DP16414 Can Monetary Policy Create Fiscal Capacity?

Author(s): Vadim Elenev, Tim Landvoigt, Patrick Shultz, Stijn van Nieuwerburgh
Publication Date: July 2021
Keyword(s): Fiscal policy, forward guidance, Long-run risk, monetary policy, public debt, Quantitative easing
JEL(s): E1, E12, E42, E43, E52, E62, G12, G28
Programme Areas: Financial Economics, Monetary Economics and Fluctuations
Link to this Page: cepr.org/active/publications/discussion_papers/dp.php?dpno=16414

Governments around the world have gone on a massive fiscal expansion in response to the Covid crisis, increasing government debt to levels not seen in 75 years. How will this debt be repaid? What role do conventional and unconventional monetary policy play? We investigate debt sustainability in a New Keynesian model with an intermediary sector, realistic fiscal and monetary policy, endogenous convenience yields, and substantial risk premia. When conventional monetary policy is constrained by the ZLB during an economic crisis, increased government spending and lower tax revenue lead to a large rise in government debt and raise the risk of future tax increases. We find that quantitative easing (QE), forward guidance, and an expansion in government discretionary spending all contribute to lowering debt/GDP ratio and reducing this fiscal risk. A transitory QE policy deployed during a crisis stimulates aggregate demand.