For 10 points, name this economist, the author of The General Theory of Employment, Interest and Money.
This man claimed that involuntary unemployment disproved Say's Law. This economist first argued that employment and output were determined by fluctuations in aggregate demand, rather than in factor prices, suggesting that factor prices were "sticky." John Hicks developed the IS/LM model based upon this man's theories. A graph of desired total spending is known as the namesake cross of this developer of the multiplier theory. For 10 points, name this economist, the author of The General Theory of Employment, Interest and Money.
This man claimed that involuntary unemployment disproved Say's Law.
John Maynard Keynes