Chapter 10: Macroeconomic objectives (page 196)
What are the main macroeconomic policies used to achieve macroeconomic objectives?
Short Answer
Fiscal, Monetary and Supply Side policies
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Chapter 10: Macroeconomic objectives (page 196)
What are the main macroeconomic policies used to achieve macroeconomic objectives?
Fiscal, Monetary and Supply Side policies
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Precisely how do the MPC and the APC differ? How does the MPC differ from the MPS? Why must the sum of the MPC and the MPS equal 1?
If a \(50 billion initial increase in spending leads to a \)250 billion change in real GDP, how big is the multiplier?
1.0
2.5
4.0
5.0
Refer to the table in Figure 10.5 and suppose that the real interest rate is 6 percent. Next, assume that some factor changes such that the expected rate of return declines by 2 percentage points at each prospective level of investment. Assuming no change in the real interest rate, by how much and in what direction will investment change? Which of the following might cause this change: (a) a decision to increase inventories; (b) an increase in excess production capacity?

Linear equations for the consumption and saving schedules take the general form C = a + bY and S = − a + (1 − b)Y, where C, S, and Y are consumption, saving, and national income, respectively. The constant a represents the vertical intercept, and b represents the slope of the consumption schedule.
a. Use the following data to substitute numerical values for a and b in the consumption and saving equations.
| National Income (Y) | Consumption (C) |
| \(0 | 80 |
| 100 | 140 |
| 200 | 200 |
| 300 | 260 |
| 400 | 320 |
b. What is the economic meaning of b? Of (1 − b)?
c. Suppose that the amount of saving that occurs at each level of national income falls by \)20 but that the values of b and (1 − b) remain unchanged. Restate the saving and consumption equations inserting the new numerical values, and cite a factor that might have caused the change.
Use your completed table for problem 1 to solve this problem. Suppose the wealth effect is such that \(10 changes in wealth produce \)1 changes in consumption at each income level. If real estate prices tumble such that wealth declines by \(80, what will be the new level of consumption and saving at the \)340 billion level of disposable income? The new level of saving?
| Level of Output and Income (GDP = DI) | Consumption | Saving | APC | APS | MPC | MPS |
| \(240 | \)244 | -$4 | 1.016 | -0.016 | 0.8 | 0.2 |
| 260 | 260 | 0 | 1 | 0 | 0.8 | 0.2 |
| 280 | 276 | 4 | 0.985 | 0.014 | 0.8 | 0.2 |
| 300 | 292 | 8 | 0.973 | 0.026 | 0.8 | 0.2 |
| 320 | 308 | 12 | 0.962 | 0.037 | 0.8 | 0.2 |
| 340 | 324 | 16 | 0.952 | 0.047 | 0.8 | 0.2 |
| 360 | 340 | 20 | 0.944 | 0.055 | 0.8 | 0.2 |
| 380 | 356 | 24 | 0.936 | 0.063 | 0.8 | 0.2 |
| 400 | 372 | 28 | 0.93 | 0.07 | 0.8 | 0.2 |
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