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Title: Trade Data: Use with Care
Author: Brian Sturgess
Published: December 2017
Pages: 1-6
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Politicians focus on trade deficits and surpluses between countries and threaten trade wars and retaliatory actions, but the conventional international trade statistics used by many commentators are inaccurate. World exports and imports do not balance, but asymmetries are also found in the balance of trade statistics between countries and regions and these discrepancies can be very large in emerging markets. The ‘Rotterdam effect’ distorts the measurement of trade flows and balances where goods are recorded as imports into one country, which subsequently re-exports them to third countries without taking note of the country of origin. The Apple ‘Made in China’ question, or the existence of global value chains where much trade is in intermediate inputs, indicates that conventional trade statistics involve double-counting and misallocated trade balances.


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