Competition Policy & Government Intervention
The CMA, merger control, price regulation, privatisation vs nationalisation, deregulation, regulatory capture, and the limits of government intervention in markets
SPEC 3.6 • GOVERNMENT INTERVENTION
The CMA — UK Competition Regulator
Competition and Markets Authority (CMA)
The UK's primary competition regulator, responsible for promoting competition for the benefit of consumers. It investigates anti-competitive behaviour, reviews mergers, and can impose remedies.
CMA Powers
Investigating cartels and collusion — fines up to 10% of global turnover
Reviewing mergers that may substantially lessen competition
Ordering break-ups of dominant firms (structural remedies)
Imposing behavioural remedies — restrictions on conduct without restructuring
Market studies — investigating entire sectors where competition appears weak
Merger Policy
When Does the CMA Review a Merger?
A merger is reviewed if either:
Combined market share exceeds 25%, OR
UK turnover exceeds £70 million
Three Possible Outcomes
OutcomeWhenApproveMerger does not substantially lessen competitionApprove with conditionsCompetition concerns addressed by selling off part of the business or behavioural commitmentsBlockMerger would substantially lessen competition and no remedies would address concerns
Exam Tip
The CMA applies a "substantial lessening of competition" (SLC) test. In an essay, always state this test by name — it shows the examiner you know the framework, not just the concept.
Regulation of Natural Monopoly
Natural monopolies (water, gas, electricity, rail) cannot be broken up — splitting them would raise average costs. Instead, the government regulates them using sector-specific regulators.
UK Sector Regulators
RegulatorSectorOfwatWaterOfgemEnergyOfcomTelecoms & broadcastingORRRailFCAFinancial services
RPI-X Price Caps
RPI-X (or CPI-X) Price Cap
The regulated firm can raise prices by no more than inflation minus X%, where X is an efficiency factor set by the regulator. Forces the firm to improve productivity or absorb cost increases.
Example: If RPI = 4% and X = 2%, the firm can raise prices by a maximum of 2%. To maintain profit, it must find at least 2% efficiency gains.
Advantages of RPI-X
Incentivises cost reduction — firm keeps profits from exceeding X
Protects consumers from monopoly pricing
Simple to understand and administer
Mimics competitive pressure
Disadvantages of RPI-X
Setting X correctly requires information the regulator may lack (asymmetric information)
If X too low → consumers still exploited
If X too high → firm underinvests in quality/maintenance
Risk of regulatory capture
Privatisation vs Nationalisation
Case FOR Privatisation
Profit motive drives efficiency — reduces X-inefficiency
Private capital funds investment without public borrowing
Removes political interference from commercial decisions
Innovation incentivised by competition
Examples: BT (1984), British Gas (1986), water companies (1989), rail (1994–97)
Case FOR Nationalisation
Essential services should not be run for profit
Long-term investment horizon — no shareholder pressure for short-term returns
Prevents monopoly exploitation of consumers
Captures EoS for public benefit
Counter-arguments: political interference, X-inefficiency, fiscal cost, government failure risk
Exam Tip
This debate is a high-probability essay angle. The best answers evaluate whether the specific market is a natural monopoly — if yes, nationalisation or heavy regulation is stronger; if no, privatisation with competition is more likely to work.
Deregulation & Promoting Competition
Deregulation
Removing barriers to entry imposed by government — licensing requirements, planning restrictions, regulatory burdens — to increase competition in a market.
Tools for Promoting Competition
Deregulation — removing legal/administrative barriers to entry (e.g. Big Bang in financial services, 1986)
Competitive tendering — requiring public contracts to be put out to competitive bid
Promoting small business — tax relief, grants, enterprise zones
Trade liberalisation — reducing tariffs/quotas increases international competition
Deregulation
Lower barriers to entry
More firms enter
↑ competition
↓ prices, ↑ efficiency, ↑ choice
Limits to Intervention — Regulatory Capture
Regulatory Capture
When the regulator becomes dominated by the interests of the industry it is supposed to regulate — regulation ends up serving producer interests rather than consumer interests.
How Regulatory Capture Happens
Information asymmetry — the regulator relies on the industry for data about costs and efficiency
Revolving door — regulators move into well-paid industry jobs after leaving their post
Lobbying — firms spend resources influencing regulatory decisions
Technical complexity — industries like energy and finance are so complex that regulators defer to industry expertise
Example: Ofgem's oversight of energy companies has been criticised for being too close to the industry — energy firms earned high profits while consumer bills rose sharply.
Limits to Intervention — Asymmetric Information & Government Failure
Asymmetric Information
Government lacks the detailed knowledge that private firms possess about costs, demand, and efficiency. This makes it difficult to set optimal prices, assess performance targets, or determine the right level of X in RPI-X regulation.
