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World Economics - Measuring the World Economy
The Value of Value Added
William Powers, World Economics, December 2012
As production has become more globally integrated, imported components account for a rising share of the value of exports. Many countries may contribute inputs to a good, and the final assembler may capture only a small share of the product’s value. Official trade statistics, which attribute all value to the final exporter, can be uninformative or misleading about a country’s global engagement and its participation in global supply chains. New measures are required that incorporate both production and trade, and track the flow of inputs, and their value, through industries and across national borders. This paper examines the construction and use of value-added measures that incorporate the necessary production and trade data, and evaluates their performance against similar measures based on gross trade. The value-added measures provide a more revealing look into global integration that is consistent across different measures and analytical approaches.



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