Economics · Year 13

Active learning ideas

Market Failure: Public Goods and Information Asymmetry

Active learning works because students need to see firsthand how non-excludability and non-rivalry create incentives to free-ride. When they experience the tension between individual rationality and collective outcomes, the logic of market failure becomes concrete rather than abstract.

• National Curriculum Attainment Targets
• A-Level: Economics - Market Failure
• A-Level: Economics - Public Goods and Information Asymmetry

• 25–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Simulation Game
• 35 min · Small Groups

Simulation Game: Free-Rider Contribution Game

Divide class into groups representing citizens funding a public good like a park bench. Each student secretly decides contribution amount from tokens. Tally totals, reveal free-riders, then repeat rounds with discussion on outcomes. Groups debrief on why provision fails.

Differentiate between public goods and private goods, providing relevant examples.

Facilitation Tip

During the Free-Rider Contribution Game, start with a small group size before expanding to 20 students to let the underprovision pattern emerge naturally.

What to look for

Provide students with three scenarios: 1) a national park, 2) a private tutoring service, and 3) a person buying a used laptop online. Ask students to classify each as a public good, private good, or neither, and briefly explain their reasoning for one of the public goods or information asymmetry examples.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 02

• Document Mystery
• 40 min · Pairs

Role-Play: Lemons Market Bargain

Pairs act as buyer and seller in a used car market; one holds 'defect cards' unknown to buyer. Buyers negotiate prices based on info cues. Switch roles, then class analyzes adverse selection patterns from recorded deals.

Explain how information asymmetry can lead to adverse selection and moral hazard.

Facilitation Tip

For the Lemons Market Bargain, assign half the class as buyers and half as sellers, then rotate roles so students feel the squeeze of adverse selection.

What to look for

Pose the question: 'Should the government always intervene to provide public goods or regulate markets with information asymmetry?' Facilitate a debate where students must use economic concepts like market failure, externalities, and efficiency to support their arguments, referencing specific examples discussed in class.

• Analyze
• Evaluate
• Self-Management
• Decision-Making

Activity 03

• Formal Debate
• 45 min · Small Groups

Formal Debate: Government Provision Stations

Set up stations for public goods examples like lighthouses or flood defences. Small groups prepare arguments for market, government, or hybrid provision, rotate to counter others. Whole class votes and evaluates strongest cases.

Assess the role of government in providing public goods and regulating information markets.

Facilitation Tip

Set up three stations for Government Provision Debates with lockable prompts so rotating groups debate the same issue with fresh angles.

What to look for

Present students with definitions of adverse selection and moral hazard. Ask them to write one original example for each, clearly identifying the two parties involved and the information imbalance or behavioral change that creates the market failure.

• Analyze
• Evaluate
• Create
• Self-Management
• Decision-Making

Activity 04

• Document Mystery
• 25 min · Individual

Scenario Sort: Moral Hazard Cards

Provide cards with real-world scenarios like car insurance claims. Individuals sort into moral hazard or other failures, justify choices in pairs. Class shares and refines categorizations with economic theory.

Differentiate between public goods and private goods, providing relevant examples.

Facilitation Tip

To reduce noise in the Moral Hazard Cards sort, have students work in pairs to justify each placement before revealing the class consensus.

What to look for

Provide students with three scenarios: 1) a national park, 2) a private tutoring service, and 3) a person buying a used laptop online. Ask students to classify each as a public good, private good, or neither, and briefly explain their reasoning for one of the public goods or information asymmetry examples.

• Analyze
• Evaluate
• Self-Management
• Decision-Making

A few notes on teaching this unit

Teachers should begin with a quick real-world audit: ask students to name goods they use daily and classify them. This reveals that most goods are private, not public, and sets up the overgeneralization problem you’ll address later. Avoid rushing to theory; let students trace the logic from incentives to outcomes using familiar examples. Research shows that when students generate examples themselves, they retain the concept longer, so build in time for personal connection to the material.

Successful learning looks like students distinguishing public from private goods with precision and explaining why information asymmetry leads to inefficiencies in real markets. They should connect simulations and role-plays to policy debates with clear economic reasoning.

---

Watch Out for These Misconceptions

• During the Government Provision Stations debate, watch for students assuming everything provided by government is a public good.

  During the Government Provision Stations debate, hand each group a mix of goods and ask them to sort into public, private, or club goods. After they present, show a table of government revenues by service type to show that many are private goods.

• During the Free-Rider Contribution Game, watch for students believing appeals to ethics will solve the problem.

  During the Free-Rider Contribution Game, record total contributions after each round and display the data. Ask students to explain why total donations fall despite repeated ethical appeals and connect this to the free-rider problem.

• During the Lemons Market Bargain, watch for students thinking information asymmetry only harms buyers.

  During the Lemons Market Bargain, after the first round, have students switch to the seller side for one round and calculate their average profit. Discuss whether sellers also lose when buyers exit the market, using their profit data as evidence.

---

Methods used in this brief

• Simulation Game
• Document Mystery
• Formal Debate