ECON 209 Lecture Notes - Lecture 4: Nominal Rigidity, Phillips Curve, Output Gap

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Chapter 24 - from the short-run to the long-run. In ationary gap - aggregate supply shifts to the left due to rising wages and prices (input costs) Recessionary gap - aggregate supply shifts to the right due to lower wages and prices (input costs) This general adjustment process - from output gaps to factor prices is summarized by the. Recessionary gap - wages fall (as curve shifts right) In ationary gap - wages rise (as curve shifts left) wage stickiness - takes wages longer to fall than it takes them to rise (when there is a recessionary output gap) When y = *y, the unemployment rate equals nairu, u* - only structural and frictional unemployment. This process might be slower because of sticky wages. Speed of adjustment: if wages are exible: wages fall rapidly whenever there is unemployment, the resulting shift in the as curve could quickly eliminate recessionary gaps. If wages are sticky: as curve shifts more slowly.

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