The world's second largest economy by GDP is China.
 However, Italy has included estimates of informal activity in their GDP calculations since 1987 to 2023, which swells their GDP by an estimated 18% and in 2014, a number of European countries formally changed their GDP calculations to include prostitution and narcotics sales in their official GDP statistics, in line with international accounting standards, prompting an increase between 3-7%
 In the late 1950s, the economic growth in America and Europeoften called Wirtschaftswunder (ger: economic miracle) brought up a new form of economy: mass consumption economy

