Commodity taxation and parallel imports

We examine the interaction between commodity taxes and parallel imports in a two-country model with imperfect competition. While governments determine non-cooperatively their commodity tax rate, the volume of parallel imports is determined endogenously by the retailing sector. We compare the positive and normative implications of having commodity taxes based on destination or origin principle. We show that, as the volume of parallel imports increases, non-cooperative origin taxes converge, while destination taxes diverge. Moreover, origin taxes are more similar and lead to higher aggregate welfare levels than destination taxes.     

Endogenous leadership and sustainability of enhanced cooperation in a repeated interactions model of tax competition: Endogenous leadership in tax competition

In this study, the endogenous timing of moves is analyzed in an infinitely repeated game setting of capital tax competition between a subgroup (a tax union) of countries agreeing on partial tax harmonization and outside countries. It is shown that in a subgame perfect equilibrium of the infinitely repeated tax competition game, they simultaneously set capital taxes in every stage game when a tax union comprises similar countries with respect to productivity, whereas they may set capital taxes sequentially in every stage game when a tax union comprises dissimilar countries. This finding is significantly different from Ogawa (2013), although we also assume that capital is owned by the country's residents, as in Ogawa's model. This is because a disadvantaged member country of the tax union would suffer from larger losses when a tax union comprising dissimilar countries, and thus the tax union will choose the strategy of moving Late for the sake of sustaining tax harmonization to avoid such losses.     

Coordinating Tariff Reduction and Domestic Tax Reform under Imperfect Competition*

A major constraint on trade liberalization in many countries is the prospective loss of government revenue. Recent results, however, have established a simple and appealing strategy for overcoming this difficulty, whilst still realizing the efficiency gains from liberalization, in small, competitive economies: combining tariff cuts with point‐for‐point increases in destination‐based consumption taxes unambiguously increases both national welfare and total government revenue. This note explores the implications of imperfect competition for this strategy. Examples are easily found in which this strategy unambiguously reduces domestic welfare.     

Royalty reform and illegal reporting of harvest volumes under alternative penalty schemes

We study royalty reform in a timber concessions framework. Illegal logging in the form of underreporting of harvesting is modeled. Harvesters can be either risk neutral or risk averse. Detection of illegal logging by the government is imperfect and costly. We focus on the government’s policy problem, solving first for socially optimal royalty and auditing levels, and then examining a revenue-neutral reform toward this benchmark. We find that higher royalty progression will always decrease actual harvest volume regardless of risk preferences for the harvester, but the effect of a reform on reported harvest volume is sensitive to the penalty scheme imposed by the government. If the fine is levied on evaded royalty payments, then higher royalty progression may increase reported harvest volume. But when the fine is levied on undeclared harvest volume, the reverse happens. Higher royalty regression increases actual harvest volume under both penalty schemes, but it may decrease reported harvest volume. Higher regression will increase undeclared harvest volume when the fine is levied on evaded royalty payments.      

Tax Principles and Tariff‐Tax Reforms under International Oligopoly

In a two‐country duopoly model, this paper compares destination‐ and origin‐based commodity taxes adjusted to tariff reductions so that the world price and foreign welfare remain unaltered. We first find that this tariff‐tax reform reduces domestic welfare under the destination principle while the opposite holds under the origin principle. Then, it is shown that this ranking is reversed if exports are taxed. In short, which is preferable between destination and origin taxes depends on the tax principle and which between imports and exports are taxed.     

Which border taxes? Origin and destination regimes with fiscal competition in output and emission taxes

This paper posits a two-stage game in tax regime and tax rates to study the property of second-best emission and output taxes in a two-country world with an atmospheric externality. It shows that (i) either the destination–destination or the origin–origin tax regime may constitute the subgame perfect Nash equilibrium of this game; (ii) either regime may Pareto-dominate the other; (iii) it is possible to have a prisoner's dilemma game where the origin–origin regime Pareto-dominates but the choice of the destination regime is the dominant strategy for each country. Other results include (iv) under origin–origin regime: the output tax is used for fiscal competition; the emission tax is set at a rate equal to the (national) marginal social damage of emissions; and public goods are provided suboptimally. (v) Under destination–destination regime: the output tax is ineffective as an instrument for fiscal competition; the emission tax is used not only for combating pollution but also for tax competition; the tax is set at a rate below the (national) marginal social damage of emissions; emissions are pushed above their closed-economy level; the provision of public goods are optimal.     

