The Keynesian Growth Approach to Macroeconomic Policy and Productivity
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Recessions can lead to prolonged slowdowns in productivity growth, causing persistent deviations from prerecession output trends. This phenomenon, known as hysteresis, was evident after the Great Recession.
"....A view deeply entrenched in mainstream macroeconomics is that trend productivity growth is the outcome of technological and institutional factors and can be treated essentially as an exogenous force, unresponsive to business cycles or monetary policy actions. The workhorse macroeconomic models used by international organizations and central banks are built upon this notion. This view, however, struggles to explain some key empirical facts.... recessions tend to be followed by prolonged slowdowns in productivity growth, causing persistent deviations of output from prerecession trends. This evidence suggests that recessions have an impact on long-run output, a phenomenon known as hysteresis...the Great Recession has been associated with permanent drops in the trend path of output in most advanced economies. These facts, as pointed out by several economists....suggest that the conventional wisdom might be incomplete and that trend productivity responds to changes in aggregate demand. In turn, this suggests that traditional views on the link between monetary policy and long-term growth need to be re-evaluated....."
Gianluca Benigno and Luca Fornaro, "The Keynesian Growth Approach to Macroeconomic Policy and Productivity," Federal Reserve Bank of New York, April 1, 2019, https://libertystreeteconomics.newyorkfed.org/2019/04/the-keynesian-growth-approach-to-macroeconomic-policy-and-productivity.html


