Economics Lecture: Monopoly and Market Power

A set of vocabulary flashcards covering the economic principles of monopoly, market structures, cost curves, pricing strategies, antitrust regulation, and the role of intangible assets in the modern platform economy.

Monopoly

A market structure characterized by a single seller, no close substitutes for the product, significant barriers to entry, and price-making ability, where the single producer faces the entire market demand curve.

Pure Monopoly

An industry market structure in which a single firm is protected by complete barriers to entry and faces no competition in the marketplace.

Price Maker

A firm possessing substantial market power that sets its product's price by choosing the quantity it supplies, rather than accepting a price determined by the market.

Barriers to Entry

Obstacles such as economies of scale, patents, legal regulations, or high initial capital costs that make it difficult or impossible for new firms to enter a market.

Natural Monopoly

A market situation where a single firm can supply the entire market demand at a lower average total cost than multiple competing firms, typically due to significant economies of scale.

Legal Monopoly

A monopoly protected by law through government charters, patents, copyrights, licenses, or other state-imposed barriers to entry to ensure public order, quality, or social benefits.

Local Monopoly

A firm that acts as the sole provider of a good or service within a specific geographic area due to logistical constraints, high infrastructure costs, or low local demand.

Near Monopoly

A market structure where a single dominant company holds an overwhelming market share (often upwards of $70\%$ or more) and influences market conditions despite the presence of small or niche competitors.

Marginal Revenue ($MR$)

The additional revenue gained from selling one more unit of output; for a monopolist facing a downward-sloping demand curve, $MR < P$ because selling an additional unit requires lowering the price on all units sold.

Profit-Maximization Rule (Monopoly)

The operational rule where a monopoly chooses the output level where marginal revenue equals marginal cost ($MR = MC$), and then sets the highest price consumers are willing to pay for that quantity using the demand curve.

Allocative Efficiency

A condition where resources are allocated to produce the goods and services most desired by society, occurring where price equals marginal cost ($P = MC$).

Allocative Inefficiency

An inefficiency occurring in monopoly markets where price exceeds marginal cost ($P > MC$), causing output to be restricted below the socially optimal level and creating deadweight loss.

Productive Inefficiency

The failure of a firm to produce goods at the lowest point on its average total cost ($ATC$) curve.

Deadweight Loss

The loss of consumer and producer surplus resulting from underproduction when a monopoly restricts output below the competitive level to charge higher prices.

Socially Optimal Price ($P_r$)

The regulated price set where the demand curve intersects the marginal cost curve ($P = MC$), achieving allocative efficiency but potentially forcing the monopolist to incur economic losses.

Fair-Return Price ($P_f$)

The regulated price set where the demand curve intersects the average total cost curve ($P = ATC$), allowing the monopolist to cover all production costs and earn a normal profit without fully eliminating allocative inefficiency.

Minimum Efficient Scale (MES)

The lowest level of output at which a firm minimizes its average total cost ($ATC$).

Patent

A government-granted exclusive legal right that allows an inventor to make, use, or sell an invention for a duration of $20\text{ years}$ to encourage innovation by providing a temporary monopoly.

Copyright

A form of legal protection provided by the laws of the United States for original works of authorship, typically lasting for the life of the author plus $70\text{ years}$.

Trademark

An identifying symbol, name, or logo for a particular good or service that protects brand identity and helps consumers distinguish between different products.

Predatory Pricing

A strategic barrier to entry where an established firm temporarily lowers prices to drive out or discourage new competitors from entering the market.

Sherman Antitrust Act of 1890

Landmark U.S. legislation passed in $1890$ to promote fair competition and prevent monopolies by prohibiting contracts or conspiracies in restraint of trade (Section 1) and making monopolization illegal (Section 2).

Schumpeterian Monopoly

Temporary market power and economic rents achieved through innovation and technological progress, which are dynamically challenged and eventually eroded by creative destruction.

Network Effects

A market dynamic where the value or utility of a platform or product increases for all users as more individuals or businesses adopt and use it.

Platform Economy

An economic model where digital platform intermediaries coordinate interactions, transactions, and data collection between consumers and producers within a multi-sided ecosystem without necessarily owning the underlying physical assets.

Sunkness

A characteristic of intangible capital describing large, unrecoverable upfront investments in assets like research and development or proprietary software that create significant barriers to entry for competitors.

Scalability

A characteristic of intangible assets allowing a firm to expand its output globally and replicate products across devices or platforms at very low marginal cost while spreading fixed costs over a large user base.

Synergies

The enhanced value and operational efficiencies achieved when a firm integrates diverse resources, business units, or complementary technologies like combining artificial intelligence with Internet of Things systems.

Spillovers

External positive or negative effects generated by intangible investments that extend beyond the creator firm, such as open-source software accelerating industry-wide innovation or automation causing job displacement.