Brad DeLong recently did a post (“The Disappearance of Monetarism”) referencing an old (apparently unpublished) paper of his following up his 2000 article (“The Triumph of Monetarism”) in the Journal of Economic Perspectives. Paul Krugman added his own gloss on DeLong on Friedman in a post called “Why Monetarism Failed.” In the JEP paper, DeLong argued that the New Keynesian policy consensus of the 1990s was built on the foundation of what DeLong called “classic monetarism,” the analytical core of the doctrine developed by Friedman in the 1950s and 1960s, a core that survived the demise of what he called “political monetarism,” the set of factual assumptions and policy preferences required to justify Friedman’s k-percent rule as the holy grail of monetary policy.
In his follow-up paper, DeLong balanced his enthusiasm for Friedman with a bow toward Keynes, noting the influence of Keynes on both classic and…
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