State-dependent pricing models are now an operational framework for quantitative business cycle analysis. The analysis in Ball and Romer (1991), however, suggests that such models may be rife with multiple equilibria: in their static model price adjustment is always characterized by...

How often do the nominal prices of individual goods change? What is the nature and magnitude of costs of price adjustment? Economists seeking to construct macroeconomic models useful for monetary policy analysis must know the answers to these questions. The empirical literature reveals that many...