AP Syllabus focus: ‘Governments use antitrust policy to make markets more competitive.’
Antitrust policy explains how governments preserve competition by limiting market power, blocking harmful mergers, and punishing collusion. It focuses on market performance: prices, output, innovation, and consumer welfare.
What antitrust policy is trying to fix
Markets can become less competitive when firms gain market power and can profitably raise price above competitive levels, restrict output, or reduce quality. Antitrust aims to move outcomes closer to competitive results by changing firm behavior or market structure.
Core idea: competition as a policy goal
Antitrust policy: Government enforcement of laws that promote competition by restricting anti-competitive conduct and limiting mergers or market structures that substantially reduce competition.
A more competitive market typically has:
Lower prices and higher quantities than monopoly-like outcomes
More pressure to innovate and cut costs
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FAQ
They assess which products are close substitutes and the geographic area where firms compete.
A narrower market definition usually implies higher concentration and stronger market power concerns.
Structural remedies change the market structure (e.g., divestitures, breakups).
Behavioural remedies restrict conduct (e.g., non-discrimination rules, banning exclusivity), often requiring monitoring.
Vertical mergers don’t directly remove a rival, but may enable foreclosure (blocking rivals’ access to inputs or customers).
Authorities focus on incentive and ability to foreclose, plus efficiency claims.
They offer reduced penalties to the first cartel member to provide evidence.
This raises distrust within cartels and increases the probability of detection, making collusion harder to sustain.
Legal standards, evidentiary burdens, and policy goals vary.
Some jurisdictions prioritise consumer prices; others weigh fairness, market openness, or strategic industries more heavily.
