ECN 204 Lecture Notes - Lecture 16: Aggregate Supply, Phillips Curve, Aggregate Demand

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From the short run to the long run: short-run aggregate supply. Input prices are inflexible: aggregate supply curve is upwardly sloping, long-run aggregate supply. Input prices are fully flexible: vertical aggregate supply, the transition. From the short-run as to the long-run as: production above potential output, high demand for inputs. Input prices rise: short run aggregate supply shifts left, return to potential output, production below potential output, lower demand for inputs. Input prices fall: short-run aggregate supply shifts right, return to potential output. Applying the long-run ad-as model: demand-pull inflation occurs when an increase in aggregate demand pulls up the price level. In the short run, demand-pull inflation drives up prices and output. In the long run, output is restored to gdpf and only the price level is higher. Cost-push inflation: cost-push inflation arises from factors that increase the cost of production at each price level.

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