MATT O'BRIEN VS. MARTIN FELDSTEIN ON QUANTITATIVE EASING by DeLong

Tax Code May Be the Most Progressive Since 1979 by Annie Lowrey

Construction Numbers May Not be What They Seem by Dean Baker

The state of macroeconomics: it all went wrong in 1958 by John Quiggen

Third, Friedman used his critique of fine-tuning that macro policy should be confined to a rules-based monetary policy, with no role for fiscal policy. Although Friedman’s own prescription (a rule controlling the rate of growth of the money supply) was unsuccessful and quickly abandoned, these ideas were the basis of the policy regime, based on the use of interest rates as an instrument to meet inflation targets, that prevailed from the 1980s to the financial crisis, and to which central banks plan to return as soon as the crisis is over. 

The real decline was in the 1970s and 1980s, as Friedman’s already overstated critique of Keynesianism was pushed to the limits of credibility and beyond. The big ideas of the period: Ricardian equivalence, Rational Expectations, Policy Ineffectiveness, Microfoundations, Real Business Cycle theory and the (strong-form) Efficient Markets Hypothesis were based on plausible (to economists, anyway) arguments. They didn’t have much empirical support but, given that Keynesian models weren’t working well either, this wasn’t enough to stop them taking over the debate. 

The main response was New Keynesianism which showed that with plausible tweaks to the standard micro assumptions, some Keynesian results were still valid, at least in the short run. New Keynesianism gave a rationale for the countercyclical monetary policies pursued by central banks in the inflation targeting era, whereas the classical view implied that a purely passive policy, such as Friedman’s money supply growth rule, was superior. Broadly speaking the pre-crisis consensus consisted of New Keynesians accepting the classical position in the long run, and most of Friedman’s views on short-term macro issues, and abandoning advocacy of fiscal policy, while the New Classicals acquiesced in moderately active short-term monetary policy 

How you evaluate this consensus depends on your view of the period from 1990 to the crisis. Noah Smith, quoting Simon Wren-Lewis says 

Implicit in this view is the idea that the Great Moderation was a policy success and that the subsequent Great Recession was the result of unrelated failures in financial market regulation. My view is that the two can’t be separated. In the absence of tight financial repression, asset price bubbles are regularly and predictably[3] associated with low and stable inflation. Central banks considered and rejected the idea of using interest-rate policies to burst bubbles, and the policy framework of the Great Moderation was inconsistent with financial repression, so the same policies that gave us the moderation caused the recession.

To sum up, work done in macroeconomics since the discovery of the Phillips curve has offered an improved understanding of a wide range of issues. On the other hand, it has produced and sustained the dominance, in central banks and in much of the economics profession, of an empirically unsupportable position that is resolutely opposed to fiscal stimulus, or to any large-scale countercyclical policy. It has also diverted most of the intellectual energy of academic macroeconomists into a largely fruitless search for microfoundations, at the expense of an improved understanding of the various co-ordination failures that are at the heart of the macroeconomic problem. 

I don’t suggest throwing out everything that’s been done since 1958 and starting all over from there. But, in many ways, that would be a better choice than continuing on the current path.