Josh Hendrickson discusses Milton Friedman’s famous k-percent rule on his blog, using Friedman’s rule as a vehicle for an enlightening discussion of the time-inconsistency problem so brilliantly described by Fynn Kydland and Edward Prescott in a classic paper published 36 years ago. Josh recognizes that Friedman’s rule is imperfect. At any given time, the k-percent rule is likely to involve either an excess demand for cash or an excess supply of cash, so that the economy would constantly be adjusting to a policy induced macroeconomic disturbance. Obviously a less restrictive rule would allow the monetary authorities to achieve a better outcome. But Josh has an answer to that objection.
The k-percent rule has often been derided as a sub-optimal policy. Suppose, for example, that there was an increase in money demand. Without a corresponding increase in the money supply, there would be excess money demand that even Friedman believed would…
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Utopia, you are standing in it! 
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