China is part of BRIC atm so I wounldn't doubt them developing fast, while USA is lagging.
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BRIC or BRICs are terms used in economics to refer to the combination of Brazil, Russia, India, and China. General thinking is that the term was first prominently used in a thesis of the Goldman Sachs investment bank.[1] The main point of this 2003 paper was to argue that the economies of the BRICs are rapidly developing and by the year 2050 will eclipse most of the current richest countries of the world. It's important to note that the Goldman Sachs thesis isn't that these countries are a political alliance, like the European Union, or a formal trading association, but they have the potential to form a powerful economic bloc.
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Goldman Sachs argues that the economic potential of Brazil, Russia, India, and China is such that they may become among the four most dominant economies by the year 2050