One reason why purchasing power parity may not work perfectly has to do with barriers to trade such as tariffs and quotas on imports.

Name: One reason why purchasing power parity may not work perfectly has to do with barriers to trade such as tariffs and quotas on imports.
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Question

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Trade barriers can affect the price of goods and services, making them different from country to country and thus affecting the accuracy of purchasing power parity calculations.

One Reason Why Purchasing Power Parity May Not Work Perfectly