ABSTRACT
Macroeconomics is an outgrowth from the main stream of classical monetary theory following Keynes. Keynes changed the emphasis from determination of the level of money prices to determination of the level of output and employment. He also changed the key relationship from demand and supply of money as determining the price level to the relationship between consumption expenditure and income, in conjunction with private investment expenditure, as determining the level of output and therefore employment demanded. The income multiplier replaced the velocity of circulation as the key concept of monetary theory.
