ECN 204 Chapter 14: Chapter 14 - Aggregate Demand & Aggregate Supply

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23 Apr 2012
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Over the long run, real gdp grows about 2% per year on average. In the short run, gdp fluctuates around its trend. Recessions: periods of falling real incomes and rising unemployment. Short-run economic fluctuations are often called business cycles. Explaining these fluctuations is difficult, and the theory of economic fluctuations is controversial. Most economists use the model of aggregate demand and aggregate supply to study fluctuations. This model differs from the classical economic theories economists use to explain the long run. The basic model of aggregate demand and aggregate supply: Economists use the model of aggregate demand and aggregate supply to explain short-run fluctuations in economic activity around its long-run trend. Aggregate-demand curve shows the quantity of goods and services that households, firms, and the government want to buy at each price level. Aggregate-supply curve shows the quantity of goods and services that firms choose to produce and sell at each price level.

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