Four Causes of Government Failure
Unintended consequences — policies create new distortions (e.g. price caps may deter investment)
Excessive administrative costs — cost of regulation may exceed the welfare gain
Information gaps — government doesn't know the true size of the market failure or the optimal intervention level
Regulatory capture — regulator serves producer rather than consumer interests
The Key Evaluation
The question is never simply "should the government intervene?" It's: is intervention likely to result in a net welfare gain or loss? Weigh the size of the market failure against the risk of government failure. This is the core AO4 framework.
AO4 Evaluation Toolkit
Evaluative ArgumentDevelopment
Regulatory captureEven regulated monopolies may exploit consumers if the regulator is captured. Effectiveness of intervention depends on regulator independence.
Asymmetric informationGovernment can't know optimal X, optimal price, or true costs. Setting regulation incorrectly may worsen outcomes.
Natural monopolyBreaking up a natural monopoly raises ATC. Regulation or nationalisation is preferable to competition in these markets.
Dynamic efficiency trade-offReducing monopoly profits may reduce R&D spending. Short-term consumer gain vs long-term innovation loss.
ContestabilityIf the market is contestable (low sunk costs), threat of entry may discipline the firm without needing regulation at all.
International competitivenessBreaking up domestic firms may weaken their ability to compete globally. A national champion argument.
Common Errors — Examiner Reports
Examiner Alert — Competition Policy
Vague answers about "the government should regulate" — must name the specific tool: CMA merger review, RPI-X price cap, deregulation, or nationalisation
Not stating the SLC test — always say "the CMA applies the substantial lessening of competition test"
Confusing privatisation with deregulation — privatisation = ownership change; deregulation = removing legal barriers to entry. Different policies, different effects.
One-sided answers — must evaluate BOTH sides of privatisation/nationalisation debate
Examiner Alert — Regulation
Not evaluating regulation itself — regulatory capture and asymmetric information are essential evaluation points
Forgetting the natural monopoly distinction — regulation is appropriate for natural monopolies; promoting competition is appropriate for other structures
Not linking to efficiency — always state which type of efficiency the intervention aims to improve (allocative, productive, dynamic)
Practice Question
Question (25 marks): Evaluate the view that privatisation of natural monopolies has failed to deliver the efficiency gains promised.
1
Define: Privatisation (transfer of state-owned enterprises to private ownership). Natural monopoly (LRAC still falling at market demand — one firm is most efficient).
2
KAA 1 — Case that privatisation has failed: Private natural monopolies exploit consumers (water bills have risen significantly since 1989). Shareholders extract profits from essential services. Under-investment in infrastructure (sewage overflows in rivers). No real competition possible — contestability is near zero due to massive sunk costs.
3
KAA 2 — Case that privatisation has succeeded: BT and telecoms — significant innovation, falling prices, increased choice since privatisation. Profit motive drove efficiency gains in many sectors. Private capital funded expansion without public borrowing. Regulation (RPI-X) constrains pricing.
4
Evaluation: (i) Depends on the market — telecoms is now competitive (not a natural monopoly); water infrastructure is still a natural monopoly. (ii) Regulatory effectiveness — Ofcom has been effective; Ofwat criticised for allowing excessive dividends. (iii) Regulatory capture — regulators may be too close to industry. (iv) Dynamic efficiency — private firms have incentive to innovate, but may underinvest in infrastructure with slow returns.
5
Conclusion: "The success of privatisation depends critically on whether the market is a genuine natural monopoly. Where competition has developed (telecoms), privatisation has delivered consumer benefits. Where natural monopoly persists (water), private ownership combined with weak regulation has failed to prevent exploitation. The appropriate policy is therefore market-specific: regulate or nationalise true natural monopolies; allow competition where it can develop."
Summary
Government Intervention Tools
ToolPurposeKey Detail
CMA merger controlPrevent mergers that lessen competition>25% share OR >£70m turnover triggers review
Cartel enforcementPunish collusionFines up to 10% of global turnover
RPI-X price capsRegulate natural monopoly pricingPrice ≤ RPI − X; incentivises efficiency
Sector regulatorsOversee specific industriesOfwat, Ofgem, Ofcom, ORR, FCA
DeregulationRemove barriers to entryIncreases competition and contestability
PrivatisationTransfer state firms to private sectorProfit motive → efficiency; risk: monopoly exploitation
NationalisationState takes ownershipFor natural monopolies; risk: X-inefficiency
The Golden Rule
Every competition policy answer must weigh market failure vs government failure. The question is never "should the government intervene?" — it's "will intervention create a net welfare gain?" Always evaluate using: regulatory capture, asymmetric information, and whether the market is a natural monopoly.
Next: The CMA — UK Competition Regulator