Pollution, Capital Mobility and Tax Policies with Unemployment

In this paper we highlight aspects related to the links among unemployment, international capital mobility, and tax policies in a small open developing economy. Without international capital mobility, the joint optimal trade and environmental policies require a zero tariff and an emission tax lower than the Pigouvian tax. With international capital mobility and a capital tax (subsidy), the optimal emission tax rate is smaller (larger) compared to the rate when capital is untaxed. When both the emission tax and the capital tax/subsidy are jointly chosen optimally, then the optimal policy on capital is a lower subsidy, or even a tax, compared to the standard capital subsidy of the no pollution case.     

Externalities of investment, education and economic growth

We present a growth model in which investment in physical capital shows positive externalities which build up knowledge capital. A prerequisite for these spillovers to take place is that a country devotes time to education. Externalities associated with investment need education to raise the stock of knowledge capital. Analysing the competitive economy we demonstrate that the model may explain why some low-income countries show convergence whereas others do not. Furthermore, we demonstrate that in the social optimum the level of investment is always higher than in the competitive economy whereas the time spent for education may be lower or higher. We also show how the competitive economy may replicate the social optimum for an appropriate choice of a lump-sum tax and an investment subsidy. Empirical evidence is provided in order to demonstrate the plausibility of our model.     

Disutility of pollution and endogenous growth

Endogenous growth is generally built on a positive externality hypothesis which is the opposite of a negative externality caused by pollution. We study a linear technology with simple assumption: an aggregate capital stock which represents a learning by doing effect and a pollution flow proportional to production. In this framework, we analyse the precise effects on growth of the disutility of pollution and its interaction with the utility of consumption in an economy without abatement technology. The decentralized equilibrium always leads to unlimited growth, but optimal growth is often limited (the negative effect of pollution dominating the positive effect of learning by doing). In this case, the optimal policy which leads the decentralized economy to follow the optimal growth path is to tax capital; in contrast with the optimal subsidy policy in an economy without pollution. When an abatement technology is introduced, the optimal solution can lead the economy to unlimited growth, whatever the form of the utility function.     

Economic growth and polluting resources: Market equilibrium and optimal policies

This paper develops an endogenous growth model to study the decentralized equilibrium and the optimum conditions in an economy which uses polluting resources. The model includes two policy instruments, a subsidy to final consumption and an emissions tax. It also considers two forms of endogenous technical change, pollution-reducing knowledge and horizontal innovation. We show that, if the efficiency of knowledge to reduce emissions is sufficiently high, a higher output is compatible with lower emissions in both levels and growth rates. Additionally, if the two instruments are used together the economy may achieve a higher output and lower emissions since the subsidy may offset, at least partially, the negative tax effects.     

排污权交易政策对企业环保行为的传导机制研究

从企业的目标函数和生产函数两个角度出发,分析了排污权交易政策对企业环保行为的影响机理,并讨论了排污权交易政策下企业的环保行为选择。研究发现：排污权交易政策通过影响企业的资本要素分配,从而影响企业环境资源的使用成本,进而影响企业的生产和环保行为决策;在排污权交易政策的作用下,企业主要采取不同的污染治理投资策略来满足该政策的规制。基于此,政府应制定配套政策和措施,引导企业沿着“政策遵从—环保投资策略—新环保技术采纳”的行为选择路径进行行为决策,以实现排污权交易政策的目标。     

Investment Cycles and Sovereign Debt Overhang

We characterize optimal taxation of foreign capital and optimal sovereign debt policy in a small open economy where the government cannot commit to policy, seeks to insure a risk-averse domestic constituency, and is more impatient than the market. Optimal policy generates long-run cycles in both sovereign debt and foreign direct investment in an environment in which the first best capital stock is a constant. The expected tax on capital endogenously varies with the state of the economy, and investment is distorted by more in recessions than in booms, amplifying the effect of shocks. The government's lack of commitment induces a negative correlation between investment and the stock of government debt, a "debt overhang" effect. Debt relief is never Pareto improving and cannot affect the long-run level of investment. Furthermore, restricting the government to a balanced budget can eliminate the cyclical distortion of investment.     

Environment,Directed Technical Change and Economic Policy

We study the effects of an economic policy in an endogenous growth general equilibrium framework where production of consumption goods requires two resource inputs: a polluting non-renewable resource and a non-polluting labour resource. The use of the former contributes to the accumulation of pollution in the atmosphere, which affects welfare. There is a specific research sector associated with each of those resources. We provide a full welfare analysis, and we describe the equilibrium paths in a decentralized economy. We go on to study the effects of three associated economic policy tools: a tax on the polluting resource, and two research subsidies. We show that the optimal environmental policy has two main effects; it delays the extraction of the resource and with it the level of polluting emissions and it reallocates research efforts, decreasing the amount put into “grey” research to the benefit of “green” research. We also show that the environmental policy is grey-biased in the short-term, and green-biased in the long-term. Finally, we compute the optimal values for these tools.      

