Chapter 11: Public Goods and Common Resources
Chapter Overview
This chapter discusses the implications of excludability and rivalry on the market for goods. It categorizes goods and explains related concepts such as the free-rider problem, the tragedy of the commons, and the role of property rights.
Chapter Objectives
By the end of this chapter, you should be able to:
Examine the implications of excludability and rivalry on the market for a good.
Identify a good as either a public good, private good, common resource, or club good in a given scenario.
Determine whether a good is excludable in consumption and rival in consumption.
Explain the free-rider problem, providing an example of a public good.
Discuss why private firms find it unprofitable to produce public goods.
Identify problems associated with using cost-benefit analysis for optimizing the quantity of a public good.
Explain consumer behavior in relation to common resources, leading to overuse and the tragedy of the commons.
Articulate the role of property rights in achieving market efficiency.
Types of Goods
Characteristics of Goods
Excludability: A property of a good where a person can be prevented from using it.
Rivalry in Consumption: A property of a good whereby one person's use of the good diminishes the ability of others to use it.
Types of Goods
Private Goods: Goods that are both excludable and rival in consumption.
Public Goods: Goods that are not excludable and not rival in consumption.
Common Resources: Goods that are rival in consumption but not excludable.
Club Goods: Goods that are excludable but not rival in consumption.
Visual Representation
A diagram can categorize goods according to the characteristics of excludability and rivalry, providing examples for each category.
Active Learning: Categorizing Roads
The classification of a road as one of the four types depends on its congestion status and whether it is a toll road.
Possible classifications include:
Uncongested Non-Toll Road: Public good
Uncongested Toll Road: Club good
Congested Non-Toll Road: Common resource
Congested Toll Road: Private good
The Free-Rider Problem
Definition
Free Rider: An individual who benefits from a good without paying for it.
Explanation
The free-rider problem arises because public goods are not excludable. This results in market failure, as private markets cannot provide these goods efficiently.
Government Intervention
The government can alleviate the free-rider problem by:
Providing the public good if the total benefits exceed the costs.
Funding public goods through tax revenue, thus making everyone better off.
Challenges arise in measuring the benefits of such goods.
Important Public Goods
Examples of significant public goods include:
National Defense: A widely accepted public good essential for security but can be expensive to produce.
Basic Research: Often subsidized by the government; measuring benefits is complex, which affects decision-making.
Fighting Poverty: Programs such as:
TANF (Temporary Assistance for Needy Families): Provides temporary income support.
SNAP (Supplemental Nutrition Assistance Program): Assists in food purchases for low-income individuals.
EITC (Earned Income Tax Credit): Offers tax rebates to low-wage workers.
Cost-Benefit Analysis of Public Goods
Definition
Cost-Benefit Analysis: A study comparing costs and benefits to society from providing a public good, often yielding rough approximations since there are no price signals.
Government Responsibility
The government must determine the types and quantities of public goods to provide, ensuring they meet societal needs efficiently.
Active Learning: Building a Fountain
Scenario
A community values a fountain at $100 per person (200 people total) but falls short in fundraising for its $7,000 construction cost.
Should the Fountain Be Built?
Total perceived value: $20,000 (200 x $100) exceeds cost ($7,000).
Issue: The free-rider problem prevents adequate contributions, limiting the ability to build the fountain.
Government Involvement
The government could levy a tax of $35 per person to fund the fountain construction.
Common Resources
The Tragedy of the Commons
Definition
Tragedy of the Commons: A parable illustrating overuse of common resources, leading to depletion and societal detriment.
Example
Illustrated through a medieval town where overgrazing leads to degradation of shared land.
Incentive Misalignment
Private incentives, such as utilizing shared land for free, overshadow social incentives, resulting in negative externalities like overgrazing.
Individuals tend to neglect the external costs from their actions, leading to resource depletion.
Solutions to the Tragedy
Possible solutions include:
Regulating the number of sheep each family may possess.
Internalizing the externality through taxes.
Implementing a system for trading sheep-grazing permits.
Establishing private property by dividing consensus land among families.
Important Common Resources
Clean Air and Water: Addressing pollution through regulations and corrective taxes is important.
Congested Roads: Implementing corrective taxes like tolls can mitigate congestion issues.
Wildlife: Effective management requires international cooperation, fishing licenses, and regulations to sustain populations.
Active Learning: Social Media
Examining social media as a common resource highlights potential externalities and encourages discussion on regulation by providers depending on users' behaviors.
Conclusion: Property Rights and Government Action
The failure to allocate resources efficiently often occurs when property rights are weak or absent. Government intervention can be crucial in defining property rights, regulating private behavior, and funding goods that the market fails to provide.
Final Reflections
A self-assessment can be undertaken on personal use of common resources, evaluating whether government intervention is necessary for sustainable usage.
