The definition and sources of monopoly power

A monopoly exists when a single firm dominates a market, acting as the sole provider of a particular good or service. This structure gives the firm significant control over prices and market conditions.

Key features of a monopoly

• A monopoly occurs in a market with just one firm, which means that firm holds 100% of the market share and effectively is the entire industry.
• Firms with monopoly power can set prices independently, acting as price makers rather than price takers.
• Even in a monopoly, consumers retain the choice to purchase or not, and demand for the product remains sensitive to price changes—the higher the price, the lower the quantity demanded.

Sources of monopoly power

• Barriers to entry - High obstacles prevent new firms from joining the market and competing.
• Advertising and product differentiation - A firm can make its offerings seem more desirable, allowing it to influence prices.
• Limited number of competitors - Markets dominated by a few large firms often enable those businesses to exercise price-making abilities due to reduced rivalry.

Profit maximisation and inefficiencies in monopolies

Monopolies can achieve exceptional profits that persist over time, unlike in more competitive markets. However, this comes at the cost of certain economic efficiencies.

How monopolies maximise profits

Monopolies aim to maximise profits by producing at the output level where marginal cost (MC) equals marginal revenue (MR).

At this point:

• The average cost (AC) per unit is below the price charged, creating supernormal profits per unit.
• These supernormal profits continue into the long run because strong barriers to entry block new competitors from entering and eroding them.
• This position represents the long-run equilibrium for a monopolist, with no pressure to adjust due to lack of competition.

Inefficiencies associated with monopolies

Monopolies fail to achieve key forms of economic efficiency, leading to suboptimal resource allocation:

• Productive inefficiency - The firm does not produce at the lowest point on its AC curve, as MC does not equal AC at the profit-maximising output.
• Allocative inefficiency - The price set exceeds MC, resulting in products being overpriced relative to their production costs. This causes underconsumption.
• Deadweight welfare loss - Consumer surplus is transferred to the producer, and some potential economic value is lost entirely, as the restricted output prevents full market equilibrium from being reached.

Drawbacks and benefits of monopolies

While monopolies often face criticism for their market dominance, they can also offer advantages stemming from their size and stability.

Drawbacks of monopolies

• Lack of innovation - With no competitive pressure, firms may not innovate or respond to changing consumer preferences.
• Persistent inefficiency - There is little incentive to increase efficiency, allowing high levels of inefficiency to continue.
• Limited consumer choice - Without alternatives, buyers have fewer options.
• Exploitation of suppliers - Monopolists can use their power to negotiate unfairly low prices from suppliers.

Benefits of monopolies

• Economies of scale - The large scale of operations allows costs to be spread over high output volumes, keeping average costs low.
• Dynamic efficiency - Secure market positions enable firms to invest confidently in long-term product development, fostering innovation over time.
• Employment stability - Greater financial security can lead to more consistent job opportunities for workers.
• Role of intellectual property rights (IPRs) - Legal protections like patents and copyrights grant temporary monopolies, rewarding creativity by allowing supernormal profits for a limited period. This encourages firms to innovate, as without such safeguards, the risks of developing new ideas would deter investment.

Natural monopolies

Certain industries naturally tend towards monopoly due to their cost structures, where a single firm can serve the market more efficiently than multiple competitors.

Characteristics of natural monopolies

• Natural monopolies arise in sectors with very high fixed costs and significant economies of scale.
• If multiple firms operated, each would face the same high fixed costs, resulting in higher average costs per customer.
• The long-run average cost (LRAC) curve for a natural monopoly continually declines as output rises, making one large firm the most efficient option.
• A profit-maximising natural monopoly restricts output to where MC equals MR.

Government approaches to natural monopolies

• Governments often avoid breaking up natural monopolies to preserve efficiency gains from economies of scale.
• Instead, they may provide subsidies to encourage increased output to the point where average revenue (AR) equals MC.

The concept of monopsony

A monopsony is the opposite of a monopoly, occurring when there is only one buyer in a market, giving that buyer substantial influence over prices and terms.

Key features of a monopsony

• In a monopsony, the single buyer can act as a price maker, forcing suppliers to accept lower prices.
• This power may exploit suppliers, but could benefit end consumers if the savings are passed on.
• When a firm is the sole buyer of labour in a local market, it can use monopsony power to suppress wages.