GDP includes the value of final goods, and not intermediate goods, because:

Question

BlackTom AI · Accepted Answer

Intermediate goods' value is embedded in the price of final goods, so counting both would double-count the same output.

1. Relevant knowledge points and concepts
- Gross Domestic Product (GDP) measures the market value of all final goods and services produced within a country in a period.
- Final goods are sold to end-users; intermediate goods are inputs used to produce final goods.
- To avoid double counting, GDP either includes only final goods or sums "value added" at each production stage (which equals final market value).

2. Step-by-step reasoning
- If GDP included intermediate goods plus final goods, the same economic output would be counted multiple times.
- Use a simple numerical example to illustrate.

3. Calculations with intermediate steps
- Farmer sells wheat to miller for $100 (farmer's output = $100).
- Miller turns wheat into flour and sells to baker for $150 (miller's value added = $150 − $100 = $50).
- Baker makes bread and sells to consumer for $300 (baker's value added = $300 − $150 = $150).
- Summing value added at each stage: $100 (farmer) + $50 (miller) + $150 (baker) = $300, which equals the final consumer price.
- If instead we added all sales receipts ($100 + $150 + $300 = $550), we'd overstate production by counting the same inputs repeatedly.

4. Why the correct answer is correct
- The correct option states that "the value of intermediate goods is already included in the value of final goods." The example shows value added across stages sums to the final value, so including intermediate goods separately would double-count. Therefore GDP counts final goods (or uses value-added) to measure total production accurately.

5. Why the other choices are incorrect
- "Too difficult to measure": Measurement difficulty is not the conceptual reason; the rationale is to avoid double counting. Economists can and do measure production via value-added methods.
- "Measured by GNP": GNP differs from GDP by ownership (nationals vs. domestic production); it does not justify counting intermediate goods separately.
- "Depends on the number of separate production processes": Regardless of how many stages there are, value added at each stage sums to the final value—so the reason is not the number of processes but avoiding double counting.

6. Conclusion
- Therefore, the correct answer is: "the value of intermediate goods is already included in the value of final goods," which matches the provided answer.

GDP includes the value of final goods, and not intermediate goods, because:单项选择题

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