Chapter 11: Public Goods and Common Resources
Chapter Overview
This chapter discusses the implications of excludability (whether individuals can be prevented from consuming a good) and rivalry (whether one person's consumption diminishes another's) on the market for goods. It categorizes goods based on these characteristics and explains related concepts such as the free-rider problem (associated with public goods due to non-excludability), the tragedy of the commons (associated with common resources due to rivalry without excludability), and the crucial role of property rights in achieving market efficiency and preventing resource depletion.
Chapter Objectives
By the end of this chapter, you should be able to:
Examine the implications of excludability and rivalry on the market for a good.
Identify a good as either a public good, private good, common resource, or club good in a given scenario.
Determine whether a good is excludable in consumption and rival in consumption.
Explain the free-rider problem, providing an example of a public good.
Discuss why private firms find it unprofitable to produce public goods.
Identify problems associated with using cost-benefit analysis for optimizing the quantity of a public good.
Explain consumer behavior in relation to common resources, leading to overuse and the tragedy of the commons.
Articulate the role of property rights in achieving market efficiency.
Types of Goods
Characteristics of Goods
Excludability: A property of a good where a person can be prevented from using it. This prevention can be based on price (e.g., if a person cannot afford it), legal restrictions, or technological barriers. For example, a firm can prevent someone from watching a movie by not selling them a ticket.
Rivalry in Consumption: A property of a good whereby one person's use of the good diminishes the ability of others to use it. This means that the quantity of the good is finite, and consumption by one individual directly subtracts from the amount available for others. For instance, if one person eats an apple, another person cannot eat that same apple.
Types of Goods
Private Goods: Goods that are both excludable and rival in consumption. Examples include most everyday items like a slice of pizza, a pair of shoes, or a specific seat at a concert. A seller can prevent someone from consuming the good (excludable), and one person's consumption means no one else can consume that exact unit (rival).
Public Goods: Goods that are not excludable and not rival in consumption. These goods are difficult or impossible for private sellers to charge for, and one person's enjoyment of the good does not reduce its availability to others. Examples include national defense, basic scientific knowledge, public parks with free access, or a lighthouse beacon.
Common Resources: Goods that are rival in consumption but not excludable. These resources are available for everyone's use, but their quantity is finite, leading to potential depletion if overused. It is difficult to prevent people from using them once they exist. Examples include fish in the ocean, clean air and water, or uncongested public roads that become congested during peak hours.
Club Goods: Goods that are excludable but not rival in consumption. These goods typically have a high fixed cost but a low marginal cost for additional users, and it is possible to restrict access. Examples include cable TV subscriptions, private golf courses, uncrowded toll roads, or a software license.
Visual Representation
A diagram can effectively categorize goods according to the characteristics of excludability (on one axis) and rivalry (on the other axis), providing clear examples for each of the four categories, thereby offering a comprehensive understanding of how these characteristics define different types of goods.
Active Learning: Categorizing Roads
The classification of a road as one of the four types depends critically on its congestion status and whether it is a toll road (implying excludability).
Possible classifications include:
Uncongested Non-Toll Road: Public good (not excludable, and one person's use does not diminish another's use if it's uncongested).
Uncongested Toll Road: Club good (excludable by toll, but not rival as long as it's uncongested).
Congested Non-Toll Road: Common resource (not excludable, but rival once congestion makes one person's use diminish another's).
Congested Toll Road: Private good (excludable by toll, and rival due to congestion).
The Free-Rider Problem
Definition
Free Rider: An individual who receives the benefit of a good or service without paying for it, typically because the good is non-excludable.
Explanation
The free-rider problem arises inherently because public goods are not excludable. Since people cannot be prevented from enjoying the benefits of a public good even if they don't pay for it, there's little incentive for individuals to voluntarily contribute towards its provision. This leads to market failure, as private firms find it unprofitable to produce public goods because they cannot easily charge all beneficiaries. Consequently, the private market will under-provide or fail to provide these goods even if the total societal benefit outweighs the cost.
Government Intervention
The government can alleviate the free-rider problem by:
Directly providing the public good if a careful cost-benefit analysis demonstrates that the total benefits to society exceed the total costs of provision. This ensures the good is supplied to an optimal level.
Funding public goods through tax revenue, thereby making everyone contribute to the cost. With the coercive power of taxation, the government can overcome the individual incentive to free-ride, theoretically making everyone better off by collectively financing valuable public goods.
Challenges arise, however, in accurately measuring the true societal benefits of such goods, as there are no market prices to signal consumer preferences.
Important Public Goods
Examples of significant public goods that highlight the need for government intervention include:
National Defense: This is a classic example of a public good. It is non-excludable because once deployed, it protects everyone in the nation; you cannot defend some citizens and not others. It is also non-rival because one person's security does not diminish another's access to that same protection. Due to the massive scale and free-rider problem, private entities would never be able to provide adequate national defense.
