Economics – The circular flow of income | e-Consult
The circular flow of income (1 questions)
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The multiplier process describes the mechanism by which an initial change in aggregate expenditure (AE) leads to a larger change in national income (GDP). It's based on the principle that an increase in spending generates income for someone else, who then spends a portion of that income, and so on.
Key elements include:
- Marginal Propensity to Consume (MPC): This is the proportion of an additional unit of income that households choose to spend rather than save. It's a crucial determinant of the multiplier's size.
- Leakages: These are components of income that are not re-spent in the domestic economy. Common examples include savings, taxes, and imports. Higher leakages reduce the size of the multiplier.
- Government Spending: Government expenditure directly adds to aggregate demand and can influence the multiplier effect.
The multiplier is calculated as 1 / (1 - MPC). For example, if the MPC is 0.8, the multiplier is 5. This means a £1 increase in autonomous spending will lead to a £5 increase in national income. The multiplier effect is amplified by the recursive nature of spending – each round of spending generates further income and spending.