The following editorial appears on Bloomberg View:

What does it mean when the label on your mobile device says "Made in China"? Possibly a lot less than you thought.

Trade experts have known for years that the complete story of the global economy can't be gleaned from data on the flow of finished goods and services among countries. Trade figures register the value and volume of stuff leaving one country and entering another, yet the numbers are misleading.

Consider your mobile phone. Trade data ignore that various parts of it are made in the United States and shipped to China. As the final assembler, China gets credit for phone exports from its shores, while the U.S. shows up as an importer, making the trade deficit between the two countries appear worse than it really is.

The Organization for Economic Cooperation and Development and the World Trade Organization set out to fix this by deconstructing the global supply chain to show how much of an exported phone, truck or dress really originates in a given country. The result is a new data set that could change the entire trade debate.

The "trade in value-added" database shows, for example, that the U.S. deficit with China in 2009 (the latest year's trade statistics examined in the report) was almost 26 percent smaller — $130 billion instead of $175 billion &mdash'; because Chinese electronics include numerous components from the U.S. and other places.

The figures also show that a third of the value of a German-made car can be traced back to goods and services from other countries.


And despite what existing trade figures say, the United States, not Germany, is France's largest trading partner.

The policy implications are profound. If China is getting more credit than it deserves for its exports, then U.S. imports of Chinese products aren't wiping out as many American jobs as the data suggest. China's export machine may even be creating American, European and other Asian jobs by sourcing components from those countries.

The study suggests that a country's capacity to import parts and materials is as important for success in the global economy as the ability to manufacture a product. This means countries with efficient port facilities and streamlined border controls, allowing goods to enter and exit quickly, will have a leg up in global trade.

What's more, the data suggest that trade barriers, especially tariffs, may be hurting economies by raising the prices of goods and services throughout the global supply chain, rather than sheltering the jobs they were erected to protect. As the study says, "Tariffs and other barriers on imports are a tax on exports."

Importantly, the new numbers more accurately capture the role of services — which, it turns out, account for about one-third of the value of all manufactured goods. Surprisingly, Germany earns more from exporting services than it does from exporting manufactured goods. In the U.S., the service sector is responsible for more than 50 percent of all exports. The message for government officials looking to boost competitiveness and create wealth: Focus more on improving productivity in services.

The anti-trade forces in Congress and labor groups would do well to study the data and get off their "China as a currency manipulator" hobbyhorse. Currency policy is less important than free-trade deals, including the pact that the U.S. is pursuing with the countries of the Asia-Pacific region and another one the U.S. may try to negotiate with the European Union.