Foreign-Investment Tax and Tariff Policies in Developing Countries

In this paper we examine the welfare effects of tax on foreign capital and tariff policies for a small open economy with sectoral unemployment. The individually and jointly optimal tax and tariff rates in the absence or presence of international tax credits are derived. A subsidy on foreign capital coupled with a tariff can be jointly optimal when tax credits are absent in the source country. However, the capital subsidy policy may fail to hold when the foreign country follows a tax credit system.     

The incidence of a tax on pure rent in a small open economy

This paper analyzes the effects of a land rent tax on capital formation and foreign investment in a life-cycle small open economy with endogenous labor-leisure choices. The consequences of land taxation critically depend on how the tax proceeds are used by the government. A land tax depresses capital formation, crowds out foreign investment and increases national wealth and consumption when the land tax revenues are distributed as lump-sum payments. If the proceeds from land taxation are used to finance unproductive government expenditure, the land tax will be neutral in its effects on the capital stock, nonhuman wealth and labor. When the tax revenues are used to reduce labor taxes, the land rent tax spurs nonhuman wealth accumulation and ambiguously affects the capital stock and labor.     

Investment with Uncertain Tax Policy: Does Random Tax Policy Discourage Investment

We consider the impact of tax policy uncertainty on firm level and aggregate investment, comparing investment behaviour when uncertainty is due to a shock following Geometric Brownian Motion (GBM) versus when random discrete jumps in tax policy occur. Expectations of the likelihood of a tax policy switch have an important negative impact on the gain to delaying investment in the latter model and time to investment can fall with increasing tax policy uncertainty. Aggregate investment simulations indicate that capital formation is adversely affected by increases in uncertainty in the traditional GBM model but can be enhanced in the jump process model.     

Why Finance Ministers Favor Carbon Taxes,Even If They Do Not Take Climate Change into Account

Fiscal considerations may shift governmental priorities away from environmental concerns: finance ministers face strong demand for public expenditures such as infrastructure investments but they are constrained by international tax competition. We develop a multi-region model of tax competition and resource extraction to assess the fiscal incentive of imposing a tax on carbon rather than on capital. We explicitly model international capital and resource markets, as well as intertemporal capital accumulation and resource extraction. While fossil resources give rise to scarcity rents, capital does not. With carbon taxes, the rents can be captured and invested in infrastructure, which leads to higher welfare than under capital taxation. This result holds even without modeling environmental damages. It is robust under a variation of the behavioral assumptions of resource importers to coordinate their actions, and a resource exporter’s ability to counteract carbon policies. Further, no green paradox occurs—instead, the carbon tax constitutes a viable green policy, since it postpones extraction and reduces cumulative emissions.     

Optimal fiscal policy in the Uzawa-Lucas model with externalities

Summary. This paper devises a fiscal policy by means of which the first-best optimum equilibrium is attained as a market equilibrium in the Uzawa-Lucas model when average human capital has an external effect on productivity. The optimal policy requires the use of a subsidy to investment in human capital which can be financed by a tax on labor income. Lump-sum taxation is not required to balance the government budget either in the steady state or in the transitional phase. Physical capital income should not be taxed. Alternatively, the optimal growth path can be attained by means of a subsidy to human capital. Received: March 21, 2002; revised version: September 4, 2002 RID="*" ID="*" Financial support from the Spanish Ministry of Science and Technology through PNICDYIT grant SEC2002-03663 is gratefully acknowledged.     

Market power and output-based refunding of environmental policy revenues

Output-based refunding of environmental policy revenues combines a tax on emissions with a production subsidy, typically in a revenue-neutral fashion. With imperfect competition, subsidies can alleviate output underprovision. However, when market shares are significant, endogenous refunding reduces abatement incentives and the marginal net tax or subsidy. If market shares differ, marginal abatement costs will not be equalized, and production is shifted among participants. In an asymmetric Cournot duopoly, endogenous refunding leads to higher output, emissions, and overall costs compared with a fixed rebate program targeting the same emissions intensity. These results hold whether emissions rates are determined simultaneously with output or strategically in a two-stage model.     

On the Efficiency of Green Trade Policy

The paper derives conditions for second best environmental policy when there are foreign countries which fail to implement appropriate environmental regulations. It is shown that in such cases, efficiency in the global economy will not be achieved unless domestic environmental regulations are supplemented by trade provisions. The result is independent of whether environmental problems are local or international. Furthermore, when trade provisions are implemented, efficiency requires that domestic environmental taxes are fixed at the Pigouvian tax rate. The results imply that there is an economic rationale for regulating the trade between signatories and non-signatories of international environmental agreements. Efficient trade regulations will either take the form of trade restrictions or trade promotions, depending on whether the environmental problem is created by production or consumption activities, and whether the net import of the relevant commodity is positive or negative. It is argued that an efficient climate agreement, signed by a group of fuel-importing countries (e.g., the OECD countries), should include a subsidy on the import of fossil fuels.     

