market dominance

What is Efficiency?

In economics, efficiency means producing goods or services with the least possible cost and waste. Think of it like a well‑organized classroom where every student gets the right resources at the right time.

Two key types:

• Allocative Efficiency: Resources are used where they’re most valued. Example: A bakery that sells only the pastries people love.
• Productive Efficiency: Goods are produced at the lowest possible cost. Example: A factory that uses the best machines to make cars cheaply.

When Does Market Failure Occur?

Market failure happens when the market, on its own, does not allocate resources efficiently. Common causes:

1. Externalities: Costs or benefits that affect third parties. Example: A factory that pollutes a river.
2. Public Goods: Non‑excludable and non‑rivalrous. Example: Street lighting.
3. Information Asymmetry: One party knows more than the other. Example: A used‑car salesman hiding defects.
4. Market Power: One firm dominates and can influence prices. Example: A telecom company that owns all the towers in a city.

What is Market Dominance?

A firm is considered dominant when it controls a large share of the market, usually >50%, and can influence prices or exclude competitors.

Analogy: Imagine a giant ice‑cream shop that sells most of the ice‑cream in town. If it raises prices, everyone pays more.

How Does Dominance Lead to Market Failure?

Dominant firms can:

• Set higher prices than competitive markets would.
• Limit output to keep prices high.
• Use predatory pricing to drive rivals out.
• Restrict innovation by controlling technology or patents.

Result: Consumers pay more, less choice, and overall welfare decreases.

1. Define key terms clearly. Use the definition + example format.

2. Use diagrams. Even simple sketches (drawn with table or ul) can illustrate market structures.

3. Explain the link between dominance and welfare. Show how price increases reduce consumer surplus.

4. Discuss policy responses. Antitrust laws, price caps, and subsidies.

5. Practice with past exam questions. Look for “market failure” and “dominant firm” prompts.

Good luck! Remember: Understanding the cause and effect of market dominance is key to answering any question on this topic.