How, and For How Long, Did Keynes Maintain the Treatise Theory?

Many historians of economic theory have by now studied how Keynes developed his theory from A Tract on Monetary Reform through A Treatise on Money to The General Theory. After the pioneering studies by Moggridge (1973) and Patinkin (1976, 1982), there followed Dimand (1988), Amadeo (1989), Clarke (1988,1998), Melzer (1988), Moggridge (1992), Skidelsky (1992), Laidler (1999), and others. This is no wonder, for the Keynesian Revolution remains the most singular phenomenon that economic theory and policy have ever seen.