Environmental Goods and Measures for Their Promotion: An Analysis Using a Fair Wage Model

In this paper, we model a two‐sector small open economy with emissions and unemployment associated with the fair wage effort hypothesis, and investigate the environmental and employment impact of an emission tax, a subsidy for purchasing environmental goods in the downstream polluting industry, and a subsidy to the upstream eco‐industry. We then show that if the eco‐industry is skilled labor intensive relative to the polluting final goods industry, while a subsidy for purchasing environmental goods decreases the unemployment rate of unskilled labor, it may increase total emissions. In contrast, the emission tax and the subsidy to eco‐industry firms worsen the unemployment rate, though both policies decrease total emissions. Hence, if the emission tax is set equal to the marginal environmental damage, and either a downstream or upstream subsidy is used to mitigate unskilled unemployment, the optimal subsidy to purchase the goods is positive whereas the optimal subsidy to the eco‐industry is negative, i.e., a tax on the eco‐industry.     

Net national emissions, CO2 taxation and the role of forestry

The concept of net national emissions suggests that accumulation of carbon in forestry should be taken into account when countries buy CO₂ permits or pay CO₂ taxes. The paper analyses the question of the correct tax/subsidy programme for giving proper incentives to forest owners and utilizers of wood. The analysis uses a dynamic general equilibrium model with productive capital and the stock of forests as state variables. It turns out that in a decentralized economy forest owners should be subsidized and CO₂ emissions should be taxed independently of whether they originates from wood or fossil fuels.     

How do market reforms affect China's responsiveness to environmental policy?

A large percentage of total investment in China is allocated by the central government at below-market interest rates in pursuit of non-economic objectives. This has resulted in low rates of return and a high number of non-performing loans, threatening the future health of the Chinese economy. As a result, reform of capital markets is a high priority of the Chinese government. At the same time, the country is implementing various environmental policies to deal with serious pollution issues. In this paper we ask how reforms of the capital market will affect the functioning of a carbon tax. This allows us to assess how China's willingness to join global efforts to reduce carbon emissions is influenced by China's current efforts to reduce investment subsidies. We compare the costs of a carbon tax in a reformed economy with the costs of a carbon tax in the current subsidized economy. We find that in the subsidized economy the tax-interaction effect dampens the effect of a carbon tax resulting in smaller reductions in emissions than what would result in a reformed economy. Importantly, we also find that the effect on economic welfare from a carbon tax is lower in the subsidized economy; in fact, for lower levels of reductions, the carbon tax is actually welfare improving. These results have important implications for an economy undergoing economic transition. The carbon tax rate required to achieve a certain level of emission reductions will be higher in an economy with capital subsidies. However, the welfare implications of the tax indicate that the current system with capital subsidies is highly distorting implying that there is a high efficiency cost for the non-economic objectives the government is pursuing by maintaining this system of subsidies.     

我国绿色税收政策效果分析及改革设想

我国在经济快速发展过程中出现了许多社会问题,其中环境污染是最严峻的问题之一。税收政策在促进环境改善方面具有十分明显的作用,通过制定税收政策引导企业经营方式的改变,从而实现环境改善已是各国的通行作法。与欧美国家相比我国税制的绿化程度很低,且不成体系。与生态环境有关的税收政策,散见于资源税、消费税、企业所得税等税种中,许多仍以费的形式存在,有较大的空间。应在借鉴国外绿色税收政策成功作法和经验的基础上,增加现行税种的环境保护功能,实行专门的环保税种,实行费改税等。     

Political Measures for Strategic Environmental Policy with External Effects

This paper investigates an environmental policy designed to reduce the emission of pollutants under uncertainty, with the agent problem as an optimal stopping problem. We first analyze the two cases in which there are one agent and two competing agents by following Ohyama and Tsujimura (2005). When we consider a model of strategic agents, we need to analyze the external economic effect that is peculiar to an agent’s environmental policy implementation. Then, to improve and resolve these external effects, we examine three alternative political measures, comprising an environmental subsidy, an environmental tax and an emission trading system. The results of the analysis indicate that the environmental subsidy and environmental tax promote environmental policy. However, they do not create an incentive to be the leader. On the other hand, an emissions trading system not only promotes environmental policy but also creates an incentive for leadership.This paper was previously circulated under the title “Political Measures for Strategic Environmental Policy with Induced Effects”. The authors would like to thank Masaaki Kijima for helpful comments. The authors would also like to thank Alistair Munro and two anonymous referees providing detailed comments and suggestions. This research was partially supported by Daiwa Securities Group Inc. The second-named author was partially supported by the Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research (B) (2), 16310118.     

Optimal combination of innovation and environmental policies under technology licensing

Under what conditions will a carbon tax encourage environmental innovation? Can a regulator design an optimal environmental policy to reduce emissions and to promote clean technologies? This paper studies optimal environmental policy in the situation where a monopoly innovator develops and licenses clean production technologies to downstream polluting firms. We find that (i) a higher emission tax will encourage innovation when the burden of the tax payment in the polluters' costs and/or the price-elasticity of the demand for polluting goods are small, (ii) the innovation-inducing effects of emission tax are inversely related to the emission-reduction (Pigouvian) effects of the tax, and (iii) the social optimum can be achieved by the mix of tax and subsidy. We also show that if the policy instrument is limited to the tax, the second-best tax rate would lie between the marginal damage and the first-best rate. By performing numerical simulations, we also demonstrate that the optimal mix of the emission tax and R&D subsidy can have “double dividend” benefits.