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Discussion Paper
Anatomy (not Autopsy) of the Phillips Curve
The relationship between inflation and real economic activity has long been central to debates in macroeconomics and monetary policy. At the core of this debate is the Phillips curve (PC), which measures how strongly inflation reacts to movements in economic conditions. The steepness of this curve matters enormously for monetary policy: if the PC is steeper, inflation rises faster during booms and falls faster in recessions, which entails central banks having to act more forcefully if they want to stabilize inflation around their target. Prior analysis found astonishingly small estimates of ...
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Financial Shocks, Productivity, and Prices
We study the interconnection between the productivity and pricing effects of financial shocks. Combining administrative records on firm-level output prices and quantities with quasi-experimental variation in credit supply, we show that a tightening of credit conditions has a persistent, yet delayed, negative effect on firms’ long-run physical productivity growth (TFPQ) but also induces firms to change their pricing policies. Commonly used revenue-based productivity measures (TFPR)—which conflate price and productivity—offer biased predictions regarding the consequences of financial ...
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Artificial Intelligence and Monetary Policy: A Framework and Perspective on Cyclical Transmission, Structural Transition, and Financial Stability
I develop a framework analyzing how artificial intelligence (AI) reshapes monetary policy through three interrelated channels: cyclical transmission, structural transition, and financial stability. In the short run, AI can alter inflation dynamics by changing how supply and demand disturbances map into prices—through shifts in production technologies, pricing behavior, cost pass-through, and expectations—even when conventional measures of economic slack are unchanged. Over longer horizons, AI may shift the natural benchmarks around which policy is calibrated, including potential output ...
Discussion Paper
Does the Phillips Curve Steepen When Costs Surge?
Inflation does not always respond to cost and demand pressures in the same way. When shocks are small, the mapping from costs to prices is roughly proportional—double the shock, double the inflation response. But when the economy is hit by large shocks, this proportionality breaks down. As the recent surge and subsequent decline of global inflation showed, price growth can accelerate—or decelerate—by more than one-for-one relative to the size of the disturbance. Economists refer to this pattern as nonlinear inflation dynamics. In this post, I discuss what these nonlinearities mean, how ...
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Micro and Macro Cost-Price Dynamics in Normal Times and During Inflation Surges
We develop a unified approach to studying cost-price dynamics in the cross-section of firms in order to jointly explain the time series of aggregate inflation and the frequency of price changes, both during normal times and inflation surges. A key novelty is the use of microdata on firms’ prices and production costs to construct an empirical measure of price gaps—the deviation between a firm’s listed and optimal price. Conditional on the path of aggregate cost shocks extracted from the data, a state-dependent pricing model with strategic complementarities accounts well for both the ...