How should commodities be taxed?: Market structure,product heterogeneity and the optimal structure of commodity taxes

This paper is concerned with the form in which commodity taxes are best imposed, and particularly with the appropriate balance between specific and ad valorem components. This neglected issue is of policy importance in relation to the harmonization of tax structures within the EEC, and of theoretical interest as a point of contact between optimal tax theory and models of non-price competition. The roles of the two taxes as purely corrective devices under a variety of market forms are established and discussed. The analysis suggests that heavily taxed commodities should normally be subject to high specific rather than high ad valorem taxes.     

Revenue‐enhancing Trade Liberalization in a Differentiated Duopoly

Existing studies suggest that in developing countries, tax reforms that increase consumption taxes can compensate for shortfalls in revenue from a tariff reduction. However, these revenue‐enhancing tariff–tax reforms have a critical shortcoming—they generally reduce welfare under imperfect competition. This paper shows that tax reforms such as consumption tax reforms do not necessarily have to be implemented to make up for revenue shortfalls from tariff reductions under imperfect competition, because trade liberalization through tariff cuts leads to an increase in government revenue when domestic and imported goods have a high substitutability. This revenue‐enhancing effect of a tariff reduction occurs for a wider degree of product substitutability when initial tariff and consumption tax rates are high. More importantly, we show that even if initial tariff and consumption tax rates are sufficiently low, a tariff reduction still increases government revenue for a low degree of product differentiation under Bertrand competition.     

Optimal Taxation for Polluting Oligopolists with Endogenous Market Structure

This paper examines the optimal output taxes for polluting oligopolists under endogenous market structure, in the presence of external costs that vary exogenously with aggregate output. For general functional forms, we show that (i) the equilibrium number of firms in an industry may differ from the socially optimal number of firms and (ii) the second-best optimal taxes under imperfect competition could be less than, equal to, or greater than marginal external damages depending upon the curvature of market demand.     

On the Equivalence of Taxes Paid by Employers and Employees

In this paper we study the employment effects of a budget neutral restructuring of taxes levied on employers and employees. We derive conditions for taxes levied on workers to have the same employment effects as taxes levied on firms under standard processes of wage determination.     

Profit taxation and the mode of foreign market entry

Abstract This paper studies the role of profit taxation for an international firm's decision upon how to penetrate a foreign market – through exports or through foreign direct investment (FDI) and local supply. We show that with harmonized taxes the international firm may choose FDI even though this has welfare costs from a global point of view. With tax competition, the host country can enforce exporting instead of FDI. This leads to a Nash equilibrium associated with higher world welfare than harmonized taxes. Thus, because of the effect on entry mode, tax competition provides heretofore unexplored benefits as compared to tax harmonization.     

JOINT VENTURES, POLLUTION AND ENVIRONMENTAL POLICY

We examine the impact of emission taxes on the pollution level in a duopoly framework with endogenous market structure. We demonstrate that an increase in emission taxes could trigger a regime switch from joint ventures to Cournot competition, causing the pollution level to increase. Such a phenomenon is likely to happen when the concerned industry is reasonably profitable, and the synergistic gain between joint venture partners is not too strong. Moreover, emission taxes can implement the first best outcome if and only if the industry is not too polluting. In case it is, the second best level of taxes may or may not equal the optimal tax under either joint venture or Cournot competition.     

International Trade and the Environment: Theoretical and Policy Linkages

I review and extend three approaches to trade and environmental policies: competitive general equilibrium, oligopoly and monopolistic competition. The first two have surprisingly similar implications: deviations from first-best rules are justified only by constraints on policy choice (which motivates what I call a “single dividend” approach to environmental policy), and taxes and emissions standards differ in ways which reflect the Le Chatelier principle. I also show how environmental taxes may lead to a catastrophic relocation of industry in the presence of agglomeration effects, although not necessarily if there is a continuum of industries which differ in pollution intensity. *An earlier version was presented as an invited plenary lecture to the European Association for Environmental and Resource Economics Conference, Oslo, 1999.     

