The most interesting moment at a recent conference held in Bretton Woods, New Hampshire – site of the 1945 conference that created today’s global economic architecture – came when Financial Times columnist Martin Wolf quizzed former United States Treasury Secretary Larry Summers, President Barack Obama’s ex-assistant for economic policy. '[Doesn’t] what has happened in the past few years,” Wolf asked, “simply suggest that [academic] economists did not understand what was going on?'
"Here is the most interesting part of Summers’ long answer: 'There is a lot in [Walter] Bagehot that is about the crisis we just went through. There is more in [Hyman] Minsky, and perhaps more still in [Charles] Kindleberger.' That may sound obscure to a non-economist, but it was a devastating indictment....
"...He talked about 'the revolution in finance as it was realized that asset prices show large volatility that does not reflect anything about fundamentals,' but added that 'macroeconomics [did not] keep up with [this] revolution.' As a result, 'to the great detriment of contemporary macroeconomics,' his fellow economists did not understand asset prices, manias, panics, and liquidity...."
Maybe Prof. DeLong will wake up to MMT and learn that some "heterodox economists" have been working in this field for decades.