Government Intervention: Regulation and Legislation

While taxation and subsidies work through the price mechanism, regulation and legislation take a more direct, command-and-control approach to correcting market failure. Governments can set legally binding rules that restrict or mandate certain behaviours, control prices, limit quantities, or establish standards. These interventions bypass the price mechanism entirely, imposing legal requirements backed by penalties.

Key Definition: Regulation is the use of laws, rules, and standards imposed by government or regulatory bodies to control the behaviour of firms and individuals in order to correct market failure or achieve policy objectives.

---

Types of Regulatory Intervention

1. Minimum Prices (Price Floors)

A minimum price is a legally imposed price below which a good or service cannot be sold. It is effective only when set above the free market equilibrium price.

Examples:

• National Minimum Wage (NMW) / National Living Wage (NLW) — In April 2024, the NLW for workers aged 21 and over was £11.44 per hour. The purpose is to prevent exploitation of workers and reduce in-work poverty. The Low Pay Commission advises the government on appropriate rates.

• Minimum Unit Pricing (MUP) for alcohol in Scotland — Set at 50p per unit since May 2018 (increased to 65p in September 2024). The aim is to reduce harmful drinking, particularly among heavy drinkers who tend to buy the cheapest alcohol. Research by NHS Health Scotland found a 13% reduction in alcohol-related deaths in the first year.

Diagram analysis:

• The minimum price (Pmin) is set above the equilibrium price (Pe)
• At Pmin, quantity supplied (Qs) exceeds quantity demanded (Qd), creating excess supply (a surplus)
• In the labour market, excess supply of labour is unemployment — this is the key concern with the minimum wage

Evaluation:

Strengths	Weaknesses
Directly raises the price of demerit goods, reducing consumption	May cause unemployment if set too high above the equilibrium wage
Protects workers from exploitation (minimum wage)	May create a black market for goods sold below the legal minimum
Simple to understand and enforce	Does not account for regional variations (cost of living differs between London and rural Wales)
Targets the cheapest products most associated with harm (MUP for alcohol)	Firms may reduce non-wage benefits (e.g., breaks, bonuses) to offset higher labour costs

Exam Tip: When discussing minimum wages, always refer to the debate between neoclassical economists (who predict unemployment from above-equilibrium wages) and empirical researchers like David Card and Alan Krueger (1994), who found that moderate minimum wage increases in the US did not significantly reduce employment. This empirical challenge to traditional theory is excellent evaluation material.

---

2. Maximum Prices (Price Ceilings)

A maximum price is a legally imposed price above which a good or service cannot be sold. It is effective only when set below the free market equilibrium price.

Examples:

• Rent controls — Some cities have imposed maximum rents to protect tenants. Although not currently in effect in England, Scotland introduced rent controls under the Cost of Living (Tenant Protection) Act 2022, capping rent increases at 3% annually.

• Energy price cap — Ofgem's energy price cap limits the maximum amount energy suppliers can charge per unit of gas and electricity. Introduced in January 2019, it was designed to protect disengaged consumers who remained on expensive default tariffs. The cap was set at £1,568 per year for a typical household in Q1 2024.

Diagram analysis:

• The maximum price (Pmax) is set below the equilibrium price (Pe)
• At Pmax, quantity demanded (Qd) exceeds quantity supplied (Qs), creating excess demand (a shortage)
• Producers are unwilling or unable to supply enough at the lower price, leading to shortages, queues, or rationing

Evaluation:

Strengths	Weaknesses
Protects consumers from excessively high prices	Creates excess demand (shortages)
Makes essential goods more affordable for low-income households	Reduces the incentive for suppliers to produce — can worsen supply in the long run
Prevents monopoly pricing exploitation	May encourage a black market where goods are sold illegally above the cap
Provides stability (energy price cap reduces bill volatility)	Landlords may withdraw from the rental market, reducing housing supply (Sweden's rent controls led to a severe housing shortage)

---

3. Quantity Controls and Bans

Rather than controlling prices, the government can directly limit the quantity of a good produced or consumed, or ban it entirely.

Examples: