What is Monopoly?
A monopoly is a market structure where a single firm is the sole seller of a product with no close substitutes. The monopolist faces no rival sellers and has significant market power to set prices. High barriers to entry prevent competitors from entering the market and challenging the monopoly.
A monopoly is a market with one dominant firm, no close substitutes, and high barriers to entry — the monopolist is a price maker with control over price and quantity.
Step-by-step worked examples
A utility company is the sole provider of electricity in a region with a government license. Monopoly?
Yes — one seller (firm), no close substitutes (electricity), government license = high barrier to entry. Monopoly.
Pharmaceuticals: firm holds a patent on a drug. Can competitors enter?
During patent term: no — patent is a high barrier. Monopoly profits possible. After expiry: generics enter, profits fall.
Railroad was sole transporter in a region. Is that a monopoly?
Yes — one firm, high capital/scale barriers, no close substitutes. Historical railroad monopolies common.
Flashcards
Quick quiz
Q1.A monopoly can maintain above-normal profit because…
Q2.Example of a modern monopoly:
Q3.Monopolist's pricing strategy compared to perfect competition:
Q4.What barrier to entry is created by a patent?
The full card deck, worked steps and AI-tutor support for “What is Monopoly?” are in Notek — study by hand before your exam.
Common mistakes
Confusing monopoly with high prices. — Correct: Monopoly = one seller + barriers; high prices are a consequence, not the definition.
Thinking all monopolies are evil. — Correct: Some monopolies (patents, utilities) serve public interest; context matters.
Assuming monopoly profit is infinite. — Correct: Monopoly profit is limited by demand elasticity and marginal cost.
Ignoring barriers to entry. — Correct: Barriers are essential; without them, new firms enter and competition increases.
FAQ
What is a monopoly?
A market with one dominant firm, no close substitutes, and high barriers to entry — the monopolist is a price maker.
Why does monopoly charge higher price than competition?
Monopolist faces downward-sloping demand and restricts quantity to maximize profit.
What creates barriers to entry?
Patents, economies of scale, exclusive licenses, control of scarce resources, brand loyalty, network effects.
Is monopoly efficient?
Generally not — restricts output and charges high prices, creating deadweight loss and consumer harm.