Maya Ellison
Plastic bags are a common, convenient, and often free product with a serious environmental impact. They contribute to pollution, especially in oceans, and are a waste of resources. The question of whether they are demerit goods is an important one, as this classification would imply that they are over-consumed and have negative externalities. Demerit goods are often taxed or regulated by governments to reduce their consumption and negative impact. Plastic bags have been taxed in Denmark, Ireland, the UK, and other places, and banned in Bangladesh and India. This suggests that they are indeed demerit goods, but the classification is subjective and depends on value judgments.
| Characteristics | Values |
|---|---|
| Over-consumed | Plastic bags are over-consumed because consumers do not realise the harm they cause. |
| Negative externalities | Plastic bags cause harm to the environment and wildlife, especially in oceans. |
| Market failure | Plastic bags are a market failure because they cannot be recycled, reused, or reduced. |
| Allocative inefficiency | The cost of producing plastic bags is higher than the value society places on them. |
| Social undesirability | Plastic bags are deemed socially undesirable by governments. |
| Lack of consumer awareness | Consumers are not fully aware of the costs of using plastic bags. |
| Taxation | Some countries have introduced taxes on plastic bags to reduce their use. |
| Bans | Some countries have banned the use of plastic bags to prevent waste production. |
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What You'll Learn
Plastic bags as a market failure
Plastic bags are considered a market failure due to their contribution to environmental pollution and their classification as a demerit good. Demerit goods are goods that are overconsumed and create negative externalities, such as environmental harm and increased societal costs.
Plastic bags, particularly single-use plastic bags, have a significant environmental impact. They take hundreds of years to degrade and often end up in oceans and waterways, causing serious harm to marine life. The production and disposal of plastic bags also contribute to environmental pollution. For instance, the San Francisco Department of the Environment (SFDOE) estimated the cost of cleaning up and processing plastic bags in landfills to be 17 cents per bag, amounting to $8.5 million annually for the city of San Francisco.
The overconsumption of plastic bags can be attributed to their perceived zero cost to consumers and marginal cost to retailers. This lack of awareness about the true costs of plastic bags, including their environmental and societal impacts, has led to inefficient resource allocation and market failure. As a result, governments have intervened with policies such as taxes and bans to reduce plastic bag usage and address the market failure.
The classification of plastic bags as a demerit good further reinforces their market failure status. Demerit goods are goods that are overconsumed and have negative externalities, similar to other demerit goods like fast food, alcohol, tobacco, and gambling. The negative externalities associated with plastic bags include environmental pollution, ocean contamination, and the presence of microplastics in the food chain. These externalities impose costs on society beyond the individual consumer, such as increased cleanup costs and potential health risks.
To address the market failure of plastic bags, governments have implemented various measures. These include command-and-control regulations (bans) and direct price interventions (fees and taxes). For example, Ireland introduced environmental taxation on plastic bags in 2002, while Bangladesh implemented a regulatory ban. Over 140 cities, states, and nations have since followed suit with some form of plastic bag reduction policy.
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Plastic bags and negative externalities
Plastic bags are a demerit good, as they generate negative externalities that impose costs on third parties beyond the individual consumer. Negative externalities are third-party costs from consumption that are incurred without compensation. The use of plastic bags has led to significant environmental concerns, including reports of littering, lack of biodegradability in landfills, and ocean contamination.
Plastic bags were initially introduced to the US market in the 1950s for packaging items, and in the 1970s, they became mainstream as shopping carrier bags. For thirty years, demand soared as plastic bags offered consumers a cheap and convenient option. However, their proliferation without effective disposal mechanisms led to a market failure. Consumers often do not recycle plastic bags, and the marginal cost to retailers and perceived zero cost to consumers led to over-exploitation and a "Tragedy of the Commons" scenario.
The negative externalities associated with plastic bags include environmental pollution, harm to wildlife, and increased clean-up costs for governments and communities. Plastic bags take hundreds of years to degrade and frequently end up in oceans and waterways, causing serious harm to marine life. The San Francisco Department of the Environment (SFDOE) estimated the cost of cleaning up and processing plastic bags in landfills at 17 cents per bag, totalling $8.5 million annually for the city.
To address these negative externalities, governments have implemented command-and-control regulations (bans) and direct price interventions (fees and taxes). Ireland and Bangladesh were the first nations to introduce policies on plastic bags in 2002, and over 140 cities, states, and nations have since followed suit. Denmark was the first country to impose a tax on plastic bags in 1994, and the United Kingdom introduced a similar tax in 2015, which has helped reduce plastic waste.
The reduction in plastic bag usage has been accompanied by an increase in reusable bag imports to the US, which offer environmental benefits and reduce littering. However, it is important to ensure that reusable bags do not fall prey to the same market failure mechanisms that plagued plastic bags, such as a lack of recycling.
