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Before I go on, the full paper is here (please do read and cite!) – but I wanted to share my favorite parts christinahydepatterson.com/_files/ugd/322…
The paper is motivated by a (somewhat shocking, IMO!) point from Emi Nakamura and @JonSteinsson JEP article (). Most economists use narrative arguments for monetary policy, not modern identification. pubs.aeaweb.org/doi/pdfplus/10…
Going back to Keynes, macroeconomists have cared about the aggregate marginal propensity to consume: if you add a $ to economy, how much does that $ propagate further (I spend 50% of the $ buying from you, you spend 50% of that 50%, etc.)
(the is the source if anyone wants to look: covid.cdc.gov/covid-data-tra…