Dear All,

The Department of Economics invites you to their weekly seminar on Wednesday, February 5th, 2025.

Time: 1:40 PM to 2:50 PM

Zoom Link: https://zoom.us/j/94862645088?pwd=6EMQTW1if8DxSKoHExdCdADBqWbZuN.1

Speaker: Ivan Yotzov

Title: How Curvy is the Phillips Curve?

Abstract: Macro data suggests a convex relationship between inflation and economic slack, but identifying causality is challenging. Using micro data from large panel surveys of UK and US firms we show that the response of prices to demand shocks is also convex at the firm level. We obtain similar results using three different empirical exercises examining: the impact of COVID demand shocks, the response to sales shocks, and hypothetical shocks from a survey question. This convexity is strongest in firms and industries with higher inflation, disappears in horizons beyond two years, and is also present in response to cost shocks. We rationalize these findings in a menu cost model with positive trend inflation and decreasing returns at the firm level, which replicates firm and aggregate Phillips curve convexity. The non-linearity emerges from trend inflation pushing firms closer to their price increase thresholds.

Here is the link to the full paper, in case you want to share that as well: How Curvy is the Phillips Curve? | NBER