American economic history
G force
Why economic growth soared in America in the early 20th century, and why it won’t be soaring again any time soon
Jan 9th 2016 The Economist From the print edition
http://www.economist.com/news/books-and-arts/21685437-why-economic-growth-soared-america-early-20th-century-and-why-it-wont-be
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