Explain the impact of a fiscal expansion using the IS-LM model.

Using this framework, Mankiw explains how shocks (e.g., a fall in consumer confidence, an oil price increase) cause recessions or booms. The PowerPoint slides for Chapter 12 are particularly useful for tracing the effects of expansionary monetary policy: an increase in the money supply lowers interest rates, stimulates investment, shifts AD right, and raises output in the short run — but only prices in the long run.

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