gambit
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The PPP is one of many metrics to gauge one economy against another.So do you think China has a bigger economy than America already?
I don't. The Chinese government doesn't.
China Economy Surpasses US In Purchasing Power, But Americans Don't Need To Worry
If we look at an economy as a collection of many economies, such as the currently controversial health care economy or manufacturing economy, then just like the ibtimes article pointed out, the conventional GDP metric is more useful and perhaps closer to the true economic might and potential of a country.However, PPP is less useful when measuring goods and services, like air-craft carriers or international shipping rates, that cannot be adjusted for cost of living. For a broader look at an economy's health, nominal GDP -- which represents the sum total of goods and services produced in a country -- is more useful. By this measurement, the U.S. continues to hold a significant advantage: In 2013 the U.S. GDP was $16.72 trillion, whereas China's GDP equaled a mere $9.33 trillion. Considering that China has used its growing wealth to, among other things, greatly improve its military capacity, conventional GDP remains significant.