Answering a Simpler but More Tractable Question

Paul Krugman writes:

[My] full [introduction to Keynes's General Theory] is up at Bobby Pelgrift's site; some readers might be interested: http://www.pkarchive.org/economy/GeneralTheoryKeynesIntro.html

Fwiw, I thought my novel insight was the importance of [John Maynard] Keynes's decision NOT to worry much about the dynamics of the business cycle; it really is interesting to see how [Gottfried] Haberler got bogged down on the wrong question.