs

In the presence of foreign factor ownership tariffs change not only the terms of (goods) trade but also income flows between countries. Assume that only the home country owns factors abroad. Then the optimal tariff is negative if and only if foreign factor ownership entails trade-pattern reversals. Trade-pattern reversals are neither a necessary nor a sufficient condition for a negative optimal tariff if the foreign country owns factors in the home country. Changes in the home country's tariff shift the foreign country's offer curve. This adds a new dimension to optimal tariff analysis.     

Cournot competition,intra-industry trade,and nonconstancy of marginal costs: A three-country case

In this paper we shall develop and investigate a three-country and two-commodity model of international trade with an imperfectly competitive good which is produced under increasing marginal costs by explicitly incorporating intra-industry trade between industrialized countries. The main results we obtain are: (1) the full optimal discriminatory tariffs levied by a third importing country are necessarily positive; (2) the imposition of tariff can cause an increase in intra-industry trade, and therefore (3) under certain conditions the importing country's intervention into the international market can be a Pareto superior policy for the world as a whole as well as for the country.     

Effects of Multilateral Trade Liberalization on Prices*

To analyze the effects of simultaneous tariff reductions by multiple importing countries on prices, we construct a simple three‐country model where a good is produced by a monopolist with nonconstant marginal cost and imported by two countries. We compare two representative tariff‐reduction formulas: the “fixed‐amount” and the “uniform percentage” reductions. The uniform percentage reductions may increase the consumer price in the importing country, whose initial tariff is lower. Thus, importing countries with relatively low tariffs may prefer a bilateral trade agreement to a multilateral one to ensure consumer gains.     

A Two‐Country Game of Competition Policies

Recently a number of studies have recognized that trade policy can be substituted for by competition policy. This study demonstrates, however, that there is a fundamental difference in the working of terms‐of‐trade effects between competition policy and tariff policy and that if countries optimally set their respective competition policies, it is unlikely to result in a tariff‐war‐like state in which all countries adopt distortionary policies. Instead, in a Nash equilibrium, one country maintains perfect competition in its domestic service sector while the other country tolerates imperfect competition.     

Trade,Transboundary Pollution,and Foreign Lobbying

In this paper, we explore the use of trade policy in addressing transboundary stock pollution problems such as acid rain and water pollution. We show that a tariff determined by the current level of accumulated pollution can induce the time path of emissions optimal for the downstream (polluted) country. But if the upstream (polluting) country can lobby the downstream government to impose lower tariffs, distortions brought by corruption and foreign lobbying lead to a rise in the upstream country’s social welfare, and to a decrease in social welfare in the downstream country. Thus, the usefulness of trade policy as a tool for encouraging cooperation and internalizing transboundary externalities depends critically on the degree of governments’ susceptibility to foreign political influence.     

Endogenous Choice of Trade Instrument Under Uncertainty *

This Paper endogenizes the choice between import tariffs and quotas of two policy active countries in a duopsonistic world market. Without uncertainty, import quotas are welfare superior to import tariffs in equilibrium. If two importers can precommit to a type of instrument before deciding the level of the instrument to use in a future period, an import quota equilibrium emerges. We introduce asymmetric risk in the import demand schedule of the two importers. There exists a range of parameters in which a mixed equilibrium emerges, i.e. one country uses a tariff while the other restricts trade with an import quota. The likelihood that both importers choose a different trade instrument in equilibrium is increasing with the correlation coefficient of the two random shocks. [F13]     

Does free trade promote environmental technology transfer?

We investigate how environmental and trade policies affect the transfer of environmental technology in a two-country model with global pollution. By comparing free trade and tariff policy with or without commitment, the following results are obtained. First, firms avoid the implementation of environmental tax by contracting technological transfer. Second, there is a case in which free trade is preferable to a tariff policy for both countries when there is no commitment to a tariff level. Third, free trade is not Pareto-preferred to a tariff policy when there is a commitment.     

Tariffs and privatization policy in a bilateral trade with corporate social responsibility

Corporate social responsibility (CSR) has become a global business strategy and thus it provides significant welfare implications for designing optimal policies. This paper investigates the impact of CSR on policy interaction between tariffs and privatization in an international bilateral trade model. We find that CSR is closely related to the government's policy decisions on tariffs. In particular, we find that the strategic tariff for increasing domestic welfare is always higher (lower) than the efficient tariff for improving global welfare when the degree of CSR is low (high). We also show that a privatization policy raises tariff and worsens (improves) domestic welfare when the degree of CSR is low (high). Finally, we demonstrate that both countries choose a nationalization policy even though the privatization policy is globally optimal when the degree of CSR is high.     

