The answer is "John Maynard Keynes's theory".
Keynesian financial aspects created amid and after the Great Depression, from the thoughts displayed by John Maynard Keynes in his 1936 book, The General Theory of Employment, Interest and Money. Keynesian business analysts for the most part contend that, as total request is unpredictable and shaky, a market economy will regularly encounter wasteful macroeconomic results as monetary retreats and and inflation.
