Buffer Stocks & Information Provision (Cambridge International A-Level Economics)

Buffer stock schemes

Spec point — 3.2.5

• Buffer stocks occur when the government buys excess supply when prices are low and sells stocks when prices are high to stabilise prices

A buffer stock scheme for rice in Vietnam with P2 as the floor and P3 as the ceiling

Diagram explanation

• The government sets a price floor(P2) and price ceiling (P3) to stabilise prices within a target range

• When price falls:

  • Price falls below P2 → government buys excess supply → market supply decreases → price rises back towards P2

• When price rises:

  • Price rises above P3 → government sells stocks → market supply increases → price falls back towards P3

Case Study Rice buffer stock scheme in India (food corporation of India)

Context

India has experienced significant volatility in rice prices due to changing harvest conditions and global supply shocks. This creates uncertainty for both farmers and consumers. Without intervention, prices can fall sharply in years of excess supply, reducing farmer income

Action taken

• The government, through the Food Corporation of India (FCI), buys rice at a minimum support price (MSP)
• Rice is stored as part of a buffer stock
• Stocks are released when prices rise or during shortages
• In 2023–2024, India held over 50 million tonnes of rice reserves

Outcome

The scheme helps stabilise prices and protect farmer incomes by preventing prices from falling below the MSP. It also improves food security, with rice released during periods of shortage

However, maintaining large buffer stocks is costly, with high storage and wastage risks. There are also concerns about government failure, as excessive stockpiling can distort market signals and lead to inefficient allocation of resources

The effectiveness of buffer stock schemes

Spec point — 3.2.5

Advantages

• Price stability

  • Helps reduce large fluctuations in prices, making prices more predictable for both producers and consumers

• Income stability for producers

  • Farmers and other producers are protected from sudden falls in prices caused by oversupply or poor market conditions

• Food security

  • Maintaining reserves can help ensure supplies are available during shortages caused by bad harvests or supply shocks

• Encourages investment

  • More stable prices and incomes may encourage producers to invest in improving productivity

Disadvantages

• High storage costs

  • Buying, storing and maintaining stocks can be expensive, especially for perishable goods

• Difficulty in setting the correct price range

  • If the intervention price is set incorrectly, the scheme may fail or require excessive government spending

• Risk of waste

  • Stored goods may spoil or become outdated, leading to losses

• Government failure

  • Poor management, forecasting errors or political pressure can make schemes inefficient

• Distorts market signals

  • Artificially stabilised prices may reduce incentives for producers to respond to changes in demand and supply

Reducing information failure

Provision of information

• Information asymmetry leads to market failure
• Governments provide information to reduce information asymmetry

Examples

• Health information

  • Governments provide information on the risks of smoking, alcohol misuse and poor diets through public health campaigns and warning labels.

• Energy efficiency labels

  • Appliances and vehicles are labelled with energy efficiency ratings to help consumers compare long-term costs and environmental impact.

• Education and careers guidance

  • Information on exam results, training options and employment prospects helps students and workers make better education and career choices.

• Food labelling

  • Nutritional information and allergy warnings allow consumers to make safer and healthier consumption decisions. E.g. traffic light system

• Environmental information

  • Governments publish data on air quality, pollution levels and recycling to raise awareness of negative externalities.

The effectiveness of tackling information failure

The effectiveness of providing information

Advantages

• Addresses information failure directly

  • Helps consumers and producers make decisions based on accurate information rather than assumptions

• Preserves consumer choice

  • Individuals remain free to decide, unlike with bans or regulations

• Low cost compared to other policies

  • Often cheaper than subsidies, taxes or direct regulation

• Encourages socially desirable behaviour

  • Can reduce demerit good consumption and promote positive externalities

• Avoids market distortion

  • Does not interfere directly with prices or output

Disadvantages

• Limited effectiveness

  • Information does not guarantee behaviour will change, especially for addictive goods

• Time lag

  • Public attitudes and habits may take a long time to adjust

• Unequal impact

  • More educated or higher-income groups may benefit more from the information provided

• Risk of misinformation or bias

  • Information may be unclear, outdated or influenced by political interests

• Requires consumer engagement

  • Assumes individuals will understand and act upon the information given

Case Study Context

The USA has high obesity rates, with around 42% of adults classified as obese (CDC). Consumers often lacked clear information about calorie content when purchasing fast food, leading to over-consumption of demerit goods

Action taken

• In 2018, the US government required large restaurant chains (20+ outlets) to display calorie information on menus
• The policy aimed to reduce information asymmetry at the point of purchase

Information provision reduces unhealthy choices

Outcome

Studies found that calorie labelling reduced average calories purchased by around 20–60 calories per transaction (FDA studies), suggesting some improvement in consumer decision-making

However, the overall impact on obesity has been limited, as many consumers do not significantly change behaviour, particularly where demand is habit-driven or price inelastic