2.2.2 Consumption

Edexcel A-Level Economics (9EC0) | Theme 2.2.2

Specification Coverage: Edexcel unit 2.2.2 - Consumption. Students should be able to understand and explain how disposable income influences consumption, the relationship between savings and consumption, how interest rates, consumer confidence, wealth effects, and income distribution affect household spending, and how changes in consumption shift aggregate demand.

The Primary Influence: Disposable Income

Consumption is spending by households on goods and services. It is the largest component of aggregate demand in most economies.

Disposable Income (Yd): The key determinant of consumption. Consumption can be expressed as \( C = f(Yd) \).

Disposable income is income after direct taxes, such as income tax, and after adding government transfer payments, such as benefits.

A rise in disposable income leads to a rise in consumption, and vice versa.

The Savings Relationship

Disposable income is split between consumption and savings. Therefore:

\[ Yd = C + S \]

There is an inverse relationship between the savings ratio, meaning savings as a percentage of income, and consumption.

Higher savings mean lower consumption in the short run.

Other Key Influences on Consumption

Interest Rates

  • Higher interest rates increase the incentive to save, reducing consumption.
  • They increase the cost of borrowing, for example for loans and mortgages, which reduces consumption.
  • They increase monthly debt repayments, leaving less disposable income for other spending.
  • Lower interest rates have the opposite effect and tend to stimulate consumption.

Consumer Confidence

High confidence, for example during strong growth and low unemployment, encourages spending and borrowing and discourages saving.

Low confidence, for example during a recession or rising unemployment, increases precautionary saving and reduces spending on non-essential items.

Wealth Effects

A rise in household wealth, for example from higher house prices or share prices, creates a positive wealth effect.

Households feel richer and more secure, so they increase their consumption and may become more willing to borrow.

A fall in wealth creates a negative wealth effect and reduces consumption.

Distribution of Income

Changes in how income is distributed affect total consumption.

Lower-income households usually have a higher marginal propensity to consume (MPC). Policies that raise their incomes, such as a higher minimum wage, may increase total consumption more than policies that benefit higher earners.

Exam Preparation

  • Link to AD: Consumption is C in AD = C + I + G + (X - M). A change in any influence on consumption will shift the AD curve.
  • Distinguish Income vs. Wealth: Income is a flow, such as salary, whereas wealth is a stock, such as savings or the value of a house. Both affect consumption through different mechanisms.
  • Evaluation: The effect of a change, such as a tax cut, depends on whether it is seen as temporary or permanent, on consumer expectations and confidence, and on the MPC of those receiving the extra income.
  • Real-World Application: Use recent events to illustrate these influences, such as higher consumption after lockdowns because of pent-up demand and savings, or weaker consumption during periods of rising interest rates.