Sticky Wages, Incomplete Pass-Through and Inflation Targeting: What is the Right Index to Target?

This paper studies optimal monetary policy in a small open economy with Inflation Targeting, incomplete pass-through and rigid nominal wages. The paper shows that the right index to target depends on the structure of the individual economy. When wages are fully flexible, the consumer price index (CPI) is better to target given low to moderate levels of pass-through. On the other hand, assuming complete pass-through, economies with relatively high degrees of wage rigidity and wage indexation should either target their CPIs or fully stabilize nominal wages. Also, CPI targeting and nominal wage targeting are superior to targeting the Producer Price Index (DPI) in relatively high degrees of pass-through given that wages are relatively rigid and indexation degrees are high. The results of the paper suggest that, by committing to a common monetary policy in a common-currency area, some countries may not be conducting monetary policy optimally.