> US economy is the biggest in the world, twice as big as the next country, and 5 times bigger than Japan Nominally yes, but PPP is generally more apt. > GDP

> US economy is the biggest in the world, twice as big as the next country, and 5 times bigger than Japan Nominally yes, but PPP is generally more apt. > GDP comparisons using PPP are arguably more useful than those using nominal GDP when assessing a nation's domestic market because PPP takes into account the relative cost of local goods, services and inflation rates of the country, rather than using international market exchange rates which may distort the real differences in per capita income. https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP) https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)