SPILLOVER EFFECTS OF ECONOMIC INTEGRATION IN A THREE‐COUNTRY MODEL*

Using a simple monopoly model, we examine the effects of economic integration. We show that the number of markets and the shapes of marginal revenue curves, are crucial in evaluating economic integration when the marginal cost is not constant. The effects of tariff reductions in a three‐country model contrast with those found in a two‐country model. Effects also depend on which trade policy the non‐member country adopts. When both importing countries simultaneously lower their tariffs, the Metzler paradox may arise.     

Flexible and welfare-consistent tariff aggregation over exporter regions

In this paper we improve on existing tariff aggregation techniques in applied equilibrium models (AEM) with the aim of correcting for two sources of bias in simulated welfare results: (1) aggregation over exporter regions with significant tariff dispersion and (2) variable tariff rates determined by Tariff Rate Quota (TRQ) regimes. Both aspects seem important due to an increasing number of bilateral FTAs which drive up tariff divergence across countries and tend to apply TRQs, at least temporarily. We demonstrate that the proposed aggregation technique can handle both tariff and non-tariff barriers to trade by combining a number of tariff indexes in a modified trade balance condition in a welfare-consistent manner. Additionally, different rent-allocation shares for TRQs can be easily introduced in our methodological extension. We also address the implications of some rather strict behavioral assumptions with regard to demand that welfare consistent aggregation requires. An empirical analysis of the Korean dairy market in the EU–South Korea FTA using the proposed method shows that simulated welfare gains are largely affected by the tariff aggregation technique over regions and trade policy instruments. Based on this finding we recommend the more widespread application of welfare consistent tariff aggregation in applied modeling and further research on that topic.     

Redistribution,state trading enterprises and ‘politically optimal’ tariffs

State trading enterprises (STEs) are widely used and can be viewed as instruments of trade policy. We analyse two aspects: the first is their potential trade distorting effect; the second is how they modify the case for the ‘politically optimal’ tariff. We show that the STE can reduce the need for a tariff designed for domestic redistribution. This result introduces some ambiguity about how STEs are interpreted: from a multilateralist perspective, they should be dealt with in the same way as other non‐tariff barriers; from a nationalistic perspective, they can reduce the need for ‘politically optimal.’     

Dynamic Interactions in Trade Policy in a Differential Game Model of Tariff Protection

This paper develops a two‐country dynamic game model of tariff protection to reconsider optimal trade policies and their implications for welfare. The authors show that an import subsidy is optimal in the feedback Nash equilibria, which results in a curious possibility that the domestic market is monopolized by the foreign firrm. However, welfare comparisons among Nash equilibria, free trade, and autarky reveal that feedback Nash equilibria involve higher welfare than both autarky and free trade, i.e. dynamic noncooperative choices of policy serve as tacit policy coordination and ensure larger trade gains relative to free trade.     

DOMESTIC COMPETITION POLICY AND TARIFF POLICY COMPARED*

M. Yano and F. Dei have demonstrated that, by controlling the degree of competition in a non‐tradables market (competition policy), a country can influence the terms of trade so as to increase its welfare, relative to free trade. Using their model, this study compares the extent of this effect with that of a tariff policy. It demonstrates that a competition policy can achieve a higher utility than a tariff policy if tariff rates are at levels currently tolerated in the real world. This demonstrates that domestic competition policy may play an important role as a substitute for tariff policy.     

On the International Linkages between Trade and Merger Policies*

In a three‐country model, this paper investigates linkages between merger incentives of exporting firms and the trade policy of an importing country. When exporting firms come from only one country, the tariff response of the importing country reverses the welfare effects of a merger in the exporting country. If there exist two exporting countries, a merger creates two types of conflicting international externalities. First, a merger in one exporting country increases profits of all firms. Secondly, non‐merged firms lose if the importing country is free to raise its tariff in response to a merger of foreign exporters.     

Endogenous Restrictions for Least Developed Economies

The paper explores appropriate trade restrictions for least developed countries facing external terms-of-trade disturbances in terms of minimizing variations in the real sphere of the economy. Two alternative models are explored: export-subsidy versus import-tariff endogeneity. The theoretical model indicates that the tariff regime is a more appropriate policy. Empirical evidence from Sudan (1950– 1991) suggests that, although there is some discernable evidence that Sudan followed the tariff regime, the country did not apply the policy correctly, adjusting the tariff mainly in response to foreign import prices rather than foreign export prices, which are more unstable.     

WAGE SUBSIDY AND WELFARE IN DEVELOPING COUNTRIES

This paper seeks to answer if wage subsidy to workers displaced due to trade reform raises welfare in a developing country. We use a general equilibrium model with non‐specific factor inputs and trade liberalization as a policy variable. A combination of wage subsidy and tariff rate obtains the second‐best welfare level. The theoretical result is new, policy‐relevant and important in view of political‐economy aspects of free trade in developing and transition countries.