Basic Research: Knowledge is generally non-rival (one person using a piece of knowledge doesn't stop another) and often non-excludable once disseminated. Basic research, unlike applied research that might lead to patentable products, generates fundamental knowledge that benefits society broadly. Consequently, it is often subsidized or directly conducted by the government to ensure its production, despite the complexity of measuring its long-term benefits.
Fighting Poverty: While potentially debated, some aspects of poverty alleviation can be seen as public goods because reducing poverty benefits society as a whole through reduced crime, better public health, and greater social stability. Government programs designed to fight poverty include:
TANF (Temporary Assistance for Needy Families): Provides temporary financial assistance and work opportunities to needy families.
SNAP (Supplemental Nutrition Assistance Program): Formerly food stamps, this program assists low-income individuals and families with food purchases, improving nutrition and food security.
EITC (Earned Income Tax Credit): A refundable tax credit for low-to moderate-income working individuals and families, aiming to offset regressive taxes and encourage work.
Cost-Benefit Analysis of Public Goods
Definition
Cost-Benefit Analysis: A systematic process of comparing the estimated costs of a project or policy against its projected benefits to society. For public goods, this analysis is particularly crucial because, in the absence of market prices, it is often the only way governments can attempt to determine the optimal quantity to provide. These analyses often yield only rough approximations because assigning monetary values to non-market benefits (like a clean environment or national security) and costs (like the opportunity cost of tax revenue) is inherently challenging.
Government Responsibility
The government bears the significant responsibility of carefully determining which types and quantities of public goods to provide. This decision-making process requires a thorough evaluation to ensure that public goods effectively meet societal needs without excessive waste, balancing diverse public interests and optimizing resource allocation.
Active Learning: Building a Fountain
Scenario
Imagine a community where each of 200 residents values a new public fountain at 100. The total perceived value to the community is 200 \times \$100 = \$20,000. However, if the construction cost of the fountain is 7,000, and contributions are voluntary, the community often falls short in fundraising.
Should the Fountain Be Built?
From a societal perspective, the total perceived value of 20,000 clearly exceeds the total cost of 7,000. Thus, building the fountain would be economically efficient and increase overall welfare.
The core issue here is the free-rider problem: since individuals know they can enjoy the fountain whether or not they contribute, many will choose not to pay, expecting others to cover the cost. This prevents adequate voluntary contributions, limiting the ability to build the fountain even when it's collectively desired.
Government Involvement
To overcome the free-rider problem and achieve the socially optimal outcome, the government could intervene. For instance, it might levy a mandatory tax of 35 per person (7,000 / 200 individuals = \$35 per person) to fund the fountain construction. This ensures everyone contributes and the valuable public good is provided.
Common Resources
The Tragedy of the Commons
Definition
Tragedy of the Commons: A compelling parable that illustrates the phenomenon of overuse and degradation of shared resources when individual users act independently according to their own self-interest, contrary to the common good of all users. This often leads to depletion or ruin of the common resource.
Example
This concept is often illustrated through a medieval town with a shared grazing pasture (the
Chapter 11: Public Goods and Common Resources
Key Terms and Definitions
Excludability: A property of a good where a person can be prevented from using it. This prevention can be based on price (e.g., if a person cannot afford it), legal restrictions, or technological barriers.
Rivalry in Consumption: A property of a good whereby one person's use of the good diminishes the ability of others to use it. This means that the quantity of the good is finite, and consumption by one individual directly subtracts from the amount available for others.
Private Goods: Goods that are both excludable and rival in consumption.
Public Goods: Goods that are not excludable and not rival in consumption.
Common Resources: Goods that are rival in consumption but not excludable.
Club Goods: Goods that are excludable but not rival in consumption.
Free Rider: An individual who receives the benefit of a good or service without paying for it, typically because the good is non-excludable.
Cost-Benefit Analysis: A systematic process of comparing the estimated costs of a project or policy against its projected benefits to society. For public goods, this analysis is particularly crucial because, in the absence of market prices, it is often the only way governments can attempt to determine the optimal quantity to provide.
Tragedy of the Commons: A compelling parable that illustrates the phenomenon of overuse and degradation of shared resources when individual users act independently according to their own self-interest, contrary to the common good of all users. This often leads to depletion or ruin of the common resource.
In business and economics, the relationship between a firm’s total revenue, total cost, and profit is fundamental:
Total Revenue (TR): This is the total amount of money a firm receives from the sale of its goods or services. It is calculated by multiplying the price of the good or service by the quantity sold. (TR = P imes Q)
Total Cost (TC): This represents the sum of all expenses incurred by the firm in producing its output. It includes both fixed costs (costs that do not vary with the level of output, like rent) and variable costs (costs that change with the level of output, like raw materials or labor).
Profit (\Pi): Profit is the financial gain, or the difference, between a firm's total revenue and its total cost. If total revenue exceeds total cost, the firm makes a profit. If total cost exceeds total revenue, the firm incurs a loss.
Therefore, the relationship is expressed by the formula: \Pi = TR - TC