Inflation can ?grease? the wheels of economic adjustment in the labor market by relieving the constraint imposed by downward nominal wage rigidity, but not if there is also substantial downward real wage rigidity. At the same time, inflation can throw ?sand? in the wheels of economic adjustment by degrading the value of price signals. A number of recent studies suggest that wage rigidity is much more important for business cycles and monetary policy than previously believed (see Erceg, Henderson and Levin, 2000, Smets and Wouters, 2003, and Hall, 2005). Thus, our results on how wage rigidity and other labor market imperfections vary between countries and how they are affected by the rate of inflation should be of considerable value in formulating monetary policy and conducting related research.
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