A central proposition in the Phillips curve view of the inflation process is that prices are marked up over productivity-adjusted labor costs. If that is true, then long-run movements in prices and labor costs must be correlated. If long-run movements in a time series are modeled as a stochastic...

Granger-causality tests used here find that: [1] unit labor costs add no predictive power to inflation forecasts; and [2] the gap between actual and potential output does help predict inflation, but only in the short run.

A central proposition in the Phillips curve view of the inflation process is that prices are marked up over productivity-adjusted labor costs. If that is true, then long-run movements in prices and labor costs must be correlated. If long-run movements in a time series are modeled as a stochastic...