"Zombie ideas" are "beliefs about policy that have been repeatedly refuted with evidence and analysis but refuse to die," according to Paul Krugman. The astonishment that Krugman expresses about the return of erroneous ideas again and again that simply won't die regardless of how much evidence there is to destroy them springs from Krugman's belief in policymakers being rational beings.
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Larry,
Can we put “school vouchers” on your list of idea that keeps being killed but won’t go away? Vouchers are just another way of trying to kill public education as we know it.
David