EU competition law is one of the most influential regulatory systems in the world. Built on the foundations of the internal market, it aims to preserve effective competition, protect consumer welfare, and prevent distortions that undermine the functioning of cross-border trade.
For students, researchers, and practitioners, mastering the core concepts is essential. This guide breaks down the pillars of EU competition law with clarity and doctrinal precision.
Market Definition and Market Power
Before assessing any conduct, the EU institutions ask: what is the relevant market?
Why it matters
- Determines whether a firm has market power or dominance
- Frames the competitive constraints acting on firms
- Influences the analysis under Article 101 https://eur-lex.europa.eu/eli/treaty/tfeu_2008/art_101/oj/eng and 102 TFEU https://eur-lex.europa.eu/eli/treaty/tfeu_2008/art_102/oj/eng
Key components
- Product market: Are products interchangeable from the consumer’s perspective?
- Geographic market: Where do competitive conditions apply uniformly?
- SSNIP test: Would a hypothetical monopolist profitably raise prices by 5-10%
The Commission’s Market Definition Notice guides this analysis and remains central to enforcement.
Anti-Competitive Agreements – Article 101 TFEU
Article 101 prohibits agreements and concerted practices that restrict competition.
What counts as an agreement?
- Formal contracts
- Informal understandings
- Concerted practices ( coordination without explicit agreement)
Hardcore restrictions
These are presumed unlawful:
- Price-fixing
- Market sharing
- Output limitation
- Bid-rigging
Exemptions under Article 101(3)
An agreement may be exempt if it:
- Improves production or distribution
- Promotes technical or economic progress
- Gives consumers a fair share of the benefits
- Imposes no unnecessary restrictions
Vertical agreements often benefit from block exemptions, reflecting their generally pro-competitive nature.
Abuse of Dominance – Article 102 TFEU
Dominance is not prohibited. Abuse is.
What is dominance?
A position of economic strength enabling a firm to behave independently of competitors and consumers. Indicators include:
- High marker share (often 40%+)
- Barriers to entry
- Weak countervailing buyer power
Types of abuse
Exclusionary abuses
- Predatory pricing
- Loyalty rebated
- Margin squeeze
- Refusal to supply
- Tying and bundling
Exploitative abuses
- Excessive pricing
- Unfair trading conditions
The EU increasingly applies an effects-based approach, especially in digital markets where data and network effects shape market power.
Merger Control and Concentrations
EU merger control prevents concentrations that would significantly impede effective competition (the SIEC test).
Key questions
- Will the merger reduce competitive pressure?
- Will it create or strengthen a dominant position?
- Does it risk coordinated effects (tacit collusion)?
The Commission also scrutinises killer acquisitions, particularly in tech and pharma, where incumbents may acquire innovative start-ups to neutralise future competition.
State Aid Control – Distinctive EU Feature
Unlike most competition regimes, the EU directly regulates state subsidies.
What constitutes state aid?
- State resources
- Selective advantage
- Distortion of competition
- Effect on trade between Member States
State aid control ensures that governments do not undermine the internal market by favouring national champions. Post-Brexit, the UK’s subsidy control regime mirrors many of these principles.
Digital Markets and the New Regulatory Landscape
The digital economy has prompted a shift from reactive enforcement to ex ante regulation.
Key developments
- Digital Markets ACT (DMA): Obligations for “gatekeepers” (e.g., interoperability, data access, self-preferencing bans) https://eur-lex.europa.eu/eli/reg/2022/1925/oj/eng
- Platform power: Network effects, data accumulation, and ecosystem lock-in
- Algorithmic collusion: Risks of automated coordination
This marks a new era where competition law and digital regulation operate side by side.
Enforcement, Remedies, and Private Actions
Who enforces EU competition law?
- European Commission (DG COMP)
- National Competition Authorities (NCAs) under Regulation 1/2003 https://eur-lex.europa.eu/eli/reg/2003/1/oj/eng
- EU and national courts
Available remedies
- Fines
- Behavioural commitments
- Structural remedies (e.g., divestitures)
- Damages actions by consumers and competitors
Private enforcement has grown significantly since the Damages Directive https://eur-lex.europa.eu/eli/dir/2014/104/oj/eng making competition law a hybrid public-private system.
Conclusion
EU competition law is built on a coherent set of principles: protecting the competitive process, preventing distortions, and ensuring that markets remain open and dynamic. Understanding market definition, anti-competitive agreements, dominance, mergers, state aid, and digital regulation provides a strong foundation for deeper study and practical application.
If you’re building expertise in EU law these concepts form the backbone of everything else.
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