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(a):
Unplanned inventory in the economy.
(a):
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Explanation of Solution
The unplanned inventory investment can be calculated by subtracting the consumption from the real
Thus, the unplanned inventory in this case is -75. Similarly, the other case unplanned inventory can be calculated and the table can be completed as follows:
Possible levels of employment (millions of workers) | Real GDP (Output) equals disposable income (billions of dollars) | Consumption (billions of dollars) | Unplanned inventory (billions of dollars) |
40 | $325 | $300 | $-75 |
45 | 375 | 325 | -50 |
50 | 425 | 350 | -25 |
55 | 475 | 375 | 0 |
60 | 525 | 400 | 25 |
65 | 575 | 425 | 50 |
70 | 625 | 450 | 75 |
Aggregate expenditure: Aggregate expenditure is the measure of the
(b):
Marginal propensity to consume and save.
(b):
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Explanation of Solution
The marginal propensity to consume can be calculated by dividing the change in the consumption by the change in the disposable income. In the first place, when the consumption increases from $300 to $325, the change in the consumption is $25 billion. The real GDP was $325 and it changes to $375, which denotes the change in the disposable income by $50 billion. Thus, MPC can be calculated as follows:
Thus, MPC is 0.5. The MPS can be calculated by subtracting the MPC from 1 as follows:
Thus, the MPS is also equal to 0.5.
(c):
Equilibrium level of output when the economy employs 40 million workers.
(c):
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Explanation of Solution
The level of unplanned inventory in the economy when employing 40 million workers is $75 billion. Thus, it means that the businesses in the economy would invest more and expand their output in the economy. This leads to an increase in the real GDP and the equilibrium level of real GDP, which is at $475 billion, where the unplanned inventory is $0.
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MindTap Economics, 1 term (6 months) Printed Access Card for Tucker's Macroeconomics for Today, 10th
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