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ECON20521 Macroeconomics Analysis 3 Tutorial 4 1. Explain the shape of the representative firms demand for labour 2. What are the effects of a temporary increase in government purchases on the real interest rate aggregate out put, employment, the real wage, consumption and invest- ment? 3. Determine how the following affects theslope of the out put demand curve, and explain your results: (a) The MPC nereases (b) The intertemporal substitation effect of the real interest rate on current con- (c) The demand for investment goods becomes less responsive to the real interest rate.

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