# Monopoly **The model:** A market with one seller — and, by extension, the *condition of unchallenged market power*: the ability to set prices, exclude rivals, and extract surplus without the discipline of competition. The monopolist restricts output to raise price, converting consumer surplus into profit and deadweight loss; the deeper harms are dynamic — throttled innovation, dependent suppliers, and power that leaks from market into polity. ## The Mechanism Monopoly arises by grant (patents, franchises, the old royal charters), by nature (network effects and scale economies that make one winner efficient), or by conduct (predation, exclusive dealing, serial acquisition of nascent rivals). It defends itself with moats — switching costs, data advantages, regulatory complexity that only incumbents can afford — and its end-state is political: market power purchases rule-making power, which entrenches market power ([[Regulatory Capture]] closes the loop). The antitrust tradition ([[Sherman Antitrust Act]], [[Standard Oil]]) exists because the founders of that tradition understood monopoly as a *governance* problem, not just a pricing problem. ## KB Applications ### Platform monopoly and political power The vault's tech files document the contemporary case: gatekeeping platforms whose moderation, ranking, and pricing choices are de facto public policy — and whose owners transact directly with the state. [[Monopoly as Doctrine]] (Concepts) holds the Thiel-side ideology — "competition is for losers" — where monopoly is not market failure but the entrepreneurial *goal*; this page holds the neutral economics that doctrine weaponizes. ### The Brandeis revival and its enemies The 2020s antitrust revival (structural presumptions, breakup talk) and the 2025–26 counter-swing (enforcement retreat, consent-decree unwinding) map the live battle; Countervailing Power and Cartel are the adjacent structures. Concentration metrics belong in the vault's econ-indicator layer. ## See Also - Oligopoly — few sellers, subtler power - [[Network Effects]] — the modern moat - Countervailing Power — Galbraith's answer