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By Edmund Phelps
Published: November 2 2009 20:55 | Last updated: November 2 2009 20:55
In the theory wars, which are as much wars over policy choices, two very bad kinds of theories are driving out good theories.
Keynesian economics, which had been nearly forgotten inside the macro field, has found new voices from outside. They take the position that fiscal "stimulus" of all kinds is effective against slumps of all causes. Their strategy is to defeat their only popular rivals, the neoclassicals, by deriding their view that the employment downturn involves a contraction of the labour supply.
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