ECON1102 Chapter Notes - Chapter 4: Nominal Rigidity, Menu Cost, National Accounts

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11 Nov 2018
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Income-expenditure model = keynesian model a model of income determination in the short-run (generally becomes inflation in the long-run) Changes in agg expenditure appear to have their largest effect on real production within a period of 2 years. Key assumption of keynesian model friction: prices of goods are fixed (common to say sticky) in the short-run: firms do not change prices in response to a change in demand for their product. Instead they fix their price and then meet the demand by varying their level of production. In the short-run firms will: accommodate a cut in demand by reducing output and employment, not by reducing prices, accommodate a rise in demand by increasing output and employment, not by increasing prices. Deeper assumptions (microeconomic foundations: firms have some ability to set prices (not perfectly competitive world) some market power, firms face some cost to changing prices (cid:494)menu costs".

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