Environmental Quality,Public Debt and Economic Development

This article analyzes the consequences on capital accumulation and environmental quality of environmental policies financed by public debt. A public sector of pollution abatement is financed by a tax or by public debt. We show that if the initial capital stock is high enough, the economy monotonically converges to a long-run steady state. On the contrary, when the initial capital stock is low, the economy is relegated to an environmental poverty trap. We also explore the implications of public policies on the trap and on the long-run stable steady state. In particular, we find that government should decrease debt and increase pollution abatement to promote capital accumulation and environmental quality at the stable long-run steady state. Finally, a welfare analysis shows that there exists a level of public debt that allows a long run steady state to be optimal.     

Fiscal policies, environmental pollution and economic growth

This paper develops a model of endogenous economic growth with special consideration to the role of productive public expenditure and environmental pollution; and analyses the properties of optimal fiscal policy in the steady state growth equilibrium. We consider the level of consumption as the source of pollution. Government allocates its tax revenue between pollution abatement expenditure and productive public expenditure. Optimum ratio of productive public expenditure to national income is equal to the competitive output share of the public input, when productive public expenditure is depicted as tax revenue minus abatement expenditure. However, the proportional income tax rate exceeds the competitive output share of the public input. There is no conflict between the social welfare maximizing solution and the growth rate maximizing solution in the steady state growth equilibrium. The unique steady state growth equilibrium appears to be a saddle-point when the growth rate is above a critical level and the steady state equilibrium growth rate in the market economy is not necessarily lower than the socially efficient growth rate.     

Tax smoothing and tariff behavior in the United States

This paper develops and tests a public finance theory of tariff behavior. Tariffs are viewed as being part of the optimum revenue raising tax package so that tariff revenue is closely tied to government spending. A key implication of the theory is that tariff rate movements should be consistent with tax-smoothing behavior. The test focuses on the United States during the years 1869–1916. The results of the test support the theory.     

Public Expenditure,Environment, and Economic Growth

This paper attempts to develop a model of endogenous growth with special consideration to the role of productive public expenditure in the presence of congestion effect of private capital and environmental pollution. We analyze the properties of the optimal fiscal policy in the steady‐state equilibrium when the level of production of the final good is the source of emission. Government allocates its income tax revenue between pollution abatement expenditure and productive public expenditure. In the steady‐state equilibrium, optimum ratio of productive public expenditure to national income is less than the competitive output share of the public input; and this ratio varies inversely with the magnitude of the emission‐output coefficient. The steady‐state equilibrium appears to be a saddle point; and the market economy growth rate is not necessarily less than the socially efficient growth rate in the steady‐state equilibrium.     

Human capital, inequality, endogenous growth and educational subsidy: A theoretical analysis

This paper develops an endogenous growth model with dualism in human capital accumulation of two types of individuals. The government imposes a proportional income tax on rich individuals and uses the tax revenue to finance the educational subsidy given to poor individuals. We find out the properties of the optimal tax financed educational subsidy policy in the semi-stationary equilibrium of the model using the technique of Stackelberg differential game.     

Strategic state-level environmental policy with asymmetric pollution spillovers

This paper examines the strategic behavior of state-level utility regulators in the context of the federal tradable emissions permits market when state-to-state pollution spillovers are asymmetric. Strategic behavior is possible because a state’s environmental policy indirectly affects the price of permits and, therefore, abatement in other states. We show that the optimal pollution penalty is comprised of two parts: (i) a Pigouvian tax, adjusted for state-to-state spillovers; and (ii) an optimal tariff designed to improve the terms of trade in permits. Generally, abatement costs are not minimized and the outcome is Pareto inefficient, regardless of the size of the market.     

Import Protection Bias

Rodrik (1995) notes that trade regimes tend to be biased towards import protection, while the standard political economy models either yield no prediction on the bias of the trade regime or predict, counterfactually, a bias towards the export sector. This constitutes an important shortcoming in the political economy of trade literature. In this paper, the Grossman and Helpman (1994 ) “Protection for Sale” model is extended by adding government expenditure. This expenditure may be financed via a combination of tariff revenue and a distorting wage tax. In addition to the government expenditure, export subsidies need to be financed either via tariff revenue or a distorting wage tax. With this addition, plausible values of the model's parameters yield import protection bias.     

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.     

