Does Unconventional Monetary and Fiscal Policy Contribute to the COVID Inflation Surge?

We assess whether unconventional monetary and fiscal policy implemented in response to the COVID-19 pandemic contribute to the 2021-2023 inflation surge through the lens of several empirical methodologies---event studies, vector autoregressions, and regional panel regressions using granular data---and establish a null result. The key economic mechanism works through a disinflationary channel in the Phillips curve while monetary and fiscal stimuli put positive pressure on inflation through the usual demand channel. We illustrate this negative supply-side channel both theoretically and empirically.