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Plastic bags as a common good
Plastic bags are a common good that has been over-exploited by consumers and suppliers without proper disposal methods in place. They are made from fossil fuels and are a major source of pollution, particularly in oceans and waterways, where they cause serious harm to marine life. Birds often mistake shredded plastic bags for food, and sea turtles cannot distinguish between jellyfish and floating plastic bags. Fish consume thousands of tons of plastic per year, transferring it up the food chain to bigger fish and marine mammals. Microplastics are also consumed by people through food and air, with an estimated global consumption of the equivalent of a credit card of plastic every week.
Plastic bags have a long degradation time, taking up to 1,000 years to break down in landfills. Even then, they do not break down completely but instead photo-degrade, becoming microplastics that absorb toxins and continue to pollute the environment. The environmental impact of plastic bags is further exacerbated by their limited biodegradability and the challenges associated with recycling them due to contamination issues and low density.
The over-exploitation of plastic bags as a common good has resulted in significant negative externalities, including environmental pollution, harm to wildlife, and increased healthcare costs for humans. To address this market failure, governments have implemented policies such as bans, fees, and taxes on plastic bags. For example, in 2002, Ireland introduced an environmental tax, and Bangladesh implemented a regulatory ban, becoming the first nations to introduce such policies. As of July 2018, 127 countries have adopted some form of legislation to regulate plastic bags.
While reusable bags are promoted as a more environmentally friendly alternative, they also have their limitations. The production of sturdier bags requires more resources and materials, resulting in a larger environmental footprint. Additionally, the accumulation of numerous reusable bags can defeat the purpose of reducing overall consumption. Therefore, it is crucial to reuse bags as many times as possible to minimize their environmental impact.
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Plastic bag reduction policies
Plastic bags are a demerit good because they contribute to environmental pollution and harm wildlife. Plastic bag policies have been widely effective in limiting shoreline plastic bag debris. Over 140 cities, states, and nations have implemented some form of plastic bag reduction policy. Some of the most common approaches include:
Bans
Single-use plastic bag bans have successfully reduced plastic bag use and associated litter and pollution. Well-designed bans encourage shoppers to bring reusable bags or hand-carry their purchases. States and cities with such bans have cut single-use plastic bag consumption by about 6 billion bags per year. However, partial bans have been shown to have the smallest and least precise effects, likely because thicker plastic bags are often exempted.
Fees and taxes
Fees and taxes on plastic bags may be even more effective than bans. A $0.05 fee on disposable bags generated a 42% decrease in plastic bag usage. In the United Kingdom, a 5p tax on single-use plastic bags (increased to 10p in 2021) led to a reduction in plastic waste.
Incentives for reusable bags
Some localities have created incentives for reusable bag use. For example, a study in Mountain View, California, included a minimum 10-cent fee on paper bags, leading to a 67% decline in their use.
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Plastic bag taxes
Plastic bags are a common source of pollution in our waters, threatening marine and freshwater ecosystems and the services they provide. They are also a type of single-use plastic that contributes to environmental pollution and harm to wildlife. As a result, they are often considered demerit goods due to their negative externalities. To address this issue, many countries, states, and cities have implemented plastic bag taxes to reduce plastic waste and encourage the use of reusable bags.
One of the first countries to introduce a plastic bag tax was Ireland in 2002, followed by Bangladesh, which implemented a regulatory ban. As of 2015, the United Kingdom introduced a 5p tax on single-use plastic bags, which increased to 10p in 2021. In the United States, Washington, D.C. was the first city to pass legislation on single-use plastic bag fees in 2009, with the money going towards environmental cleanup. Since then, over 100 states and localities in the US have adopted similar measures, with the fees often used to fund environmental clean-up or conservation efforts.
The effectiveness of plastic bag taxes in reducing plastic litter is still uncertain, but studies suggest that they can lead to a 25 to 47% decrease in plastic bags found during shoreline cleanups compared to areas without such policies. Additionally, taxes may further reduce plastic bag litter on shorelines. However, some environmentalists argue that bans are a more effective long-term solution to the plastic pollution problem, as they encourage the adoption of reusable bags and avoid single-use plastics altogether.
While plastic bag taxes are a step towards reducing plastic consumption, other measures are also necessary. Regulations on other single-use plastics and incentives for reusable bags can further decrease plastic pollution. Additionally, addressing the market failure of plastic bags, where consumers do not recycle them, is crucial. By implementing a combination of policies and promoting reusable alternatives, we can mitigate the negative impact of plastic bags on our environment.
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Frequently asked questions
Yes, plastic bags are demerit goods. They are socially undesirable and generate negative externalities.
Other examples of demerit goods include alcohol, tobacco, fast food, and gambling.
Plastic bags are a market failure because they cannot be recycled, reused, or reduced. They also cause environmental pollution and harm wildlife.
Governments can reduce the demand for demerit goods by implementing policies such as taxes on these goods or regulations on their consumption.
Consumers often do not realize the extent of harm caused by demerit goods, which leads to their overconsumption.