TAX-PRICE REFORM WITH DIRECTLY UNPRODUCTIVE PROFIT-SEEKING (DUP) ACTIVITIES*

This paper explores the extent to which insights available from existing writings on directly unproductive profit-seeking (DUP) activities in international trade modify rules of tax and tariff reform in normative public economics and examines in what way these should affect advice on tax policy usually given to developing countries. The analysis proceeds by developing two models. The first incorporates revenue seeking directly into a standard open economy public finance model and examines whether analysis of policy reform and economic costs of distortionary tariffs must be modified. The second includes a political component in the form of lobbying for subsidies – the expenditure side of the budget – as well as a normative economic component that raises taxes – the revenue side – to finance the social costs of such lobbying. The model can be used to determine the effects of politically determined expenditures on tax setting. The analysis shows that the grammar of welfare-theoretic arguments that underlies the reform and design of tax and tariff structures is robust to the inclusion of DUP activities of the type considered here. In particular, the latter lend no presumption in favor of uniformity in tax and tariff structures. It is argued that existing policy advice on tax and tariff reform derived from models where DUP activities have traditionally played no role continues to be appropriate when account is taken of formal treatments of DUP-type phenomena extant in the current literature.     

How should environmental policy respond to business cycles? Optimal policy under persistent productivity shocks

How should environmental policy respond to economic fluctuations caused by persistent productivity shocks? This paper answers that question using a dynamic stochastic general equilibrium real business cycle model that includes a pollution externality. I first estimate the relationship between the cyclical components of carbon dioxide emissions and US GDP and find it to be inelastic. Using this result to calibrate the model, I find that optimal policy allows carbon emissions to be procyclical: increasing during expansions and decreasing during recessions. However, optimal policy dampens the procyclicality of emissions compared to the unregulated case. A price effect from costlier abatement during booms outweighs an income effect of greater demand for clean air. I also model a decentralized economy, where government chooses an emissions tax or quantity restriction and firms and consumers respond. The optimal emissions tax rate and the optimal emissions quota are both procyclical: during recessions, the tax rate and the emissions quota both decrease.     

Debt financing of public investment: On a popular misinterpretation of “the golden rule of public sector borrowing”

In this paper I challenge the proposition that the golden rule of public sector borrowing is consistent with the principle of intertemporal allocative efficiency, in the sense that growth-enhancing public investment justifies a structural public deficit. I demonstrate that in the long run the social opportunity cost of debt-financed public investment exceeds the social opportunity cost of tax financed public investments. This result holds if the social rate of time preference is lower than the interest rate on government borrowing. Thus a benevolent government would use taxes to finance public investment. In the short run, debt financing is justified if public investment has a considerable growth effect on private consumption. This requires a corresponding initial undersupply of public capital.     

Aggressive oil extraction and precautionary saving: Coping with volatility

The effects of stochastic oil demand on optimal oil extraction paths and tax, spending and government debt policies are analyzed when the oil demand schedule is linear and preferences quadratic. Without prudence, optimal oil extraction is governed by the Hotelling rule and optimal budgetary policies by the tax and consumption smoothing principle. Volatile oil demand brings forward oil extraction and induces a bigger government surplus. With prudence, the government depletes oil reserves even more aggressively and engages in additional precautionary saving financed by postponing spending and bringing taxes forward, especially if it has substantial monopoly power on the oil market, gives high priority to the public spending target, is very prudent, and future oil demand has high variance. Uncertain economic prospects induce even higher precautionary saving and, if non-oil revenue shocks and oil revenue shocks are positively correlated, even more aggressive oil extraction. In contrast, prudent governments deliberately underestimate oil reserves which induce less aggressive oil depletion and less government saving, but less so if uncertainty about reserves and oil demand are positively correlated.     

Optimal policy for environmental goods trade in asymmetric oligopolistic eco-industries

In this paper, we examine the optimal structure of an environmental tax to pollution, a production subsidy to a domestic eco-industry, and an import tariff on environmental goods (EGs) in a two-country model where the home country imports EGs from the foreign country. Home and foreign firms that produce EGs engage in Cournot competition. We then assume that the number of the home local firms which produce EGs is constant, but that of the foreign firms is variable. Our main findings are as follows: (I) The optimal environmental tax level may be lower than the Pigouvian level even if the tax has a positive impact on the output of EGs produced by a domestic firm. (II) The optimal tariff level may be positive when the country implements the first best policy combination in a closed economy regarding the environmental tax and the subsidy. (III) The optimal subsidy level may be positive, and then the subsidy may be substitutive for the import tariff on EGs.     

