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Commodity prices less volatile than manufactured goods, impacting global trade.
The study looked at commodity prices from 2002 to 2011 and found that prices of raw materials are generally less volatile than prices of manufactured goods. This means that the prices of things like crops or minerals don't change as much as the prices of things like electronics or cars. The researchers also checked different factors that could affect the results, like how products are classified or errors in the data, and found that these factors didn't change the main finding.