The causes of cost-push inflation

Cost-push inflation occurs when the expenses involved in producing goods and services increase, leading firms to raise prices to maintain their profit margins. This type of inflation results in the aggregate supply curve shifting leftwards, reducing overall supply in the economy at existing price levels.

Factors leading to cost-push inflation

• Increases in wages beyond productivity gains - If salaries rise faster than workers' output, firms face higher labour costs. This can trigger a wage-price spiral, where higher prices prompt further demands for pay rises.
• Rises in the cost of imported raw materials - When global prices for essential inputs like commodities increase, domestic producers pay more, which they pass on through higher selling prices. A depreciation in the national currency exacerbates this by making imports even costlier.
• Increases in indirect taxes - Government-imposed taxes on goods, such as value-added tax, add to production costs. If demand for the affected products is price inelastic, firms can transfer most of the tax burden to consumers via price hikes.

The causes of demand-pull inflation

Demand-pull inflation arises when aggregate demand in the economy grows faster than the available supply of goods and services, enabling sellers to increase prices. This shifts the aggregate demand curve to the right, creating upward pressure on the general price level.

Factors leading to demand-pull inflation

• High levels of consumer spending or export demand - Strong consumer confidence can boost spending, often fuelled by low interest rates that make borrowing cheaper. Similarly, rapid growth in overseas economies can heighten demand for a country's exports.
• Money supply expanding faster than economic output - When the quantity of money circulating exceeds the production of goods and services, it can drive up prices, as there is more money chasing the same amount of output.
• Shortages due to bottlenecks - Rapid demand growth in a near-full capacity economy can cause scarcities in labour or resources, pushing up costs and prices. These increases may spread across markets, contributing to broader inflation.

Fisher's equation of exchange and the monetarist view

Fisher's equation of exchange illustrates the relationship between money in the economy and price levels, providing a framework for understanding inflation from a monetarist perspective. Monetarists emphasise that controlling the money supply is key to managing inflation.

Fisher's equation of exchange

$MV=PT$

Where:

• M = Money supply (total amount of money in the economy)
• V = Velocity of money (speed at which money circulates through spending)
• P = Price level (average prices in the economy)
• T = Aggregate transactions (total volume of economic transactions)

The monetarist interpretation

Monetarists argue that in the short term, velocity (V) and transactions (T) remain relatively stable. Therefore, any rise in the money supply (M) directly leads to an increase in the price level (P). To prevent inflation, they advocate strict controls on money supply growth, ensuring it aligns with real economic output. Excessive money creation can lead to hyperinflation, where prices escalate rapidly to hundreds of percent.

Worked example - Applying Fisher's equation of exchange

In an economy, the money supply (M) is £400 billion, the velocity of money (V) is 5, and the total aggregate transactions (T) are 1000 billion units. Calculate the price level (P) and explain what would happen if the money supply increased to £500 billion, assuming V and T remain constant.

Step 1: Identify the values

• M = £400 billion
• V = 5
• T = 1000 billion units

Step 2: Apply the formula to calculate initial price level

$P=\frac{MV}{T}$

$P=\frac{\pounds 400\times 5}{1000}=\frac{\pounds \mathrm{2,000}}{1000}=\pounds 2.00$

Step 3: Calculate new price level after money supply increase

New M = £500 billion

$P=\frac{\pounds 500\times 5}{1000}=\frac{\pounds \mathrm{2,500}}{1000}=\pounds 2.50$

Step 4: Interpretation

The price level rises from £2.00 to £2.50, illustrating how an increase in money supply, without changes in velocity or transactions, directly causes inflation according to the monetarist view.

The effects of inflation on the economy

Inflation erodes purchasing power and can disrupt economic stability, affecting individuals, businesses, and international trade. While low inflation (up to 2%) is generally acceptable, higher rates bring several negative consequences.

Impacts on living standards and saving

• Reduction in living standards - People on fixed or low incomes, such as those relying on benefits or minimum-wage jobs, suffer as their money buys less, leading to a decline in real income.
• Discouragement of saving - The real value of savings diminishes over time, prompting people to spend sooner to avoid further price rises.
• Shortage of funds for investment - Lower saving reduces available capital for lending, potentially forcing up interest rates and deterring business investment.

Effects on businesses and the wider economy

• Uncertainty and reduced investment - Firms face unpredictable costs, making long-term planning difficult and often leading to lower investment, which harms future economic growth.
• Shoe leather and menu costs - Consumers spend extra time seeking the best deals (shoe leather costs), while firms incur expenses updating price lists or labels (menu costs).
• Damage to international competitiveness - Higher domestic prices make exports more expensive and imports cheaper, potentially worsening the balance of payments and increasing unemployment through reduced export demand.

Deflation and government policies to control inflation

Deflation happens when inflation drops below 0%, signalling economic weakness, while governments aim for stable, low inflation through targeted policies.

Characteristics and causes of deflation

• Falling aggregate demand - Often linked to high unemployment, as reduced spending creates a downward spiral where consumers delay purchases expecting even lower prices, further slowing economic activity.
• Declining production costs - Technological advances can lower costs, allowing firms to reduce prices, though this form of deflation may be less harmful if it reflects efficiency gains.
• Negative impacts - Lower prices cut firm profits, stifling growth and potentially leading to job losses.

Government approaches to managing inflation

Governments target inflation at around 2% using a mix of tools to balance stability and growth.