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Keynesian economics derives from John Maynard Keynes , in particular his book " The General Theory of Employment , Interest and Money " ( 1936 ) , which ushered in contemporary macroeconomics as a distinct field .
 John Maynard Keynes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 John Maynard Keynes