Gavyn Davies summarizes:
The great financial crash of 2008 was expected to lead to a fundamental re-thinking of macro-economics, perhaps leading to a profound shift in the mainstream approach to fiscal, monetary and international policy. That is what happened after the 1929 crash and the Great Depression, though it was not until 1936 that the outline of the new orthodoxy appeared in the shape of Keynes’ General Theory. It was another decade or more before a simplified version of Keynes was routinely taught in American university economics classes. The wheels of intellectual change, though profound in retrospect, can grind fairly slowly.
Seven years after 2008 crash, there is relatively little sign of a major transformation in the mainstream macro-economic theory that is used, for example, by most central banks. The “DSGE” (mainly New Keynesian) framework remains the basic workhorse, even though it singularly failed to predict the crash. Economists have been busy adding a more realistic financial sector to the structure of the model , but labour and product markets, the heart of the productive economy, remain largely untouched.
What about macro-economic policy? Here major changes have already been implemented, notably in banking regulation, macro-prudential policy and most importantly the use of the central bank balance sheet as an independent instrument of monetary policy. In these areas, policy-makers have acted well in advance of macro-economic researchers, who have been struggling to catch up.
The IMF has tracked this process well, and it has just held its third post-2008 conference on Rethinking Macro Policy under the leadership of chief economist Olivier Blanchard. Olivier has summarised the conference (here and here) but so far it has it not been much discussed by macro investors.
I have therefore taken the liberty of organising Olivier’s summary and the conference material into the three tables below. Although highly simplified, the tables represent a snapshot of the current “state of the art” in macro policy, at least as seen by today’s mainstream luminaries of the subject.
In conclusion, what should we expect from macro-policy makers in future, assuming the economic back-drop remains relatively benign? Probably, more of the same: broadly stable central bank balance sheets, very slow declines in public debt ratios and a gradual return to using interest rates as the main weapon of monetary policy. A more rapid return to pre-2008 norms for fiscal and central bank balance sheets is somewhat unlikely.
To call the economic back-drop benign is a stretch; but while that remains the conventional thinking, Summer´s “Great Stagnation” thesis will continue to be ‘celebrated’!
Why can´t they see that the “GS” is the exact opposite of the “Great Inflation”? Interestingly, while the “GI” was going on, the prevalent thought was also that monetary policy couldn´t do much to abate it!