Foreign Aid,Government Spending,and the Environment

Using an endogenous growth model, this paper examines the growth and welfare effects of the allocation of foreign aid in the recipient economy. As public inputs are a productive factor, a rise in the allocation of aid to the public inputs increases growth and hence the welfare of the economy. However, raising the ratio of aid to pollution abatement may not help an economy, because it crowds out public inputs. Since public inputs are also partly financed by income taxation, the welfare‐maximizing income tax rate is larger than the growth‐maximizing rate, because a portion of the aid constitutes a lump‐sum transfer and can increase household consumption and hence welfare.     

Are short‐term effects of pollution important for growth and optimal fiscal policy?

We study optimal fiscal policy in a stock‐flow model of the environment within an endogenous growth framework, where some pollutants have a lasting impact on environmental quality which is restored through abatement expenditure, while others dissipate and hence, have a short‐term effect on the environment. All pollutants, however, affect the productivity of a public good negatively. Given that short‐term pollution, although it dissipates, is irreversible in this sense, a government cannot ignore its negative effects since this type of pollution lowers the productivity of all inputs. We find that a larger negative effect of short‐term pollutants as well as a higher congestion effect of private capital leads to corrective fiscal policies with higher optimal income tax and abatement expenditure rates, which have favorable growth consequences. Interestingly, we find that the rate of short‐term pollution does not affect optimal fiscal policy while that of the long‐term pollution does.     

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.     

The optimal treatment of tax expenditures

This paper analyzes the optimal treatment of tax expenditures. It develops an optimal tax model where individuals derive utility from spending on a “contribution” good such as charitable giving. The contribution good has also a public good effect on all individuals in the economy. The government imposes linear taxes on earnings and on the contribution good so as to maximize welfare. The government may also finance directly the contribution good out of tax revenue. Optimal tax and subsidy rates on earnings and the contribution good are expressed in terms of empirically estimable parameters and the redistributive tastes of the government. The optimal subsidy on the contribution good is increasing in the size of the price elasticity of contributions, the size of the crowding out effect of public contributions on private contributions, and the size of the public good effect of the contribution good. Numerical simulations show that the optimal subsidy on contributions is fairly sensitive to the size of these parameters but that, in most cases, it should be lower than the earnings tax rate.     

Composition of Government Budget, Non-Single Peakedness, and Majority Voting

In this paper we study whether majority voting equilibria exist when preferences over public policies are not single peaked. The government levies a proportional income tax. Tax revenue is used to finance a uniform lump-sum transfer and public education. Individuals vote on the composition of the government budget. We show that the single-crossing property cannot be invoked to establish existence of a majority voting equilibrium. In a simple parametric example we find that cycles are pervasive.     

Endogenous money,inflation, and welfare

This paper addresses the classic question: what are the welfare costs of inflation. We employ a model in which the ratios of currency to deposits and currency to reserves are endogenously determined. The model distinguishes quantitatively between three sources of welfare cost of inflation, and provides further estimates for potential welfare gains from improvements in transaction technologies. Estimates of the marginal cost of public funds associated with the inflation tax are compared both with that of labor taxation within the model and with those reported in the public finance and macro literature. We conclude that not only is inflation an inefficient source of government revenue, but also that, in the absence of lump-sum taxation, deflationary policies may be highly inefficient.     

PUBLIC INVESTMENT,TAX EVASION,AND THE WELFARE EFFECTS OF A TARIFF REFORM

Contrary to the case considered in literature, the experience of developing countries indicates that the tariff reforms have not been revenue neutral due to the heavy dependence of developing countries on trade taxes and pervasive tax evasion. In contrast to the plausibility of a welfare loss shown by the current literature, when the adverse effect of the loss of tariff revenue on public investment is factored in, the welfare outcome of the tariff reforms of past few decades turns out to be much more pessimistic. The constraints imposed by tariff dependence and tax evasion imply that future tariff reforms in these countries should be undertaken after strengthening their domestic tax system and augmenting the ability of their governments to fight tax evasion. For countries of sub‐Saharan Africa, where such reforms are likely to be concentrated, this would need planning and capacity building over a longer time horizon. (JEL D61, D62, F13, H26)