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Keen Behavioural Finance 2011 Lecture 02 Market Behaviour Part 1

Summary:
In the last lecture I showed that the Neoclassical model of consumer behavior doesn’t work, and is computationally impossible. In this lecture, I show that even if it did work, a market demand curve derived by aggregating the demands of numerous utility-maximizing individuals can have any shape at all. The so-called Sonnenschein-Mantel-Debreu conditions (first discovered ...

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In the last lecture I showed that the Neoclassical model of consumer behavior doesn’t work, and is computationally impossible. In this lecture, I show that even if it did work, a market demand curve derived by aggregating the demands of numerous utility-maximizing individuals can have any shape at all. The so-called Sonnenschein-Mantel-Debreu conditions (first discovered in 1953 by Gorman) show that even market demand can’t be represented by the demand of a single utility-maximizing consumer–yet Neoclassical DSGE models treat the entire economy as a single utility maximizer.


Steve Keen
Steve Keen (born 28 March 1953) is an Australian-born, British-based economist and author. He considers himself a post-Keynesian, criticising neoclassical economics as inconsistent, unscientific and empirically unsupported. The major influences on Keen's thinking about economics include John Maynard Keynes, Karl Marx, Hyman Minsky, Piero Sraffa, Augusto Graziani, Joseph Alois Schumpeter, Thorstein Veblen, and François Quesnay.

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