3. (1.5 marks) Consider an economy in which the consumption function takes the following algebraic form: C= 100+ 0.7Y And in which Investment (I) is 700. a) Find the equilibrium level of GDP from the requirement that Y=C+I b) Suppose investment rises to 900, what would be the equilibrium level of GDP? c) What is the change in GDP? d) What is the value of the multiplier?

2. Suppose we have the following data to study if a country's per capita income (measured in thousands of dollars) is a function of its R&D spending (measured as a percentage of GDP). ( country 1 2 3 4 xi yi 1 4 2 6 3 7 4 10 (1) Calculate beta hats with OLS. (2) Calculate R2 and adjusted R².

4. Study Questions and Problems #4 Real GDP (Y) and aggregate expenditures (AE) are shown for an economy in the first two columns of the following table. Suppose that economic forecasters predict government spending to increase in the near future from G=$1 trillion to G=$1.25 trillion. Recalculate the value of aggregate expenditures given the new value of G=$1.25 trillion. Enter those values to the second decimal place in the third column of the table. Real GDP (Y) (Trillions of dollars per year) 0 1 2 3 4 5 6 7 8 9 10 G=$1 trillion (Trillions of dollars per year) 1.25 2.00 2.75 3.50 4.25 Aggregate Expenditures 5.00 5.75 6.50 7.25 8.00 8.75 G=$1.25 trillion (Trillions of dollars per year) 1.56 2.5 3.44 4.38 5.31 6.25 7.19 8.13 9.06 10 10.94 The black line on the following graph represents the 45-degree line where real GDP equals aggregate expenditures. Use the blue points (circle symbol) to plot the aggregate expenditures line for this economy when G-$1.25 trillion. Line segments will…

Question 35 Suppose real estate analysts expect that 100,000 homes will be needed in a particular community by 2014. If the current number of homes in the community is only 50,000, we can expect to see a significant increase in the demand for investment. True O False