On the Double Dividend under Imperfect Competition

We investigate whether, and under which conditions, a revenue-neutral environmental tax reform may yield an employment double dividend, i.e., an improvement of environmental quality and an increase in aggregate employment. Using a model with two market imperfections – a rigid real wage and imperfect competition in one industry – we show that an employment dividend is plausibly obtained. However, for countries where labor taxes are high and households spend a large share of their income in favor of environmentally harmful consumption goods a double dividend can nevertheless not be obtained, for under these conditions environmental quality deteriorates.     

International commodity taxation in the presence of unemployment

In this paper, we evaluate the impact of commodity tax competition on welfare and employment under the destination and origin principles, when the labor market is imperfectly competitive owing to a binding fixed wage. Our main finding is that commodity taxation causes an employment externality whose signs may be opposite under the two principles. While tax competition leads to inefficient tax rates under both principles, we also prove that the origin principle guarantees lower unemployment and higher welfare when the fixed wage is high. Finally, we show that the employment externality still exists in a standard union model of wage determination.     

The Comparison between Ad Valorem and Unit Taxes under Monopolistic Competition

This paper shows that the welfare dominance of ad valorem over unit taxes under imperfect competition, extends to a Dixit-Stiglitz-type monopolistic competition framework with differentiated products, increasing returns to scale, entry/exit and love of variety. This result is obtained, even though ad valorem taxation leads to increased firm exit compared to the equal-yield unit tax. Yet the smaller tax over-shift, occurring under ad valorem taxation, more than compensates this disadvantage.Acknowledgement Comments and suggestions from Anthony Atkinson, Jürgen Bitzer, Rainald Borck, David Collie, Jan G. Jørgensen and two anonymous referees are gratefully acknowledged.     

Commodity Taxation and the Effects of Entry: A Case of Variety Preferences

We study the relationship between commodity taxation and the effect of entry with imperfect competition. We develop a simple general equilibrium model with imperfect competition in which consumers have variety preferences. As a result, we see that introducing specific taxes increases social welfare. Furthermore, we show that the optimal tax rule is contrary to the inverse elasticity rule.Acknowledgement We wish to thank two anonymous referees for their helpful comments.     

Environmental taxation,information precision,and information sharing

We analyze how environmental taxes should be optimally levied in a sequential game in which regulators and firms face costs uncertainties. First, the regulator chooses the intensity of emissions taxes to reduce externalities. Then, facing common and private information with noisy signals, firms compete in the marketplace and choose outputs. We show that, under nonuniform quality of signals across firms, the regulator may calibrate differentiated tax policy. We also show that the social impact of more precise private signals hinges largely and fundamentally on the value of the ratio of the slopes of the marginal damage and the marginal consumer surplus. Finally, we investigate information sharing between polluters and its impacts on welfare. We stress that, when there are threats of severe environmental damages under deep uncertainties, collusion is welfare reducing and may jeopardize the regulatory process. Regulators need to set an appropriate precautionary policy. Numerical simulations illustrate the results that the model delivers.     

UNCERTAIN INCOME,UNCERTAIN TAXES AND RICARDIAN EQUIVALENCE*

L. K. C. Chan (1983) and R. B. Barsky et al. (1986) have demonstrated that a tax cut financed by bonds to be repaid from proportional income taxes on uncertain future income, by reducing the latter's riskiness, stimulates current consumption - Ricardian equivalence does not hold. However, their two-period models exclude the possibility that future taxes are uncertain. In this paper a three-period model is developed that, by allowing the government two periods in which to collect taxes, introduces ex ante tax rate uncertainty. This renders the result concerning Ricardian equivalence ambiguous. By comparison, taxes levied as lump sums and via a ‘lottery’ respectively produce the ‘usual’ effects (zero and negative) on consumption.     

Tax Principles and Coordination of Trade and Domestic Policies Under Imperfect Competition

We construct an exporting monopoly model to compare destination‐ and origin‐based commodity taxes in a context of a trade and domestic tax reform. We show that an export tax reduction and a change in destination (resp. origin) tax that fix the world price is strictly Pareto‐improving (resp. deteriorating), which holds whether markets are integrated or segmented. This result may provide a new rationale for preferring the destination‐based consumption tax to the origin‐based production tax that has been discussed in the literature of tax harmonisation and tax competition.