Brian Barton
The concept of a pollution tax was introduced by economist Arthur Cecil Pigou in the 1920s. It is based on the idea that negative externalities caused by market interactions justify government intervention. A pollution tax is a market-based system that provides an incentive for firms to reduce pollution and economize their use of the environment. There are various methods to determine the tax amount on a polluting firm, such as a two-part pollution tax with a low or zero tax up to a certain amount, and a higher tax thereafter. Another method is the cap-and-trade system, where the government assigns transferable pollution rights to firms, with the available amount capped at the overall emissions goal. While these approaches offer flexibility to firms and can lead to cost savings, they also face criticism and resistance due to potential drawbacks, such as the concentration of pollution in economically disadvantaged areas.
| Characteristics | Values |
|---|---|
| Type of tax | Carbon tax, emissions tax, pollution tax |
| Basis for tax amount | Marginal abatement cost, benefit-cost analysis, tax where marginal benefit equals marginal abatement cost |
| Tax structure | Two-part tax with low or zero tax and a higher tax thereafter, revenue-neutral tax, Pigouvian tax, direct tax |
| Tax amount | Greater than the damages generated by pollution |
| Alternative to direct tax | Cap-and-trade system, transferable rights to pollute, tradable permits |
| Effect of tax | Incentive for firms to reduce pollution, increase in economic efficiency, reduction in distortionary taxes |
| Considerations | Equity concerns, environmental issues, market inefficiencies, flexibility across firms, compliance costs, monitoring and enforcement difficulty, risk of non-compliance |
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What You'll Learn
The 'polluter pays' principle
The polluter pays principle (PPP) is a commonly accepted practice that those who produce pollution should bear the costs of managing it to prevent damage to human health or the environment. The idea is that the polluter should pay for the price of measures taken to prevent, control and remedy pollution and the costs imposed on society, such as those associated with impacts on health, loss of ecosystem services, or the economy.
The PPP is a tool to respond to market failure where the price of goods and services incurred by the polluter does not fully reflect these costs. Market prices are distorted, and the polluter is not sufficiently incentivised to prevent pollution. The PPP corrects the market mechanism by introducing the right price signals, which provides an incentive for pollution reduction and investments towards clean technology. It shifts the burden of pollution from society onto polluters.
The PPP can be applied to greenhouse gas emitters through a so-called 'carbon price'. This imposes a charge on the emission of greenhouse gases equivalent to the corresponding potential cost caused by future climate change, forcing emitters to take on the cost of pollution. This is called the Social Cost of Carbon (SCC), which many mainstream economists consider the best method for pricing carbon. Alternatively, the carbon price can be based on desired outcomes, calibrated to achieve a certain emissions target by a specific date, such as net zero by 2050. This is commonly referred to as a 'target consistent' approach.
There are various ways to implement the PPP. One is through a straightforward price-based mechanism in the form of a carbon tax. Another is through a tradable permit system, where a fixed number of permits is allocated, each allowing the emission of a fixed amount of carbon. An important feature of these emission permits is that they can be traded in a market, so a permit holder can either use their permit to emit carbon or sell it to someone else. Under some economic assumptions, the market price for permits provides incentives to emit less carbon at the lowest total social cost.
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Tradable permits
The tradable permit system provides incentives for firms to reduce their emissions. Firms that emit less carbon than their allocated permits can sell their extra permits to other firms or save them for future use. This encourages energy conservation and the development of innovative technologies to reduce pollution cost-effectively. The market price for permits also encourages firms to emit less carbon at the lowest total social cost. Over time, as demand for permits decreases, the price of permits will also decrease, and the government can respond by reducing the supply of permits, leading to a decline in pollution.
The allocation of permits can be challenging, and the most commonly used method is the sealed bid auction, where buyers submit bids in sealed envelopes. This method helps prevent monopoly power and enhances price stability, allowing for better planning of pollution control by firms. However, there is potential for manipulation of pollution levels and production shifts to countries with looser environmental standards.
In summary, tradable permits provide a flexible approach to pollution reduction, allowing firms to respond to market prices for permits. This system encourages energy conservation, technological innovation, and a decrease in pollution levels over time. While challenges exist in implementing tradable permit systems, they offer a market-based solution to address negative externalities caused by pollution.
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Revenue-neutral shift
A revenue-neutral shift is a way to make a carbon tax more politically acceptable by reducing other taxes by the amount of revenue generated from the carbon tax. This can be done by either using the revenue to reduce distortionary taxes on labour or investment, or by returning the carbon tax revenues to the public through carbon dividends or tax-shifting.
