2023-06-26-彼得森经济研究所-是什么导致了美国疫情时期的通货膨胀_（英）_41页_1mb

During the pandemic era, inflation surged significantly starting in 2021, contrary to initial expectations that it was driven by overheated labor markets. The authors, Ben Bernanke and Olivier Blanchard, used a dynamic model to analyze the direct and indirect effects of product-market and labor-market shocks on prices and wages. Their key findings are:

1. Initial Inflation Drivers: Most of the early inflation surge (2021-early 2022) was driven by product-market shocks, including:

   • Sharp increases in commodity prices (energy and food)
   • Sectoral price spikes due to imbalances between demand shifts (e.g., from services to durable goods) and supply constraints
   • These factors created shortages and raised prices without corresponding decreases in other sectors

2. Labor Market Effects: Labor markets did tighten dramatically (vacancy-to-unemployment ratio rose to record levels), but it was not the primary driver of inflation early on. The wage Phillips curve operated, but inflation expectations remained anchored, and workers did not significantly demand wage increases to compensate for unexpected inflation (weak catch-up effect).

3. Dynamic Shift: Over time, the labor market's contribution to inflation gradually increased, becoming dominant toward the end of their study period. This is due to persistent tight labor markets and the cumulative effects on wages and prices, though this was not sufficient to bring inflation down decisively without policy action.

4. Policy Implications: Controlling inflation ultimately requires balancing labor demand and supply but must account for structural factors like supply-chain bottlenecks and evolving inflation expectations. Successful disinflation depends on resolving other shocks and achieving a sustainable equilibrium in labor markets.

In summary, the 2021-2023 inflation surge was initially explained by external demand pressures and supply-side disruptions more than labor-market tightness. While the labor market eventually contributed substantially, policy actions must address both fronts—cooling demand while improving labor supply and matching efficiency—to achieve sustainable price stability.