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Yet a shortage of demand is not mentioned, even as a remote possibility, by Prof Lucas. As a convinced classicist, he seems to have ruled this out by a priori conviction, rather than any detailed empirical work. That still remains to be done.
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Oddly, Paul Krugman and Matt Yglesias seem to think that Lucas denies that demand shocks cause recessions–which is clearly not Lucasâs view.
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Let me add to this discussion by noting that recently I met Robert Lucas at a conference. We started talking and, among other things, he expressed his support for nominal GDP targeting because it would have given the Fed more flexibility in responding to the severe spending shocks. That is, it would have allowed the Fed to have been more aggressive with monetary policy while still being systematic. He was also sympathetic to my view that currently there was too much concern about inflation. At a conference dominated by inflation hawks, I found him to be a refreshing breath of fresh air.
PS. We also talked about his former student Scott Sumner and Sumner's proposal for NGDP futures targeting. He was intrigued by it and compared it to Lars Svensson's work on targeting the forecast.
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