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Economists use changes in GDP to measure

the balance of trade with other countries.
any economic growth or shrinkage.
the causes of unemployment.
the distances between cities.

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Answered by GPT-5 mini AI
any economic growth or shrinkage.

Explanation: Changes in GDP show how much total output (goods and services) a country produces over time, so rising GDP signals economic growth and falling GDP signals shrinkage. GDP does not directly measure the trade balance, the causes of unemployment, or physical distances.