Consider a hypothetical closed economy in which households spend $0.75 of each additional dollar they earn and save the remaining $0.25. The marginal propensity to consume (MPC) for this economy is , and the spending multiplier for this economy is . Suppose the government in this economy decides to increase government purchases by $250 billion. The increase in government purchases will lead to an increase in income, generating an initial change in consumption equal to . This increases income yet again, causing a second change in consumption equal to . The total change in demand resulting from the initial change in government spending is .
