Market Types — Set 1

Correct Answer: C. Monopoly

• **Monopoly** = A monopoly exists when one enterprise is the sole supplier of a particular commodity with no close substitutes available. • **Single seller controls 100% of market** — Examples include Indian Railways (rail network) and OPEC nations in oil supply agreements. • 💡 Wrong-option analysis: Perfect Competition: this has many sellers and buyers with homogeneous products, the opposite of monopoly; Monopolistic Competition: this has many sellers with differentiated products, not a single seller; Oligopoly: this has a few large sellers, not just one.

Correct Answer: D. Duopoly

• **Duopoly** = A duopoly is a specific type of oligopoly where only two producers exist in one market. • **Exactly 2 sellers** — Classic examples include Pepsi vs Coca-Cola in some markets or Airbus vs Boeing in commercial aviation. • 💡 Wrong-option analysis: Perfect Competition: this has many sellers, not just two; Oligopoly: oligopoly includes duopoly but also covers markets with 3-10 firms, not strictly two; Monopsony: monopsony is a single-buyer market, not a two-seller structure.

Correct Answer: C. Perfect Competition

• **Perfect Competition** = Under perfect competition, firms are price takers because each individual firm is too small to influence the market price. • **Price determined by market, not firm** — With thousands of identical sellers, no single producer can raise the price above equilibrium without losing all customers. • 💡 Wrong-option analysis: Monopoly: a monopolist is a price maker, not a price taker; Oligopoly: oligopolists have some price-setting power due to interdependence and fewer competitors; Monopolistic Competition: firms have limited price-setting ability through product differentiation.

Correct Answer: B. Monopolistic Competition

• **Monopolistic Competition** = Monopolistic competition involves many firms selling products that are similar but not identical, known as product differentiation. • **Many sellers, differentiated products** — Examples include soap brands, restaurant chains, and clothing labels where branding creates perceived differences. • 💡 Wrong-option analysis: Monopsony: monopsony refers to a single buyer, not a market with product differentiation; Perfect Competition: products are perfectly homogeneous in perfect competition, with no differentiation; Monopoly: a monopoly has one seller and there is no differentiation since no substitutes exist.

Correct Answer: A. Oligopoly

• **Oligopoly** = The kinked demand curve theory was developed by Paul Sweezy to explain price rigidity in oligopolistic markets. • **Price rigidity in oligopoly** — The kink occurs because rivals match price cuts but not price increases, creating asymmetric demand responses. • 💡 Wrong-option analysis: Perfect Competition: demand is perfectly elastic (horizontal) in perfect competition; there is no kink; Duopoly: duopoly is a sub-type of oligopoly and can exhibit kinked demand but the theory is attributed to oligopoly broadly; Monopoly: a monopolist faces a smooth downward-sloping demand curve with no kink.

Correct Answer: B. Monopsony

• **Monopsony** = Monopsony occurs when a single buyer substantially controls the market as the major purchaser of goods and services. • **Single buyer dominates** — A classic example is a defence ministry being the only buyer of military weapons from private manufacturers. • 💡 Wrong-option analysis: Oligopsony: oligopsony has a few buyers, not just one single dominant buyer; Monopoly: monopoly refers to a single seller, not a single buyer; Perfect Competition: perfect competition has many buyers and many sellers, the opposite of monopsony.

Correct Answer: B. Oligopoly

• **Oligopoly** = In an oligopoly, the actions of one firm significantly affect the decisions and profits of its rivals, creating firm interdependence. • **Mutual interdependence among few firms** — When one firm cuts prices or launches an ad campaign, rivals must respond strategically to protect their market share. • 💡 Wrong-option analysis: Monopoly: with only one firm, there are no rivals to be interdependent with; Monopolistic Competition: with many small firms, each is too small to affect rivals significantly; Perfect Competition: with countless tiny firms, individual decisions have negligible impact on others.

Correct Answer: D. Oligopoly

• **Oligopoly** = An oligopoly consists of a few dominant firms that have high market share and influence over the industry. • **Few large firms dominate** — Examples include the automobile industry (Toyota, Ford, Volkswagen) and telecom (a few major carriers per country). • 💡 Wrong-option analysis: Monopoly: monopoly has only one firm, not a few; Perfect Competition: this has a very large number of small firms with no dominance; Monopolistic Competition: this has many firms, not just a few.

Correct Answer: B. Perfect Competition

• **Perfect Competition** = Perfect competition allows firms to freely enter or leave the industry without any legal, financial, or economic barriers. • **Free entry and exit** — This ensures that in the long run, economic profits attract new entrants and losses cause firms to exit, resulting in normal profits only. • 💡 Wrong-option analysis: Cartel: a cartel restricts entry through formal agreements among producers; Oligopoly: oligopoly has high barriers to entry due to large capital requirements or brand loyalty; Pure Monopoly: a pure monopoly maintains very high barriers to entry such as patents or government licenses.

Correct Answer: D. Oligopoly

• **Oligopoly** = A cartel is a formal agreement among independent producers in an oligopoly to coordinate output, fix prices, and reduce competition. • **OPEC is the world's most famous cartel** — Formed in 1960, OPEC coordinates oil production among member nations to influence global oil prices. • 💡 Wrong-option analysis: Monopsony: monopsony is about buyer power, not seller agreements; Perfect Competition: in perfect competition, price is set by the market and firms cannot collude to fix prices; Monopolistic Competition: with many small firms, cartel formation is impractical.