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The multiplier model is a framework used to analyze aggregate demand, named specifically for its inclusion of the multiplier process. This model explains how an initial change in autonomous spending results in a proportionally larger total change in national income.

The Multiplier Model

In a closed economy with no taxes, the marginal propensity to consume is 0.8. If the government increases its spending on new infrastructure by $100 billion, what will be the total resulting increase in national income?

An economy is experiencing a downturn. The government wants to stimulate economic activity and is considering two options, each with an initial fiscal cost of $200 billion. Assume that households in this economy tend to spend 75 cents of every extra dollar of income they receive. Which of these two options would likely result in a larger total increase in national income? Explain your reasoning.

Fiscal Policy Impact Analysis

An economy experiences a sudden $20 billion increase in autonomous investment spending. Arrange the following events in the correct chronological sequence to illustrate the resulting multiplier process.

The multiplier model provides a framework for understanding how an initial change in autonomous spending can lead to a larger total change in national income. However, its predictions rely on several key simplifying assumptions. Critically evaluate two of these assumptions and explain how they might cause the model to overstate the actual change in national income in a real-world economy.

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