Staff Reports
The big whodunit in the inflation saga just got a new suspect lineup. A fresh paper by economists Domenico Giannone and Giorgio Primiceri — presented at Brookings — finds that most of the post‑pandemic inflation surge looks a lot more like an overheating economy than a mere traffic jam at the docks. That finding rewrites a lot of mainstream talking points and hands Republicans a clear line: when government borrows and spends too much, prices pay the bill.
Demand-Driven Inflation: The New Finding
Giannone and Primiceri’s research lays out a simple, bold idea: roughly two‑thirds of the post‑COVID inflation surge was driven by stronger‑than‑expected demand. That demand came from three places — pent‑up private spending, big fiscal stimulus, and a monetary stance that stayed too loose for too long. The paper uses structural time‑series methods and real‑time checks to reach that conclusion, and the Brookings discussion made the “about two‑thirds” line the headline. In plain English: prices rose because Americans had money to spend and the government and the Fed didn’t do enough to cool things off.
Don’t Believe the 90% Soundbite
Before anyone starts waving a 90 percent banner — including some eager opinion pages — check the math. The paper and the Brookings transcript say “about two‑thirds,” not 90 percent. That matters. Model choices change the share you assign to demand versus supply. So this is a major re‑weighting in the debate, not an ironclad verdict that obliterates every other study. Still, it’s a vindication of the claim many conservatives made early on: big stimulus matters for inflation.
Who Lit the Match: Spending, the Fed, and Pent‑Up Demand
The authors point to three culprits working together. First, consumers unleashed pent‑up demand as lockdowns eased. Second, fiscal policy added fuel — deficits jumped sharply during the pandemic recovery, putting more purchasing power into the economy. Third, monetary policy was unusually accommodating: the Fed “looked through” price pressures for too long while inflation ran hot. Jerome Powell was Fed chair during that period, and the paper argues that the Fed’s reaction function helped the demand story persist. In short: private buying, big government checks, and easy money made a bad mix.
Debate Continues — Models and Data Matter
Don’t toss supply‑chain explanations into the trash yet. Other reputable work finds a larger role for shortages and bottlenecks. The new paper itself warns that the split between demand and supply depends on the monetary‑policy benchmark and other model choices. So we should treat these numbers as evidence, not gospel. But for policymakers and voters, the takeaway is clear: narrative control matters. Blaming “global supply chains” was a convenient cover for policy choices that helped fan inflation’s flames.
So What Now? Policy Lessons for Washington
If demand was the main driver, the lesson is plain and conservative: fiscal restraint and timely monetary tightening matter. Republicans can and should press that case — not as partisan hand‑waving but as sound economics backed by serious scholars. The Brookings‑backed paper doesn’t settle every dispute, but it hands conservatives a credible argument against using inflated deficits as a permanent economic tool. Washington should learn the lesson: spend less when the economy is already hot, and don’t wait until prices are screaming to tighten policy. Voters paid the tab once. They shouldn’t be forced to pick up the same bill again.
