There is one good thing about Marx: he was not a Keynesian.
I would reject the distinction between a Keynesian moment and a behavioral moment.
You could be disqualified for a job [at Harvard] if you were either smart or Jewish or Keynesian. So what chance did this smart, Jewish, Keynesian have?
Popular as Keynesian fiscal policy may be, many economists are skeptical that it works. They argue that fine-tuning the economy is a virtually impossible task, and that fiscal-stimulus programs are usually too small, and arrive too late, to make a difference.