EC 202 Lecture Notes - Lecture 14: Potential Output, Rational Expectations, Adaptive Expectations

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In the long-run, the economy tends to rebound back to potential gdp and the natural rate of unemployment. The importance of the potential gdp in the long-run. Changes in aggregate demand only have a short run impact on output and unemployment. An increase in ad causes output to increase due to the higher price level. This causes firms to demand more labor, which pushes wages up. Higher wages is the same as an increase in the price of a key input causing as to fall. This reduces real gdp back to potential gdp and raises prices further. There are some neoclassicals who argue that the change in prices and wages may be rapid because of rational expectations. The theory that people form the most accurate possible expectations about the future that they can using all information available to them. The theory that people look at past experience and gradually adapt their beliefs and behaviors as circumstances change.

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