Germany started fighting WWI in 1914 with a GDP per capita measured in Maddison 1990s dollars of c. $3800 i.e.

Germany started fighting WWI in 1914 with a GDP per capita measured in Maddison 1990s dollars of c. $3800 i.e. that of lower middle income country. War expenditure rockets to 50% of GDP by 1917 and GDP collapsed.
Stark data from @mark4harrison and Broadberry Economics of WWI. https://t.co/Z7K2mmESYo

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