The US and Japan are countries with people who are not afraid to work, and both are countries with liberal economic policies. Superior work ethic combined with superior economic viability allows for those countries to be superior in GDP.
The United States has about 300 million people and a high-per capita income, making it the largest economy per person and one of the largest in the word. Japan has about 100 million people and as high per-capita income as the US.
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The US is not the largest economy "per person" as mentioned above. It is also not "one of the largest in the world," it is simply the largest. add a comment
USA and Japan have amassed a large amount of intellectual and capital property. This means they have the ability to invent and manufacture things quickly.
