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The policy prescriptions of Real Business Cycle Theory (neoclassical school of macroeconomics which grew out of Robert Lucas' rational expectations) is the diametric opposite of what Keynes prescribed. Have you ever heard of saltwater vs. freshwater?
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This is spot on. It's funny how Austrians characterize the current macroeconomic debate as themselves vs. the Keynesians (see Hayek/Keynes rap). Don't they know that Keynesianism has been shot down long ago by the Lucas critique?
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I think Austrian economics appeals to the economically illiterate because it's not a rigorous science. Its outright rejection of empirical evidence, refusal to make use of econometric and statistical methods, and lack of mathematical formalization allows anyone with a moving pie hole to join in the debate. I mean it's hard to solve New Keynesian
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Price fixing is illegal because it results in a loss of Pareto efficiency due to a deadweight loss. That is the most precise answer you will ever get.