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To distinguish between planned expenditure and actual output, macroeconomic models often assume that all changes in business inventories are unplanned. As aggregate demand (AD) only accounts for planned spending, these unplanned changes in inventories are explicitly excluded from its calculation.

Unplanned Inventory Investment and Aggregate Demand

In a specific period, an economy's firms produce a total of $500 billion worth of goods and services. However, the total planned spending from households, firms for capital goods, government, and net exports amounts to only $480 billion. Based on this information, which of the following outcomes is true?

Based on the scenario provided, calculate the unplanned change in inventories for the quarter and explain what this change signals to the firm about the state of the economy and how it should adjust its future output.

Inventory Management at a Manufacturing Firm

Imagine an economy where the total value of goods and services produced in a given year is less than the total amount of planned spending by households, firms, and the government. Explain what will happen to business inventories in this scenario and describe how firms are likely to adjust their future production levels in response.

Output, Planned Spending, and Inventory Adjustments

If the total planned spending in an economy is greater than the total value of goods and services produced, businesses will experience an unplanned increase in their inventories.

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