Price and Output Decisions by a firm under Oligopoly

An oligopoly is a market structure characterized by a few large firms dominating the industry, producing either homogeneous or differentiated products. Each firm’s decisions on price and output affect the others, making firms interdependent. Barriers to entry prevent new competitors from entering easily. Examples include the automobile, steel, and telecom industries.

Nature of Price and Output Decisions:

In an oligopolistic market, the firm’s price and output decisions are influenced by:

1. Competitor reactions: Any change in price or output by one firm can trigger a response from others.

2. Market demand: Firms aim to maximize profit while considering industry demand.

Unlike perfect competition or monopoly, the firm cannot ignore rivals when setting price or output.

Pricing under Oligopoly:

Pricing in oligopoly is complex due to interdependence. Firms may adopt one of several strategies:

1. Kinked Demand Curve Theory

   • Proposed by Paul Sweezy.

   • Suggests that the firm faces a kinked demand curve:

     • Elastic above current price: if the firm raises price, competitors do not follow → large fall in demand.

     • Inelastic below current price: if the firm lowers price, competitors follow → small gain in demand.

   • This leads to price rigidity, where firms avoid changing prices frequently.

2. Price Leadership

   • A dominant firm sets the price, and smaller firms follow.

   • Helps avoid destructive price wars while maintaining profits.

Output Determination under Oligopoly:

The firm’s output is determined by the profit-maximizing condition:

MR = MC

• MR (Marginal Revenue) is derived from the market demand curve, considering competitor reactions.

• MC (Marginal Cost) is the cost of producing an additional unit.

Firms may limit output to maintain higher prices and maximize profits collectively or individually.

Short-Run Equilibrium:

In the short run:

• Firms can earn supernormal profits, especially if entry is restricted.

• Output decisions are based on market demand and competitor reactions.

• Price may remain stable due to kinked demand curve or tacit collusion.

Long-Run Equilibrium:

In the long run:

• Profits may persist due to barriers to entry.

• Oligopolistic firms may engage in collusion, cartels, or price leadership to maintain profitability.

• Unlike perfect competition, firms do not necessarily produce at minimum AC, leading to inefficiency.