In an open economy with government intervention, the marginal propensity to save is 0.15, the marginal propensity to tax is 0.10, and the marginal propensity to import is 0.25.
If there is an autonomous increase in private investment of £12 billion£12\text{ billion}£12 billion, what are the resulting value of the multiplier (kkk) and the final change in the equilibrium level of national income (ΔY\Delta YΔY) through the circular flow of income?
k=4.0k = 4.0k=4.0 and ΔY=+£48 billion\Delta Y = +£48\text{ billion}ΔY=+£48 billion
k=0.5k = 0.5k=0.5 and ΔY=+£6 billion\Delta Y = +£6\text{ billion}ΔY=+£6 billion
k=2.0k = 2.0k=2.0 and ΔY=+£24 billion\Delta Y = +£24\text{ billion}ΔY=+£24 billion
k=2.0k = 2.0k=2.0 and ΔY=+£6 billion\Delta Y = +£6\text{ billion}ΔY=+£6 billion
222 exam-style questions on AQA A Level Economics 2.2 How the macroeconomy works: the circular flow of income, aggregate demand/aggregate supply analysis and related concepts, covering 2.2.1 The circular flow of income, 2.2.2 Aggregate demand and aggregate supply analysis, 2.2.3 The determinants of aggregate demand, 2.2.4 Aggregate demand and the level of economic activity, 2.2.5 Determinants of short-run aggregate supply, and 2.2.6 Determinants of long-run aggregate supply. Each one has a worked solution and a mark scheme showing where the marks go.