Add up everything produced and sold in every economy on Earth in one year in the mid 2020s. Roughly what is world GDP in US dollars?
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Answer
About 110 trillion USD
Just two countries, the United States and China, account for a little over 40 percent of the total.
How to estimate it
Split humanity into two groups. About 1 billion people live in rich countries producing around 50,000 dollars each: 50 trillion. The other 7 billion average about 8,000 dollars each: 56 trillion. 50 + 56 = 106 trillion dollars. The IMF and World Bank put world GDP in the mid 2020s at about 110 trillion US dollars.
Source: World Bank; IMF
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