The idea of a revenue-neutral carbon tax is to protect poorer households, who would otherwise be disproportionately affected by a carbon tax, and to make it easier to raise tax levels over time. For example, in British Columbia, a revenue-neutral carbon tax was gradually increased in four annual increments and has remained politically popular while driving down emissions. Similarly, in 2018, Canada enacted a revenue-neutral carbon levy, fulfilling Prime Minister Justin Trudeau's campaign pledge.
One way to achieve revenue neutrality is through carbon dividends, where a portion of the carbon tax revenue is used to reduce regressive taxes such as payroll tax or sales tax. This can make carbon taxes income-progressive, as most poor households will get more back in their carbon dividends than they will pay in carbon tax. An early proponent of this approach was Al Gore, who argued for taxing pollution instead of income.
Another approach is tax-shifting, where each dollar of carbon tax revenue triggers a dollar's worth of reduction in existing taxes. While this method is less direct than carbon dividends, it still ensures that the carbon tax is revenue-neutral and offers important benefits such as stimulating employment by reducing payroll taxes. Additionally, tax-shifting preserves the incentive for individuals to reduce their use of fossil fuels, as their benefits are not tied to their energy consumption or carbon tax bill.
However, some critics argue that a revenue-neutral carbon tax is not enough to address the negative impact on poor households. For example, the French "gilets jaunes" movement protested against a price increase designed to reduce the use of fossil fuels, arguing that it made the poor even poorer. Proponents of a Green New Deal suggest that providing tangible benefits to all of society is a more effective way to gain support for the energy transition.
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Two-part pollution tax
A two-part pollution tax is a market-based system that can be used to reduce pollution and improve the environment. This system involves a low or zero tax up to a certain amount and a higher tax beyond that breakpoint. This approach provides three policy tools: the initial tax, the breakpoint, and the higher tax.
The two-part pollution tax is designed to be revenue neutral, which can lead to greater efficiency in energy use and other sectors of the economy. For example, pollution taxes could offset tax credits for technology development, encouraging firms to invest in cleaner technologies. This approach aligns with the double dividend hypothesis, which suggests that environmental taxes can enhance economic welfare by reducing distortionary taxes on labour or investment.
The two-part pollution tax is a flexible approach that allows firms to respond to the price of pollution. Firms have an incentive to reduce pollution if the cost of pollution-prevention measures is less than paying the tax. This system can be applied to both point sources, which emit at specific locations, and non-point sources, which are more diffuse and challenging to regulate.
The benefit of the two-part pollution tax is that it provides a financial incentive for firms to reduce their pollution levels. However, one argument against pollution taxes is that they can be considered punitive by businesses, and there are few real-world examples of successful implementation. Additionally, while pollution taxes can generate revenue, they do not impose emission limits, potentially leading to excessively high pollution levels.
Overall, the two-part pollution tax is a market-based approach that provides flexibility to firms and incentives to reduce pollution. It aims to improve the environment and enhance economic efficiency by providing policy tools and generating revenue that can be used to reduce other distortionary taxes.
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Command-and-control policies
These types of policies have been successful in protecting and cleaning up the environment, particularly in the United States during the late 1960s and early 1970s. However, they have been criticised for providing no incentive for firms to go beyond the limits set, offering limited flexibility on where and how to reduce pollution, and often containing politically-motivated loopholes.
In recent decades, the international nature of many environmental issues has exposed the limitations of command-and-control approaches. The shift away from these policies has been influenced by the increased participation of various actors, such as environmental NGOs, in policy-making. Market-based systems, such as pollution taxes and cap-and-trade regimes, are now considered superior as they provide regulated firms with more flexibility to respond to the price of pollution.
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Frequently asked questions
The tax amount is determined by the amount of pollution a firm generates. The tax bill will be greater than the marginal abatement cost bill to the left of the optimal abatement level, and the polluting firm will choose to abate. To the right of the optimal abatement level, the marginal abatement cost bill is greater than the tax bill, so the firm will choose to pay the tax and generate emissions.
A pollution tax incentivizes firms to reduce their pollution output and economize their use of the environment. It is based on the "polluter pays" principle, where a company that causes pollution should pay for the cost of removing it or provide compensation to those affected.
Yes, one alternative is a cap-and-trade system, where the government sets a cap on emissions and firms can trade permits to emit up to that cap. Another alternative is a two-part pollution tax, with a low or zero tax up to a certain amount and a higher tax beyond that breakpoint.
